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Faulty rear parking sensor

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Andy27168, Apr 30, 2013.

  1. Andy27168
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    Andy27168 Member

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    [Apr 30, 2013]
    Hi,
    Recently having my A4 Cab. serviced at a local Audi specialist, they carried out a diagnostic on the front and rear parking sensors. It showed a faulty rear inner sensor.
    They quoted me £202 to supply a genuine Audi sensor, paint it and replace it.
    Having spent a lot of money recently buying the car etc, I would like to attempt this myself, could anyone give me any pointers, does the sensor replacement require the rear bumper to come off, if so how does it come off? or can I simply gain access to the sensor from underneath, any help or advise on this will be greatly appreciated.
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  3. tuffy
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    tuffy Member

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    [Apr 30, 2013]
    Hi Andy
    Not quite what you're asking but..... i fitted parking sensors to my Avant and yes, the bumper had to come off. I may be wrong but it would probably be too difficult for anyone to explain how to remove it as there are several nuts a clips in several location, only takes about 30 mins to remove
    There may be a 'how to' on here, if not google it.

    You may know which one it is thats faulty, but if you dont.....turn the ignition on, put it in reverse and put your ear to each sensor, you should hear a clicking noise coming fron each sensor, if you cant.....thats the knackerd one

    Hope this is some kind of help
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  4. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Apr 30, 2013]
    i know on the saloon you can just get to the inner sensors and change them without bumper off
    my cabs on the ramps friday so ill have a look see if it can be done.
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  5. Andy27168
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    Andy27168 Member

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    [May 1, 2013]
    Hi,
    Thanks fpr the replies,
    Tuffy I had heard of the clicking sensor diagnosis but to be honest I always thought it was a bit of a myth to be honest, I,ll try it though see if it confirms the garage diagnosis thanks.
    Bez101, if you could have a quick look at yours when its on the ramp friday it would be really appreciated :) Thanks
    #4
  6. the_cueball
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    the_cueball Active Member

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    [May 1, 2013]
    I done 2 of mine on the B6.... got them off a nice chap on Evil bay land for £40 all in... (I think Audi was £100 each for them!)

    then I painted them myself, try and get the coats as thin as possible so that it doesn't confuse the sensor...

    the rear bumper has to come off, or at least undone to get a hand up and play about trying to replace them.... I just gave it all to my local Indy when it was in to get the water bottle fixed....
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  7. tuffy
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    tuffy Member

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    [May 1, 2013]
    It really does work mate. I trapped a wire when I put my bumper back on which caused them not to work properly, I found out which one by the clicking test
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  8. the_cueball
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    the_cueball Active Member

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    [May 1, 2013]
    forgot to say, yes the clicking test does work!!!

    even my Indy didn't believe me, until I told them which ones weren't working while waiting for them to plug their computer into the car... lol
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  9. Dpat
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    Dpat New Member

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    [Oct 5, 2013]
    Hi all
    i need to replace a rear parking sensor!! I can reach the one I need to change from behind, but not sure if it should just pull out (from behind) I don't want to force it and break it!!!!!!!
    #8
  10. ricostuart
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    ricostuart Active Member

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    [Oct 5, 2013]
    there are two plastic flexible lugs that hold the sensor in place. They are very flexible and easy to move, but if you are at the wrong angle (not removed/loosened bumper) then they can be a pita. Also the sensor has to come through backwards a distance which means access is harder to get it out, or to uncouple the wiring. It really is much easier to remove the bumper. The rear on the saloon is 3 bolts each side from inside the boot and the wheel arch liners too. doesnt take long at all.
    #9

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