Audi A4 (B8) repairs. Episode 2, Front ABS sensor replaced.
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- Опубликовано: 27 июл 2019
- When I bought my new 2008-2016 Audi A4 it had an ABS warning and parking brake fault warning on the dash.
After having it scanned by a local garage (it would be great to have my own fault code reader) it was diagnosed as the front nearside wheel speed sensor.
This video shows what I did to change the sensor for a brand new unit.
Disclaimer.
This video shows how I did the job. It is your responsibility to keep yourself safe if you choose to tackle this job yourself. If you dont think you can safely complete the job then please contact a professional.
I cannot be held responsible for any damage you cause to yourself, your car or anybody else.
#AudiA4 #ABSsensor #CarRepairs #AudiA4B8 #WheelSpeedSensor #Howto #DIYrepair 
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If you found this video use full and it saved you spending a lot of money at a main dealer or garage then I would be really grateful if you could drop me a wee donation using the super thanks button and help me make more of these videos. Thank you all, Dave.
Hi what is the abs sensor size is it 35mm or 68mm
@@hasanayat5516 Sorry, I didnt measure it before fitting and now its fitted I cant measure it.
I love how in how-to-do tutorials everything is easy and smooth. My sensor was stuck!!!!!!
They do get stuck very easily after years of road grime and damp. If you need to drill out the old sensor be very careful not to scratch the magnetic backing on the wheel bearing or you will need to replace that as well.
Brilliant mate, and Top music choice on your dash 🎶🕺
Grazie ottimo video
No messin’ great vid.
very helpful thank you
tip! put some grease on the mating surface before putting the new one on :) you can thank yourself next time you need to change it.
It got a smear of copper grease before it was reassembled. Im hoping I dont need to change it any time soon but it was coated before it was put back just in case.
Great video. I bought a scan tool and got a code for the front right speed sensor so I replaced the sensor. I then noticed that I had live data available with the scan tool and tested the sensors and they’re all working but I’m still getting the front right wheel speed sensor code. I’ve cleared the codes and it still comes back. Any suggestions? Thanks again!
The rear face of the wheel bearing has a thin magnetic coating, bit like old cassette tape and its quite fragile. It is possible to scratch the surface if you needed to use tools to remove the old speed sensor and the scratch will confuse the new sensor and throw up a fault code. Double check your wiring and connections but you may need to change the wheel bearing on that hub.
@@AstonishingGlasgow I appreciate it, I’ll take a look at it when I get off of work. I’m hoping it’s nothing too complicated. Thanks for the fast response.
Lol no way the old sensor just slipped out with a wiggle like that!! these seize and normally need drilled and reamed out
I must have the magic touch.
Hello i have the same car, I have all the same errors on my dash and read online that it could be the battery, what do you think?
I have not heard that one. I have had a low battery warning and a flat battery due to the corona lock down and the battery had its own warning message. No sign of ABS warnings.
Hey! My audi a4 has the same thing at the moment. When coming to a slow hault and braking did you feel a slight judder
I didnt notice a judder if in honest and didnt brake sharp enough to test the ABS. The front offside sensor is the same as the rear nearside and vice versa but you will need to scan the car to find out which one is faulty and when you do change it, expect it to be seized into the hole, remove it carefully to stop it breaking when you remove it.
@@AstonishingGlasgow thsnks! Will get it checked out
Hey! i have the same problem, when i brake a little i feel a judder. Do you know what your problem is?
@@woodpig41у меня тоже вибрация, и посторонние звуки.
Вы нашли в чем причина была выбрации?
Did water ever make a difference to you? I get the same (and more) errors from the car and I have an error about an ABS sensor on the car. Only happens when its wet though!
Nope. The fault I had was on constantly and since replacing the sensor has never re-appeared in any weather and being from Scotland means it has had plenty of wet weather testing. You should maybe follow the wiring back from the sensor and see if the insulation is damaged anywhere and check the plug connector to make sure no water is getting in to cause a false reading.
My one is playing up from all the rain we're having. Just changed the sensor. Hoping it fixes.
@BTJustice why didnt you clean out the hole that the sensor goes into before putting the new one in?
Because there was nothing in there to clean out and sticking anything in there thats not the sensor runs the risk of damaging the magnetic strip on the wheel bearing that the sensor reads.
@@AstonishingGlasgow they say clean the abs ring and use compressed air i dunno
On older cars with toothed reluctor rings I would clean the dirt from the teeth but on this car its a smooth magnetic strip on the back of the bearing so I chose to replace without pushing any dirt into the hole or disturbing any particles that could end up scratching the surface of the magnetic strip.
I got U0121 error code abs lost communication, is that similar to your issue?
Sorry, I dont know. I dont have a fault code reader of my own so had the car scanned by a mechanic friend who only told me it was a front left wheel sensor fault.
Hi, i am having same issue with mine, but wanted to ask did yours ever have these symptoms aswell, judder a bit or when you went to accelerate you had no throttle response, start up tick over for few seconds then cut out intermittently?
I have never suffered a judder and the stall out symptom thankfully.
Hi, I have exactly the same problem and exactly the same car :)) I am planning to have it scanned tomorrow and see what sensor is faulty, wanted to ask where did you buy the sensor and it’s an aftermarket one or you got it from Audi dealer? Thanks
I bought a Bosch sensor from an online supplier and a cheapo from Ebay to try. The cheapo from ebay is working fine so you might want to try that? Two from ebay are cheaper than the cheapest bosch one I could find so if you can be bothered changing it again in the future (as they might not last like a Bosch part) it might be worth the saving.
P.S. front right sensor is the same as rear left and vice versa.
Thanks for the advice, hopefully this will fix the problem, I am worried tbh as I am getting more errors than you, I get: Abs, esp, parking brake, Tpms- tyre pressure monitor system and headlight adjustment system car is equipped with factory bixenon lights
I dont get the TPMS warning as I dont have it fitted to the car and I only have Halogen lights so wont be fitted with self levellers. Thats probably why I dont have those warnings.
Sorted, had to replace the rear right abs sensor and the wheel bearing and no more warnings on the dash now, very happy as the gearbox was reacting very strange when braking and I was very worried thinking about a potential problem with the gearbox, thanks for the advices!
Was your speedo not working at the same time sensor was broken
My speedo was still working when the sensor was faulty.
Was the parking brake malfunction due too the abs sensor as well
Yes. The automatic handbrake will not work if there is a wheel sensor fault.
@@AstonishingGlasgow ok well I’m sorting my one out today so hopefully it’s the same fault
Hi guys..... have an audi a4 b8.. does this sensor pick up on reluctor ring that's on the cv joint? Just going to attempt to change drive shaft with new yet they haven't sent a new reluctor ring as they have said sensor picks up on the wheel bearing and hub.
There response below
Hi the shaft is correct, Audi have removed the ring from the drive shaft, the abs is operated from the wheel bearing and hub on the later model, we have checked your registration proceed and fit, your removed shaft will be the same, also your bolt on newer models is re used not like earlier models.
What they are saying is correct. There is a thin magnetic strip on the back of the wheel bearing that the sensor reads and be careful not to nick or scratch that surface or the abs fault will reappear.
@@AstonishingGlasgow thank you, appreciate your reply
Does anyone know if its the same on the a5? I think mines a b8
my a5 has simliar issue, cost 6000 usd to get a new abs computer from audi here.
Ouch! Im glad my wheel speed sensor only cost £40 now.
Ill buy a odb2 scanner and check myself
Cuál era el código de error. Te agradecería si lo cometas. Gracias
Lamento, mas o meu carro foi examinado numa oficina local e tudo o que me disseram foi que o sensor frontal esquerdo estava com defeito, por isso não recebi o código.
@@AstonishingGlasgow gracias por el dato. En el VAG me muestra el código U17100.
Am I right in saying you had to replace the wheel bearing as well? Did the sensor change work for a while or did the faults remain and you changed the wheel bearing to fix it?
I bought the car with the sensor fault. The reason the sensor came out so easily is because the previous person had scratched the back of the bearing and damaged the magnetic surface so I needed to change the bearing. I did make a video on changing the bearing and sensor on the other side if you look through my other videos.
And deleted errors by Vag after replaced the new sensor?
The fault code cleared itself once the new sensor was fitted.