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Author Topic: Faulty Brake Servo  (Read 9547 times)

Offline pudding

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Re: Faulty Brake Servo
« Reply #15 on: July 27, 2017, 04:43:49 pm »
One thing I forgot to mention about the brake servo situation is it's a punishment for being British.  Left hand drive Golfs don't have this problem as it's above the gearbox and easy to get out  :happy2:

Ahem............and Irish.

Sorry, it's a punishment for being a citizen of the United Kingdom of Great Britain and Northern Ireland.  Better?  :smiley:


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline mkmg76

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Re: Faulty Brake Servo
« Reply #16 on: July 27, 2017, 04:56:14 pm »
One thing I forgot to mention about the brake servo situation is it's a punishment for being British.  Left hand drive Golfs don't have this problem as it's above the gearbox and easy to get out  :happy2:

Ahem............and Irish.

Sorry, it's a punishment for being a citizen of the United Kingdom of Great Britain and Northern Ireland.  Better?  :smiley:

Oooooooooooh must not take the bait.

You sir, are going to hell!  :signLOL:

Offline chrism3

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Re: Faulty Brake Servo
« Reply #17 on: July 28, 2017, 10:11:34 am »
Ive been quoted £600 inc labour by a local specialist.

Might just get it done to be honest as its bugging me that the car isnt running correctly.

Re: reliability. I have had loads of issues with VAG products in the past, they are not very well built at all really. However the Mk5 GTi was the perfect car in my price range at the time. I could have got a bog standard 1 series for the same money but wheres the fun in that!?

Offline pudding

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Re: Faulty Brake Servo
« Reply #18 on: July 28, 2017, 11:18:55 am »
Yeah thinking of doing the same.  Got the part sat at home, so may as well put it to use.

Conversely, I've had zero issues with VAGs as in design/production flaws.  I've never been left stranded by the roadside with the bonnet up and steam pouring out of it.  The only time I've had problems were the result of modifications, so self inflicted issues! 

Dodgy brake servos only affects a tiny proportion of these cars, hence why only you and I, and perhaps one other person have discussed it if you trawl the forum.  The HPFP Cam follower is a sketchy design, but only an issue on modified cars.  Rusty wings is absolutely inexcusable in the 21st century, I'll give you that one!  Other than that.....just general wear and tear related faults.

By far the biggest problem, in general, with ALL of my German cars over the years - previous owner bodges / cheap skating.  The only reason half of them rattled inside was because they'd ripped out panels to fit stupid stereos and not bothered to replace broken clips etc.

Anyway.... you seem like a discerning chap, so this GTI of yours is in for a treat!



2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline chrism3

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Re: Faulty Brake Servo
« Reply #19 on: July 28, 2017, 11:40:13 am »
Yeah dont get me wrong, I love the car, its a keeper.

I had a 2.0tdi A3 before this and had so many issues with it I vowed never to get a VAG again......ops!  :doh:


Offline pudding

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Re: Faulty Brake Servo
« Reply #20 on: July 28, 2017, 12:12:46 pm »
Aaaaah, yes, it's the VAG diesels that are a bit problematic!  DMFs, injectors, turbos.....all of it!!


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Offline chrism3

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Re: Faulty Brake Servo
« Reply #21 on: July 28, 2017, 12:18:26 pm »
I had EGR twice, rad fan wouldn't turn off (same as golf one), DMF went, wiper motor, rear end knock, the list goes on!  :fighting:

Offline J30SBO

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Re: Faulty Brake Servo
« Reply #22 on: June 27, 2021, 02:33:56 pm »
Sorry to revive a very old thread but did you ever change your servo pudding? Mine slightly hisses when not pressed, again very slight and goes away the second you touch the pedal. I also get a slightly hard pedal if I slam my brakes on after being in full boost? Not sure if that’s a weak vacuum pump though

Offline pudding

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Re: Faulty Brake Servo
« Reply #23 on: June 30, 2021, 06:17:55 pm »
Nope, the new servo I bought 5 or 6 years ago is still in the parts box  :grin:  The original servo is still hissing away like a crazed snake down there.

You could try a new seal kit on the vacuum pump.  There's nothing to them really, just a plastic vane spinning round in a housing. Nothing to go wrong.  It's normally just the O rings letting go over time.

Worth also checking the servo hose from vacuum pump all the way round to the servo.  There are a number of check valves and heat shrunk pipe connections that can crack and leak over time.


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Offline J30SBO

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Re: Faulty Brake Servo
« Reply #24 on: July 01, 2021, 07:45:20 am »
Yeah I’ve replaced all the vacuum pipes off of the pump to the inlet and servo as all were split, still have the finest hiss from servo but you have to have everything off with the windows up on idle and listen for it to even hear it! Do you have any negative effects from it hissing a lot?

Offline pudding

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Re: Faulty Brake Servo
« Reply #25 on: July 02, 2021, 11:03:21 pm »
The hissing on mine is really loud, it's proper goosed. 

No negatives other than the brakes not being quite as sharp as they could be, and slightly higher than normal idle fuel trims, because it's an intake air leak basically!

Have a read of Post no.6 on the forum below (same servo as GTI), which is why I've not bothered with it!  It might come out easier with the turbo removed, otherwise it's as the post says.  A big job!

https://www.audi-sport.net/xf/threads/brake-servo-booster-replacement-help-please.189525/


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D