Installation: Bosch O2 Sensor with SmartLink™

Simple, step-by-step instructions to assemble and install a Bosch Premium Oxygen Sensor with SmartLink™ connection system.

[@randysmith6385]

Help to understand what the printed directions are,only thing dose it matter which white wire goes to other white wire ?

[@TKD187]

Does it matter what two whites go together what do you want my dog chewed up wires under my truck I got most of everything put back together except for the O2 sensor because I didn't know if it mattered what two whites went together obviously black goes to Black griegos are gray then I'm left with two whites

[@zackdarpinian9980]

For future watchers, the "drawing air through the connection" is a real requirement. The O2 sensor works by measuring the O2 levels in the exhaust against the ambient O2 levels. Don't cover the hole in the connector that lets air in.

[@TroyMclore]

+Zack Darpinian I have 2 dark brown wires, one light brown and one purple, how to know if I connect the correct dark brown one?

[@komentatorius69]

wires do not measure shit, sensors does.

[@TheDogSheep]

The 8 yellow rubber plugs seals off air and water !

[@mohdsya7408]

The wire act as sensor too.

[@woodzyfox4735]

The outside air O2 is mesured by your intake Mass air flow/MAS or MAF

[@repairdrive]

Yeah that chart makes NO damn sense.

[@gibbedyg9369]

I have studied this for 3 years. I believe the "(Column A)" and "(Column B)" adds no information to the viewer.

[@ryanflagg7790]

how the fuck does air travel down a copper wire?

[@qiitxxsmitj3491]

Ryan Flagg my question as well

[@n5yiz]

That's got to be horseshit

[@pabloporta9635]

lmfaooooo

[@tedporter69]

Ryan Flagg He should have said heat

[@onlyme972]

It's bollocks, two wires heat the sensor and two that provide a signal to the ecu.

[@leightonboster3332]

I put one on my 2000 suburu and I still get cel and scanner live data reads no voltage from sensor. Maybe will just go with oem. But I had no instructions for wires.

[@computarman]

I would have thought twisting the wires together and shrink tubing or electrical tape would be fine for attaching the connector onto the oxygen sensor. The consistent story I get is that this is not acceptable and that the oxygen sensor works through minute differences in electrical resistance and that if there is any resistance from the connection at all, the reading to the computer could very easily be off. Many people go the cheaper route of the universal, but I am convinced that it's worth paying a little bit more for this crucial engine component. An OEM might be the second best choice for replacement.

[@xavierrochas]

Works great on my Mercedes Benz S500 4matic W220

[@tru6803]

It's a lie... first off these sensors do NOT transmit information of airflow through the wires... this is total BS... and secondly soldering does not really create additional electrical resistance... if you understand how electricity works you'd realize resistance would only occur if the wire contact area reduced... and lastly, just don't buy universals and much less BOSCHE for anything besides German vehicles.

[@Lughnerson]

Well thank you for this video, because your printed instructions are worthless. I do not even have the color code for the wires. If I had know this before ordering I would have gotten a different brand.

[@Flumphinator]

At least yours came with printed instructions.

[@qiitxxsmitj3491]

Lughnerson dido

[@clana07]

Yea I never got instructions for mine as well and I feel the same way job should take maybe 30min Max took a good hour cutting wiring what a joke thought Bosch was a great brand guess not anymore .....

[@bklyn1267]

Facts 💯

[@gameon--dj4tw]

Like single pictures with a eye on it. Lmao look here..and look here. 👀

[@SaltyTubers]

"It is critical to understand, that in order for the oxygen sensor to work properly, air must be drawn into the sensor via the connecting wires." Uh, no. In order for the sensor to work properly, use only the Posi-Lock connector when connecting the wires. Soldering the wires can lead to corrosion and failure of the connection if not done properly. Simple translation issue.

[@gregadams558]

Yea, I LOL'd at that comment. Air has ZERO to do with this setup. It is getting the proper wires to make a solid connection in the POS posilock connectors. If they don't wrap around the post when you tighten down, you are screwed.

[@cesaralfredotrejo]

Actually it's true. First generations of sensors had a vent hole where oxygen came in in order to make the O2 comparison. Modern ones don't have the breather hole so they don't get clogged by dirt, so the new "hole" is the space between the wire and it's insulation ;)

[@richardking6066]

@@cesaralfredotrejo If the connector is air and water tight, I find that very hard to believe! Sounds weird to me... but whatever!

[@josecepeda4431]

This is the explanation How Oxygen Sensors Work and Why Wiring Integrity is Crucial Understanding Oxygen Sensors: Oxygen sensors are vital components in your vehicle’s exhaust system. They measure the oxygen levels in the exhaust gases and provide data to the engine control unit (ECU). This information helps the ECU adjust the air-fuel ratio for optimal combustion, which improves performance and reduces emissions. The Role of Wires and Connectors: 1. Air Passage Through the Sensor: • Ambient Air Reference: Oxygen sensors need a reference to the ambient air to compare it with the oxygen levels in the exhaust gases. This reference air is crucial for the sensor to generate an accurate voltage signal. • Porous Wire Insulation: Some oxygen sensors have wires with a porous insulation that allows a small amount of ambient air to reach the sensor element inside. This design ensures the sensor can compare the oxygen content of the exhaust gas to the ambient air accurately. 2. Why Soldering is Problematic: • Heat Damage: Soldering wires can damage the porous insulation and the sensor’s delicate components due to the high heat involved. • Sealing Issues: Proper connectors and crimps are designed to maintain the necessary pathways for air to reach the sensor while also providing a secure, sealed connection. Soldering can disrupt these pathways, leading to inaccurate readings. • Mechanical Stress: Soldered joints are less flexible and more prone to breaking under the vibration and movement typical in a vehicle, which can compromise the sensor’s function. Explaining to Viewers: Here’s a simple way to explain it: Why Oxygen Sensors Need Proper Connections: Oxygen sensors help your car’s computer keep the engine running efficiently by measuring the oxygen levels in the exhaust. For these sensors to work correctly, they need to compare the exhaust gas to the outside air. How Does Outside Air Get to the Sensor? Some oxygen sensors have special wires that let a tiny amount of air through. This air travels through the insulation around the wires and reaches the sensor inside. This comparison between the exhaust gas and outside air helps the sensor generate an accurate signal that your car’s computer uses. Why Not Solder the Wires? • Heat and Damage: Soldering uses high heat, which can damage the special insulation and the sensor itself. • Sealing: Proper connectors are designed to keep the air pathways open while also sealing the connections. Soldering can block these pathways, leading to bad sensor readings. • Flexibility: Cars move and vibrate a lot. Soldered connections are stiff and can break more easily. Properly crimped connections are more flexible and durable. Using the right connectors and crimping tools ensures that the sensor can breathe and work correctly, keeping your engine running smoothly and efficiently.

[@abrahamo8934]

Just did this last night. This smart link is a very bulky cumbersome design, I wish I had just used butt connectors with shrink wrap or honestly just spent the extra money for one with a connector. These plastic pieces for the connector get in your way when you splicing, install the butt connectors and are putting on the car, require each end to have a minimal amount of wire. Otherwise these Bosch sensors are very solid great sensors, much better quality than the densos I pulled off the car. Because of this bulky cumbersome smartlink design I am sorry I would not recommend I hope Bosch figures out a better design because these sensors look very well built.

[@uri4151150]

My wires with other colors. How do you know how to connect the wires?

[@karingraves9461]

Our oxygen sensor new plug in has different color wires than old one . Who knows what new colors match to which factory wire colors?

[@neoraj9583]

Can this O2 sensor be used in place of the Sensor used in My Benelli Imperiale 400 by Delphi?

[@BoschAutoNA]

Hello. Thanks for reaching out. This site supports North America. I see you are asking about a vehicle in the UK. You will have to contact the Bosch UK office to ask your question. Here is the link to the Contact Us page of the Bosch UK web site. ecs.page.link/aScfC

[@Wrecker-op]

I need help idk how to use this one with a 2014 tundra because it has a blue wire and I don’t know which does the blue one connect too

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@woodzyfox4735]

WHat are the bosh wire pinouts?? My car doesnt match any of these... i dont have grey. Need bost pinouts polkz

[@BoschAutoNA]

Hello. Thanks for reaching out. What is the year, make and model of your vehicle?

[@SlickBraveLion]

Is there a universal oxygen sensor that fits into my 2002 Audi A6 3.0 Quattro? I see that my passenger side upstream sensor has four wires. The retail shops say that I need a specific oxygen sensor and a universal one will not fit. How am I going to connect five wires in the exact fit oxygen sensor to a four wire universal plug?

[@BoschAutoNA]

Bosch wideband sensors are tested and calibrated on assembly line, using a different connector that did not come on the original part when made could change the sensor output to the ECR. You can buy posi locks but if he has the right sensors I’m not sure why he need to do this unless the car has been modified and the sensor is too short now, if this is the case you should splice in wire between the sensor body and the connector that came with the sensor you purchased. Do not solder the wires, using posi locks and heat shrink tube is the best way to change the length of a sensor but once the wires are cut it will not be covered under warranty

[@SlickBraveLion]

That didn’t answer my question. Am I able to use a universal oxygen sensor on an Audi 2002 A6 3.0 Quattro?

[@BoschAutoNA]

Hi John. For the Upstream sensors that are wideband there is no universal sensor available, for the downstream post cat sensors we offer the 15733 universal sensor. If you don’t want to mess with the universals on the downstream, you can purchase a 16978.

[@ManuSolomon]

Hi @bosch automotive NA, Please suggest compatible O2 Sensor for Mercedes Benz (W204) C200 CGI (Make yr. 2011)

[@BoschAutoNA]

Hello. Thanks for reaching out. I am not seeing that MB model in our North American database. Where are you located? I may need to connect you to a Bosch office in your area.

[@SlickBraveLion]

Hello, I have a 2002 Audi A6 3.0 liter engine. I bought the specific Bosch oxygen sensor for my car since the universal sensors do not fit with my make and model vehicle. My Bosch sensor wiring has five wires. I will need to splice the wires since the plug is not able to be reached. From what I understand I can not solder the wires because air needs to flow through the wires. Can I just crimp the wires and use a heat shrink? The smart link will not work since it’s for four wires and I have five. Please advise if crimping and using a heat shrink will work instead.

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@BoschAutoNA]

Hi John. Thanks for reaching out. You can purchase a 17353 to replace with the OE part, direct fit.

[@SlickBraveLion]

Bosch Auto Parts yea that’s the part I have but I need to splice it but it doesn’t come with posi locks. If I buy my own posi locks will it provide the air channel necessary for the wires?

[@carolr183]

Do you have a link that explains how the reference oxygen is brought in through the harness wires? Even a patent reference? My mind is boggled.

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@BoschAutoNA]

Hi Carol. Thanks for reaching out. The air travels through the wires and is pulled in from the heating and cooling of the sensor, a process that creates a vacuum. This is similar to when a plastic container is placed in a microwave with a lid on. When pulled out, the lid is difficult to remove, as it created a vacuum.

[@josecepeda4431]

Sorry Bosch have a shotty reply this is the actual explanation although kinda long. Coming from an electrical engineer by the way How Oxygen Sensors Work and Why Wiring Integrity is Crucial Understanding Oxygen Sensors: Oxygen sensors are vital components in your vehicle’s exhaust system. They measure the oxygen levels in the exhaust gases and provide data to the engine control unit (ECU). This information helps the ECU adjust the air-fuel ratio for optimal combustion, which improves performance and reduces emissions. The Role of Wires and Connectors: 1. Air Passage Through the Sensor: • Ambient Air Reference: Oxygen sensors need a reference to the ambient air to compare it with the oxygen levels in the exhaust gases. This reference air is crucial for the sensor to generate an accurate voltage signal. • Porous Wire Insulation: Some oxygen sensors have wires with a porous insulation that allows a small amount of ambient air to reach the sensor element inside. This design ensures the sensor can compare the oxygen content of the exhaust gas to the ambient air accurately. 2. Why Soldering is Problematic: • Heat Damage: Soldering wires can damage the porous insulation and the sensor’s delicate components due to the high heat involved. • Sealing Issues: Proper connectors and crimps are designed to maintain the necessary pathways for air to reach the sensor while also providing a secure, sealed connection. Soldering can disrupt these pathways, leading to inaccurate readings. • Mechanical Stress: Soldered joints are less flexible and more prone to breaking under the vibration and movement typical in a vehicle, which can compromise the sensor’s function. Explaining to Viewers: Here’s a simple way to explain it: Why Oxygen Sensors Need Proper Connections: Oxygen sensors help your car’s computer keep the engine running efficiently by measuring the oxygen levels in the exhaust. For these sensors to work correctly, they need to compare the exhaust gas to the outside air. How Does Outside Air Get to the Sensor? Some oxygen sensors have special wires that let a tiny amount of air through. This air travels through the insulation around the wires and reaches the sensor inside. This comparison between the exhaust gas and outside air helps the sensor generate an accurate signal that your car’s computer uses. Why Not Solder the Wires? • Heat and Damage: Soldering uses high heat, which can damage the special insulation and the sensor itself. • Sealing: Proper connectors are designed to keep the air pathways open while also sealing the connections. Soldering can block these pathways, leading to bad sensor readings. • Flexibility: Cars move and vibrate a lot. Soldered connections are stiff and can break more easily. Properly crimped connections are more flexible and durable. Using the right connectors and crimping tools ensures that the sensor can breathe and work correctly, keeping your engine running smoothly and efficiently.

[@scottmasterson2594]

When I put the wires into the connector and tighten ends the wire will fall out. I put the wire next to stud in connector, is this wrong. what holds the wire in

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@BoschAutoNA]

Hello. Thanks for reaching out. Based on the description, ito me like you are describing the posi-lock as a “stud.” The posi-lock is actually a 3pc assembly. Each end has a nut that has to be unscrewed, wire inserted, and then nut tightened back down…this will prevent the wire from pulling out. The critical part of the video is from: 1:31: Posi-lock closed (before wire insertion) 1:33: Posi-lock open (nuts unscrewed on both ends, still no wire inserted) 1:35: Wires inserted (nuts unscrewed) 1:42: Posi-lock nuts tightened (as the nuts are tightened, the wire is “pinched” between the middle part of the posi-lock and the posi-lock nut). If you are not holding the wire in place while tightening the nuts on the posi-lock, the wire is probably just slipping out.

[@xavierrochas]

Works great on my Mercedes Benz S500 4matic W220

[@macrologic7221]

Yeah, well what if you have 5 wires like me? How does that work?

[@leeman1525]

+Andrew Kelly I have similar problem but mine does not even have two same color wire on the original. what did you end up doing on yours to get it to work?

[@normahernandez4771]

did you ever find which goes to which? I'm having a hard time with mines can you please help out?

[@AgustinCortes]

I have a 2007 VW and I also have 5 wires, I cannot find anything to relate to.

[@eziomo7685]

@@AgustinCortes Same problem here. Obviously not a "Universal" replacement. Retailers need to stop selling us fraudulent representations.

[@ILuvShaneDawson131]

Did you ever figure it out?

[@cyrilguer1115]

Hello Bosch. in order to match the sensor wires to my vehicle can you help identify the matching pairs? 2004 Jeep Wrangler 4 Cylinders 2.4l. The 4 wires on the car side are: Black with blue stripe Black with Green Stripe Black with Red stripe Red with black stripe

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@BoschAutoNA]

Hi Cyril. Thanks for reaching out. Every Bosch universal oxygen sensor comes with a set of instructions with a color chart that helps customer’s match the right color wire. If you provide me your email address, I can send you the pdf versions of these installation instructions.

[@cyrilguer1115]

@@BoschAutoNA thanks but I have the instruction for the sensor. Unfortunately the one that came with the sensor does not provide the info for my vehicle. The pdf on your website is the same. Unless you can tell me precisely the matching for a 2004 Jeep Wrangler 2.4l?

[@BoschAutoNA]

Hi again. I was able to get specific info for your vehicle. If you can provide me an email address, I can send you the images. I can't post images here.

[@cyrilguer1115]

@@BoschAutoNA thanks to send to [e-mail]

[@puskiimre120]

Thank You Bosch!

[@mohdsya7408]

Hard to explain but only professional will understand regarding the ‘oxygen pass through wire’... thumbs up for bosch

[@BoschAutoNA]

You're most welcome!

[@josecepeda4431]

Here’s an explanation for everyone regarding no the oxygen passes through How Oxygen Sensors Work and Why Wiring Integrity is Crucial Understanding Oxygen Sensors: Oxygen sensors are vital components in your vehicle’s exhaust system. They measure the oxygen levels in the exhaust gases and provide data to the engine control unit (ECU). This information helps the ECU adjust the air-fuel ratio for optimal combustion, which improves performance and reduces emissions. The Role of Wires and Connectors: 1. Air Passage Through the Sensor: • Ambient Air Reference: Oxygen sensors need a reference to the ambient air to compare it with the oxygen levels in the exhaust gases. This reference air is crucial for the sensor to generate an accurate voltage signal. • Porous Wire Insulation: Some oxygen sensors have wires with a porous insulation that allows a small amount of ambient air to reach the sensor element inside. This design ensures the sensor can compare the oxygen content of the exhaust gas to the ambient air accurately. 2. Why Soldering is Problematic: • Heat Damage: Soldering wires can damage the porous insulation and the sensor’s delicate components due to the high heat involved. • Sealing Issues: Proper connectors and crimps are designed to maintain the necessary pathways for air to reach the sensor while also providing a secure, sealed connection. Soldering can disrupt these pathways, leading to inaccurate readings. • Mechanical Stress: Soldered joints are less flexible and more prone to breaking under the vibration and movement typical in a vehicle, which can compromise the sensor’s function. Explaining to Viewers: Here’s a simple way to explain it: Why Oxygen Sensors Need Proper Connections: Oxygen sensors help your car’s computer keep the engine running efficiently by measuring the oxygen levels in the exhaust. For these sensors to work correctly, they need to compare the exhaust gas to the outside air. How Does Outside Air Get to the Sensor? Some oxygen sensors have special wires that let a tiny amount of air through. This air travels through the insulation around the wires and reaches the sensor inside. This comparison between the exhaust gas and outside air helps the sensor generate an accurate signal that your car’s computer uses. Why Not Solder the Wires? • Heat and Damage: Soldering uses high heat, which can damage the special insulation and the sensor itself. • Sealing: Proper connectors are designed to keep the air pathways open while also sealing the connections. Soldering can block these pathways, leading to bad sensor readings. • Flexibility: Cars move and vibrate a lot. Soldered connections are stiff and can break more easily. Properly crimped connections are more flexible and durable. Using the right connectors and crimping tools ensures that the sensor can breathe and work correctly, keeping your engine running smoothly and efficiently.

[@mohdsya7408]

@@josecepeda4431 dude you're greeat! But not everyone study physics. I hope they will understand

[@richardking6066]

Mine came with a chart - but the colours are very hard to distinguish. But I found this video which shows the various colour combinations quite clearly! kzbin.info/www/bejne/iZOcZHupfqami7s

[@ILuvShaneDawson131]

What of my old plug has five wires? This only comes with 4. Kinda in a bind now. Wasted my money.

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon.

[@BoschAutoNA]

Hi Connie. Can you answer a few questions that will help us respond to your inquiry? What is the year, make and model of your vehicle? What is the part number of the sensor you purchased? Where did you purchase the sensor? Please provide the name of the retailer or online entity.

[@vcastellinolive]

Will this sensor work if I don’t have any clips to connect the sensor so I mean we’re I would connect the sensor has be cut so it would need to be spliced. Would this sensor help me by connect the o2 sensor to the other wires useing what I have in the kit

[@vcastellinolive]

I mean my wiring harness has been cut

[@RS-ft7nv]

$30 bux cheaper for this garbage wish I went for the one with the plug already. We'll see how it works on my toyota

[@highthai7]

How did it work?

[@l3000c]

@@highthai7 Probably just fine. No real difference between any two proper O2 sensors. Bosch also invented the O2 sensor, so pretty sure they know what they are talking about, and how to make one.

[@LewisRenshall]

I have five wires- what should I do?

[@BoschAutoNA]

Thank you for taking the time to reach out. We've forwarded your inquiry to consumer care, who should be reaching out to you soon. In the meantime, can you provide me the year, make and model of your vehicle?

[@LewisRenshall]

@@BoschAutoNA 2001 VW Polo 6N2 (AUD engine code)

[@edomar2r]

Is intended for life guys, deal with it.

[@motrhead69]

THIS IS TOTALLY WORTHLESS! if you pay for a premium part such as BOSCH you shouldn't have to rely on utilizing you old connector body....should be plug N play

[@jakestar77]

If you buy a Bosh O2 sensor that has both ends, they are much more expensive than these. This is the budget option with still a quality sensor.

[@volpage77]

Yeah bullshit I’m over here doing electrical fuck this

[@traesvision529]

@@volpage77😂😂

[@traesvision529]

@@volpage77me too bro. I had to take a break real quick cause I already had trouble getting the sensor off lmao.

[@jamesbarratt593]

Well every damn video says there are two white wires and these are the heater wires, only on my Golf thats rubbish. I have one white, one grey, one red, one yellow and one black. So where in that os two white wires? This system of yours sounds a lot of grief bosch.

[@BoschAutoNA]

Hi James, We apologize you are having difficulties installing the O2 sensor. What is the year, make, model and engine of your vehicle?

[@BoschAutoNA]

Based on the information you provided, it sounds like you are looking to replace a Bosch wideband LSU 4.2 or 4.9 five-wire sensor with a four-wire switching universal sensor. However, a wideband sensor can’t be replaced with a universal sensor. Does this help?

[@jamesbarratt593]

I bought a replacement sensor from Eurocarparts for my Golf 2.0fsi year 2006. I noticed straight away the wire colours never matched the colours of the loom in the car, but forgetting this I also noticed the sensor had five wires going into a plug which had six pins. This plug connects to the plug of the cars loom where there are six wires connecting to 6 pins. Scannerdanner on youtube said he was concerned about this. I have two codes P0037 and P0050 referring to the heater element. Im wondering if the loss of one wire is the reason for this. Believing that the ECU switches the ground side to regulate the heat within the sensor.

[@reymy99]

Bosch Auto Parts, I have the same problem with a 2013 Hyundai Veloster Turbo oxygen bank 1 sensor. My factory has 5 wires, white, red, yellow, black and gray while the factory one has 4. So for what I understand is not recommended to used the universal 15733 with the factory wiring on the Hyundai. Is it better to go with the oem item?

[@sheldonbosch7340]

Do I get the family discount? Lol

[@Another_Random_Dave]

I had one of these for an 03 Ram 1500. Nothing but a bad overpriced experience. I wired it EXACTLY as called for my vehicle. Once a week I’d get the same trouble light. I’d reset it and wait another week. Did that for over a year. Gas mileage sucked too since it was running rich.

[@BoschAutoNA]

We would like to look into your issue. Please fill out our form so that we can get you in touch with our product specialists. spr.ly/60521Jnlr

[@1marcelfilms]

whut is this?

[@ytryrtytrgfhfhfu9329]

Fucking Bosch !!

[@HelloDocMode]

These are garbage, just buy oem plug n play. Customer wasted 100 bucks on 2 of these

[@MarquetteBitchs]

NGK

[@FadedHolySoldier]

This O2 sensor sucks!!!!!

[@ramonholland1165]

Yeh mine is defect after 2 years…that’s way to short…but i bought it again cause i have to connect the same panel

[@ypdmv7420]

This is stupid bosch!