Issue with wife's car

JonB · Afraid of Mileage Joined: 03 Jun 2004 Karma :

Hi

Car in question:

Mini One 2005
Mileage 70,000

Issue: Car judders under light braking, can actually feel it sat in the passengers seat. On the last MOT there was an advisary that all discs were worn. So could quite easily be this, but don't trust a garage to not say it isn't and spend £100s replacing the discs only for the judder still to be there.
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Bikeless · World Chat Champion Joined: 27 Jun 2008 Karma :

Discs aren't that expensive mate,I pay around £15 per disc at My local motor factors.

JonB · Afraid of Mileage Joined: 03 Jun 2004 Karma :

bikertomm · World Chat Champion Joined: 03 Jul 2010 Karma :

Quick question, is it an automatic?

Also if manual put it into neutral and brake down from speed and if it judders then you pretty much know it's the brakes.

Thumbs Up

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chrisw · World Chat Champion Joined: 24 Apr 2006 Karma :

It's rarely warped discs that cause vibration under braking. It can, but in most cases it's worn suspension components (bushes etc..).
If you have access to a dial-gauge it's easy enough to check the run-out on the discs and rule them in/out.

sidewinder · World Chat Champion Joined: 24 Aug 2011 Karma :

Wheel bearings can cause this aswell in some cars Thumbs Up

Or the other option is to take it somewhere like kwik fit for a free brake check Very Happy

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SWID · Banned Joined: 06 Oct 2012 Karma :

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

Discs are cheap and they are only a tad harder than removing the wheels. The hard part is getting the brake calipers off, but if you can do that then you can swap brake discs.
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JonB · Afraid of Mileage Joined: 03 Jun 2004 Karma :

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

About £100 a set with pads +1.5 hours per corner max. Back St garage will charge you £250 max to supply and fit.
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shereen · World Chat Champion Joined: 15 Mar 2011 Karma :

My first guess would be distorted discs.

Second guess if its not the discs would be a faulty ABS sensor.
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Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

ABS kicking in is far more than a judder!
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Bikeless · World Chat Champion Joined: 27 Jun 2008 Karma :

lihp · World Chat Champion Joined: 22 Sep 2010 Karma :

Be careful when removing the brake discs/pads/calipers on the BMW Minis, they have a brake pad level electronic sensor which is fragile and very easy to damage when removing any of the brake components.

This can make brake changes pricy too.

unitynotsocri... · Banned Joined: 29 Jun 2011 Karma :

might just be sticking pistons or near knacked disc/pads.
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Polarbear · Super Spammer Joined: 24 Feb 2007 Karma :

I use kwik fit for things like that now. Before you all scream 'mug', the reason I do that is at our local branch, once they have discovered the fault, they invite you to come and look at it on the car before they do any work, so if it's worn disks, you can come to your own conclusion about them.

I don't know if this is general kwik fit policy or just our branch though.
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Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

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JonB · Afraid of Mileage Joined: 03 Jun 2004 Karma :

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Be careful whose advice you buy, but, be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than it?s worth.

SWID · Banned Joined: 06 Oct 2012 Karma :

Polarbear · Super Spammer Joined: 24 Feb 2007 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

When braking VERY lightly a low speed can you feel any pulsing through the pedal?

Warped disk would be my main guess (especially if they have already been written up as being worn.

Could also be a build up of rubbish on the disks (or inside a drum if they are used). I would tend to go with this if the problem appeared after the car had been left parked up for a while after which the problem became apparent (if which case check the braking surface on which the handbrake operates).

All the best

Keith
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lihp · World Chat Champion Joined: 22 Sep 2010 Karma :

unless they have a ridge as a lot of pads don't cover edges of disc so you would be better with micrometer Wink