Note** This is on an 01TT without the Bose.

Tools needed are 10mm wrench or 1/4 ratchet with a 10mm socket. Either will work here.

Remove your daughter or Son's booster seat.

Lower the rear seats down.



Note* If you have a Bose Sub you will not have this lower shelf visible. The box will have to be removed. If you look at the left and right of your sub box you will see air horns or vents. Pull these out and in the hole you will see a Torx bolt. Remove the bolts from the left and right vents and pull the box out towards the front of the car. It should be removed from the back seat area to access the plates and ECU clearly.

Remove the lower carpet section. (on the Bose Sub cars there is three pieces of carpet, only two need to be removed.) You can see from the pictures the carpet is foam backed and is not held in with anything other than pressure. Simply pull from he front or back and remove the lower carpet.


There are two 10mm wrench size bolts and a 10mm nut. As located in the pictures remove these fasteners on the left side only.





Flip the metal panel up and remove the 4 10mm nuts from the ECU.


Lastly you will need to remove the 5 plugs from the ECU. Unplugging the gray one first you will see they latch at an angle and you must pull the gray one first then remove them working to the opposite end. Install is exactly the opposite. The last plug you pulled will be the first one back in.

That's it...Have fun!!