MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Lucastheone92 on February 02, 2018, 08:14:07 am

Title: Cycle ABS pump for front brakes
Post by: Lucastheone92 on February 02, 2018, 08:14:07 am

Is it necessary to cycle the ABS pump via vagcom when installing a new R32 front brake kit?

Title: Re: Cycle ABS pump for front brakes
Post by: Dan_FR on February 02, 2018, 11:06:17 am

No.

Only time its really needed is once the entire system has been drained, even then its not really needed with a pressure bleeder

Title: Re: Cycle ABS pump for front brakes
Post by: Shoduchi on February 02, 2018, 04:48:07 pm

Just do it if you still have a spongy brake pedal after bleeding the brake calipers well.

Title: Re: Cycle ABS pump for front brakes
Post by: pudding on February 02, 2018, 06:05:35 pm

It's a good idea to cycle the ABS whilst flushing new fluid through.   People rarely activate the ABS and brake fluid being hygroscopic, the water can corrode the ABS pump pistons, so it's well worth agitating the pistons to shift the dirt and corrosion.   

Not a problem for people who stick to the 2 year brake fluid service, but people leave brake fluid in there for 10 years will have problems.

It was actually a requirement on the MK3 platform Golf.  Dealers were instructed to do it from VW Germany.  But these days they just don't bother unless asked.