Auto Hold Retrofit

[absentmathis]

Originally Posted by werdn

After I did the retrofit, the car started making noise after around 1 month when engaging the brake, and the actuator went out after 2 months (never used the HOLD button, did the retrofit because I did not like blank buttons). Not sure if they are related, as the HOLD switch is for cars after 10/2007, and mines is 03/2007.

Also, after manually releasing the parking brake, the HOLD button does not work anymore. This shows that the HOLD button probably uses the parking brake.

I will be replacing my unit with an Uro one. Hopefully that holds up. It also has a warranty. I will keep using the switch, but if the actuator breaks again, I will replace it with one without the HOLD button.

Did you need to do coding after fixing your actuator?

Unrelated. Auto hold does not use the parking brake, although a broken parking brake does disable auto hold. I was under the same impression initially, which it is slightly confounding given it uses the same button. Your parking brake module just failed. Flukey timing. I got mine rebuilt for $150 or so and it’s worked fine for 5 years. Auto hold system is separate. I do believe you need coding if you don’t reuse the same parking actuator but not 100% sure.