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2007 3.2 VR6 Roadster
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Over time, the natural oil and dirt from your hands will accumulate and pocket lint and dust will end up inside the key fob making it look a bit grungy. It's pretty simple to clean it up and depending on how dirty yours is, may or may not take this much effort. Since the lock, trunk release and unlock buttons are all a single piece of rubber, nothing can get through it and into the electronics. Most of the dirt will collect in the key slot, key ring recess and inside the battery compartment.

For starters, once you have it opened up, use a can of compressed air (office duster) to get the lint and fine dust particles out of the fob. For the bulk of the cleaning, I used IPA and some cotton tip swabs to get most of the dirt off the surfaces. IPA works well for dissolving grease and oils and evaporates without leaving any residue. You can also use it on the battery contacts.

I also like to use Meduiar's PlastX plastic polish as it is a very mild abrasive, and as it's silicone-based, compatible with the plastic and metal parts. After going over it with IPA, you can give all the outer surfaces a nice clean and polish. And don't forget to give the key and chrome trim a good clean and polish too!

If the case is cracked, or the buttons badly worn, you can buy replacement fob kit from Amazon or eBay. You can follow this YouTube to see how to remove the PCB and make the exchange between your old case and a new one -

How to Replace Audi 3-Button Flip Key Shell

If you don't want to go through the hassle of replacing the case, you can always get a nice silicone cover for it -

kwmobile Car Key Cover for Audi - Silicone Protective Key Fob Cover
https://www.amazon.co.uk/kwmobile-Car-K ... B072HH51YN

Tools -

• MT-5 & MT-6 Torx
• Jewlers flat screwdriver
• Can of Office Duster
• Isopropyl alcohol (IPA)
• Meguiar's PlastX Cleaner & Polish
• CR2032 Coin Battery (might as well replace it while you have it open)

KeyFob and Tools.JPG

Access to the Battery Compartment -

Open the key so you can access the release tab on the inside of the key slot. Start by using a flat jewelers screwdriver to gently pry the rear of the case inside the key ring recess. Not too much, just enough so it's loose. Then look for the release tab inside the key slot and push it upwards. Then pry the cover completely off to access the battery compartment.

Key-Fob-Open1.JPG

Key-Fob-Open2.JPG

Key-Fob-Open3.JPG

[smiley=stop.gif] CAUTION! The key is spring loaded so it will want to "unwind" as you disassemble it.

Access to the Internals -

Once the battery cover is off you can use the MT-6 to remove the larger screw near the Audi logo. Then use an MT-5 to remove the two smaller screws near the key ring recess. With all three screws removed, carefully take the two halves apart.

MT6x1_MT5x2_Screws.JPG

Both Halves with Key and Button.JPG

The chrome side trim can also be removed by carefully prying from the case half.

Chrome Detail Removed.JPG

If you want to replace the button pad because the icons are worn, this is the part of the disassembly where you can remove the white plastic backing, rubber seal and button pad. Just follow this YouTube link -

Audi TT 8J Mk2 Replace Fob Buttons
https://www.youtube.com/watch?v=mE0jas4 ... e=youtu.be

KeyFobButtonReplacement.JPG

The PCB is well sealed with a gasket around the entire perimeter of the board. It's plastic-welded in place at two spots and there's really no need to remove it unless you're swapping out the case.

KeyFobPCB.JPG

After getting into the nooks and crannies with a cotton swab and IPA, you can use PlastX to polish the outer surfaces of the case, key, button and the chrome trim.

Reassembly -

When you put it all back together, you'll need to wind the spring to the key is under tension. Start by placing the lower spring tab into the slot on the PCB half of the fob.

Lower Spring Tab in Fob.JPG

Then place the button on top of the spring and rotate it until seats into the spring (note the detail inside the button).

Uppler Spring Tab in Button.JPG

Now place the key onto the button and rotate the key a full 360°counter-clockwise plus another 180° until the key is in the closed position. Do not over wind the spring. At the same time, pressing the key downwards. When you're finished the key will be in the closed position in the key slot. I found it easier to hold the key in place with one hand, and rotate the fob on the table.

WindingTheKey.JPG

While holding the key closed, place the other half of the case on top and carefully press the two halves of the case together. Don't force it! If everything is lined up properly, it should go back together very easily. While holding the two halves together, press the key button to see if the key pops out. If it only comes part way out, you haven't wound the spring enough. Repeat the winding process again until the key action is correct.

Spring Not Wound Tight.JPG

If the key pops out as it should, continue to hold the cases together and reinsert the three screws. Replace the battery (CR2032) and snap the battery cover back on. Press the release button and double check the key releases and locks into position. Now press all three of the lock buttons and check the LED. It should be flashing which indicates it's all working properly.

KeyFob-08.JPG
 

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