Replaced Three ABS/ ASR Mount Bushings

[emerydc8]

It took about 15 minutes and all you need is a 10mm 1/4" drive socket, a 2" extension and a 10mm wrench (plus the torx bit to get the top cover off). You don't have to take the unit out. The bracket is designed so the bushings will slide out if they are all three loosened.

I cannot believe the difference when I start the engine. The bushings (part no. 123 987 00 39), were 84 cents each at Parts.com. It's well worth the time if they are the originals. As you can see from the pictures, mine were hardened and cracked.

 

[gerryvz]

Can you give some background as to the symptoms you were experiencing, and the diagnosis process by which you isolated these as a problem?

Haven't seen much about this before so I'm very curious....

 

[emerydc8]

I was experiencing the symptoms described in this post.

http://www.500eboard.com/forums/showthread.php?3161-ABS-ASR-Pressure-Switch

I could tell the pump was transmitting noise into the body of the car because it was noticeable when it shut off (why it's shutting off I still don't know, but I am getting a dtc 21 on socket 6). In any case, at least I don't feel the vibration of the pump when I start the car.