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ABS Pump

Discuss problems you have had or are having with your Z4
DennisW
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ABS Pump

Post by DennisW » Thu Jun 08, 2023 9:52 am

My first run out after winter lay-up produced the three warning lights indicating a problem with the ABS system. My local garage diagnosed a problem with the ABS pump. They sent the pump away for refurbishment but on collecting the car the brakes felt very spongy. I took the car back to the garage assuming it was just an airlock problem which they confirmed when I collected the car but they advised that the brakes would not perform as before because of the refurbishment! They are still spongy! Is this a common problem?

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ABS Pump

Post by enuff_zed » Thu Jun 08, 2023 10:00 am

DennisW wrote: Thu Jun 08, 2023 9:52 am My first run out after winter lay-up produced the three warning lights indicating a problem with the ABS system. My local garage diagnosed a problem with the ABS pump. They sent the pump away for refurbishment but on collecting the car the brakes felt very spongy. I took the car back to the garage assuming it was just an airlock problem which they confirmed when I collected the car but they advised that the brakes would not perform as before because of the refurbishment! They are still spongy! Is this a common problem?
What???
Take it somewhere else, that is a ridiculous statement.
Did they do the full bleed, using the diagnostic tools to activate the ABS?
If not then that is your problem.
But whatever the cause, for a garage to tell you that is ludicrous!
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Post by pvr » Thu Jun 08, 2023 11:20 am

Wow, just wow .... :x
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ABS Pump

Post by enuff_zed » Thu Jun 08, 2023 12:14 pm

DennisW, if you give us the area you live in then hopefully a forum member will be able to recommend a garage with at least some degree of knowledge!
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DennisW
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Post by DennisW » Fri Jun 09, 2023 8:11 am

Thanks for your responses. I am in Edinburgh.

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Post by enuff_zed » Fri Jun 09, 2023 8:17 am

DennisW wrote: Fri Jun 09, 2023 8:11 am Thanks for your responses. I am in Edinburgh.
Hmmm, don't know anyone that way personally?
Could amend the thread title 'ABS Pump help needed - Edinburgh area' ?
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Post by Southwestz4 » Fri Jun 09, 2023 8:23 am

Thats bad ...it amazes me that garages think that they can get away with that sort of bull***t, I used to work in a small village garage as a lad but would never let a car leave until it was 'right ' , needless to say I do all my own car stuff now ! ...hope you get it sorted.
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DennisW
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ABS Pump

Post by DennisW » Fri Jun 09, 2023 11:17 pm

So, can it be confirmed that getting your ABS pump reconditioned and re-programmed should not affect the braking system in any way?

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Rucky
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Post by Rucky » Sat Jun 10, 2023 10:13 am

Not sure which model you have but in my experience with both a 2004 and 2007 E85 whoever bleeds the brakes MUST use the INPA Brake service programme or equivalent to activate the pump during bleeding or you will always have spongy brakes.
I repaired my own pump on the 07 3.0si with a brush and bearing kit ( Its posted on this site) because the system gets air in it during pump removal it does not bleed properly and you get very spongy brakes .
It was for this reason that I bought a laptop and installed the INPA programmes. First time I ever needed a laptop to bleed a set of brakes.

Ask them if they ran an ABS activation programme during bleeding? Which one and with what - If not why not?

I doubt its the refurb ABS pump and as far as mine were concerned there is NO coding required after a pump change.

(Things may be different on later models or ABS pumps.)
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Post by Rucky » Sat Jun 10, 2023 10:19 am

04 2.5i Titan silver - 1st Z4 now sold on
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DennisW
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Post by DennisW » Sun Jun 11, 2023 7:17 am

Hi Rucky, Thanks for your info! It's a 2007 3.0Si that I have so I will now ask my garage if they have followed the correct procedure! Cheers.

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Post by smorris_12 » Sun Jun 11, 2023 9:05 am

DennisW wrote: Sun Jun 11, 2023 7:17 am I will now ask my garage if they have followed the correct procedure!
If that isn't the very definition of optimism!
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Post by enuff_zed » Sun Jun 11, 2023 10:25 am

DennisW wrote: Fri Jun 09, 2023 11:17 pm So, can it be confirmed that getting your ABS pump reconditioned and re-programmed should not affect the braking system in any way?
Absolutely!
Any company that reconditioned one and it ended up like that would soon be out of business.
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DennisW
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Post by DennisW » Sun Jun 11, 2023 6:53 pm

Thanks for all your replies so far. I will post an update once I have spoken to my garage to give them a chance to explain!

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Post by Mr_E85Bim » Sun Jun 18, 2023 8:43 pm

I had my abs pump replaced a couple of days ago. I can confirm my brakes now feel different. But in a good way!

My indy had to activate the pump a number of times. As he described it, there was the mother of air locks in the system :rofl:

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