VW Passat B5 airbag light on error 01221 crash sensor. Fault finding and repair. 

Having owned a Volkswagen for about 6 months now, I've learned a LOT, and can 100%, without a shred of uncertainty, tell you what the problem is here. Answer- You bought a Volkswagen. Get rid of it and thank me later.

man .... that`s a lot of work , in my numbers the charge for diagnosis , reading-writing the eeprom and open the airbag sensor, system final check , cost more than that Passat B5 old car .... but yet the repair information is priceless , thank you! :)

Super good job. It is sad that car manufacturer put in all these coding and crap. Any sensor with the right part number should do the job, without special coding crap. If the coding is for calibration, each sensor should have its own data, not the module itself. I guess is for security, yeah the financial security of the manufacturer.

Very good video! I have the same problem with one Passat. I will probably do the same: copy eeprom from good one to faulty side. But.... with all due respect to you - i think this solution is a litle bit wrong (sorry :(). When you cleared crash - you know exactly that you deleted unnecessary data like speed of impact, force of impact, numbers of airbags deployed etc. But in sensor eeprom I think is writed specificaly data which is closely related to the physical data of the sensor! For example: linearisation of sensor inside, threshold of working area. But this is my opinion.

To save on time. Couldn't you have swapped the 2 sensors over at the beginning to prove fault would move to other side and clear on drivers side.

Honest channel, with a lot of information. 👍🇸🇮

The software on the artipad is pretty much identical to my launch x431 Again good video.

You are genius, I mean you deserve it. All love and appreciation to you from Iraq.

This helped a lot with the same fault on my car. Thanks to your efforts I knew exactly where to find the EEprom without having to de-pot the whole thing. Same as you, the EEprom was unable to be read by the car reporting back nothing in software. I tried a second hand one with the same result as you, it was picked up by vehicle but reported back 04 instead of 01 in my case. When I changed this value and re-flashed it was then being recorded by software as 05? Which I think must be some kind of error, as no matter what value I changed it to, it always recorded 05. I think as others have commented, there must be a checksum. I even copied byte for byte the code you had on your sensor screenshot and I had the same 05 being recorded in software. In the end, I did as you did, removed the passenger side one and used the code from that to re-flash the drivers side which worked perfectly. What is also worth noting is that the passenger side had a "40" recorded on the EEprom in bytes 8 and 9, but yet is read back as 01 in software. Whilst this must have some bearing, I think there is more to it than meats the eye! But without your efforts I wouldn't have bothered, so thank you!

Nice work . And by the way sweeping the ic from the original Airbag to uesd working one . Not working out . I get the same fault. So its software problem not hardware. And i have now the same problem what you did in this video. 4 crash sensors not correct . So uesd Airbag it will work without any problems just if its changed with original crash sensors for the same aftermarket Airbag.

Hard work this one but you got it mate... in the other video I had the impression that you’ve changed the 4.0 Id in three places, but you’ve created a dump from the original left hand side sensor and writing the whole data into the scrap yard one if I understood well 👍👍👍👍

Looks to me that the ArtiPad is a Launch. Looks extremely similar 🙄 I went thru the same process on a Skoda 6 months ago. Took me a couple of weeks on and off to sort it. Eventually did what you did with 2nd hand sensors. Even tried new sensors but TPS in their wisdom had sent me 2 sensors that were the wrong ones. Same numbers on the sensors as the original ones as well. Over priced German sh*t. No need for it at all.

You are just so good at detailed explanations , and exellent again !

I think crc byte must be changed as well...

You never cease to amaze me

I always am impressed with your perseverance the way you work, learn and teach. Could you have swapped the EPROM from the original sensor to the other? Thanks for all your videos.

Great video,hopes you and family are well

You know what, you always make me develope more interest. That was great.

hello can you do a basic setting on passat passenger seat, and where do we get the access code, for coding great videos as always

WoW amazing fix👍 Only a Master Tech like you can fix that😎 I wonder if there was an option with the Autel to rewrite sensor id? Thanks for sharing Bro👍 Looking forward to the id relearn video😉 Stay safe Bro❤

Crazy man very very clever,enjoyed the video.

I have a vw passat b5.5 from the 2005 - how can I know whic hreplacement sensor I need ?

Epic results! I have now watched this video 6 times over two days and I think I am beginning to understand that I don't understand much at all. Please help out with a couple of questions. I googled about the chips, xproc and Willem. Willem resulted in many products, some obsolete, and there seems to exist a probability of me buying the wrong thing for about 40 - 70 quid. I live on the edge of Europe, probably more here. 1) Would it make sense for me to even buy extra hardware to try and fix this? I have a gut feeling that a considerable amount of money will be spent on tools, but I may (or will) still inevitably get stuck. Perhaps for a person who has seen an EEPROM on pictures... it is a better idea to give up already and just buy the sensor from the dealer? (I do have interest to learn, but I have to pass inspection with the Passat this month or else. I think there's more than a month's worth of electronics that has to be learned.) 1.1) Basically, in short, do I have to buy moderately expensive tools (and, then, which ones?) or are there very basic easy ways to connect the chip to a computer? 2) If question 1 is a green go-ahead, how did you get the area so clean around the EEPROM? I doubt with a knife - that could damage the pcb. Thanks for the video and for your time if you can answer this! ** bonus question-idea: maybe consider making tutorials for beginners on how to connect similar chips to the computer and accomplish what you did. :)

You are the man,very clever guy. Keep up the great content 😁

Спасибо за информацию

Hello Sir and thank you very much for sharing your knowledge and work! I have a rather important question: If I buy the sensor directly from the manufacturer, will it already be set up according to my vehicle or will I need to flash the chip and the data as you did? Thank you in advance for your answer, and the time to have read my message :) ( I am French and I did not understand everything in your video due to my level of understanding in English )

Thats realy deep Luis.Messing with a crash sensor......dangerus thing i think

Thank you brother, it works 100%

Hi friend Why didn't you program it online and why old cars like 2008 don't need online to activate while new ones need on line

Sterling job mate just watched again 😋👍👍👍👍

it was me who Recognize you .

Just out of curiosity, what If you bridge the sensors, so the right wiring loom pulls the signal from the left sensor. Would that work?

Very useful video. I like it

Very very very professional

Everything is beautiful, but I would not like to have an accident with this car. Will you guarantee the owner that your action will not cause the pillows to fail in the event of an accident? And how does the insurer see the interference in the sensors and reject the claim for compensation?

This is exactly the same fault as mine shows, I clear it using VCDS but a few weeks later, the fault reapears. If I get a new one, does it have to be coded??

U did a good job.but I have an idea a little bit of saving time using vag crash data sensor rest tool and adaptation again Am use several times on vag group cars What do you think! Have nice Sunday..

Hi Louis! Very interesting problem and tricky solution. I have 2 questions: 1. Name the brand of chip eeprom. 2. If the part number matches, but the ID does not fit ... How to order the correct sensor?

Did you open the original faulty module and attempt to read the EPROM from there?

You are a MASTER!!!!

Do you still have that file from working 04 sensor? Would it be possible to upload it somewhere? I have read EEPROM data from the faulty sensor and copied it to one from scrap yard, but it now shows "faulty" on scrap yard one as well. So I guess, the content of EEPROM stores data about the status of the sensor.

Hi I have the same problem with other one used sensor it says its incorrect or no settings Because i cant do all things you do is there option to check sensor before buying it maybe i can be sure it the right one by comparing numbers or something like that or i need only to try it in my car and see is it the right

yes I now only you do this job very good

Super film. Pozdrawiam

Hi there! I am looking for any tricks or bypass for faulty oem sensor. Is it possible, may be with more than 1 resistor . Regards!

Launch pad 3 is same as this. I got the launch pad

Perfect, thanks... 👍

thank you for the clear explanation very good video...learning a lot from you and is become time that youtube reach to you ;-)

Topdon is just rebranded Launch scanner, maybe even more expensive.

K... where the F is the sensor located?

Question...i gave up no more question hahaha Too much work .

Great video.

If the car was sent to the dealership for repair, what procedure would they follow?

Your so good ....

Good job, but i think the maxipro is better than that tools

Everybody's running on low fuel lately....

wow your good

How to change sensor id.

Olá. Você é português?

I spent over 40usd for 2 sensors but they dont have the right id Im mad at myself i have spent money and do nothing Airbag light is still on

Top boy 👍

Should use VCDS. Better than this tablet thing.

WASTE OF MONEY TO BUY A TABLET.YOU CAN DO JUST AS WELL WITH OBD2 INTERFACE WIH BLUETOOTH OR WIFI.tHE BEST IS THAT THE INTERFACE HAS A LEAD WITH USB THAT YOU PLUG DIRECT IN TO THE LAPTOP OR A PAD.tHE REAL TOOL IS THE OBD2 SOFTWARE THAT YOU DOWNLOAD TO THE PAD OR LAPTOP.

First of all. I would really thank you for all of your efforts and for sharing your knowledge. Especially this high experience. I think this scanner is same to launch and i am pretty sure Maxi sys is much much better and they are incomparable between each other. The reason that i had a really bad experience with a launch which gave me wrong dtc and hard to connect to ecus and also very slow so i called it the 'faggot'. Really sorry for the expression. Again thanks a lot sir 😁

Please help me

how u knew its channel 9 16:29

Very impressive video but it doesn't feel right to "play"/repair security relevant things this way...

👌👌👌👍👍👍

A airbag sensor has a resister inside and a shock switch why did you not test it with a multimeter because its 99% just corroded connections as they get damp clean connections cover in grease give car back within a hour