Costly Brake Replacement

[Lovemyev]

Stoob, I'm a retired technician & from the pictures those discs look fine. The grooving on one or two of them looks ok. Not bad enough to need replacing. The one caveat is that the grooves may not be showing up properly on the photo but I suspect they are fine. If you need new pads they will settle down ok. Have a chat with your dealer about this or go to another dealer for a second opinion.

I totally agree, if you are going to replace them discs at that stage, then it is likely that every 2 year old EV would need them replacing .
Good business for the dealer charging almost a grand on top of servicing an EV.
Looking for work IMHO.
I try to remember to drop my regen to the lowest setting one day a week to try and reduce rust build up forming.
Winter / road smuts etc is the main cause, and lack of use.

 

[MG Clive]

By the way @Stoob, don't worry about the rusty bits you're seeing on the discs, that doesn't affect the use or efficiency of the brakes, so they won't need replacing because of that.

 

[Stoob]

Stoob, I'm a retired technician & from the pictures those discs look fine. The grooving on one or two of them looks ok. Not bad enough to need replacing. The one caveat is that the grooves may not be showing up properly on the photo but I suspect they are fine. If you need new pads they will settle down ok. Have a chat with your dealer about this or go to another dealer for a second opinion.

Thank you. The groves can be felt with the fingertip on one disc but they’re not deep. I might look for another dealer. Or take them to another mechanic altogether.

Discs look fine.
Would be interesting to know the thickness but I'd be 99.9% sure they are OK.

Disc thickness on the front between 9.35 and 9.4 mm. At the back, 10mm+.

 

[Stoob]

By the way @Stoob, don't worry about the rusty bits you're seeing on the discs, that doesn't affect the use or efficiency of the brakes, so they won't need replacing because of that.

I was actually wondering whether that was what was bothering the mechanics. Didn’t see how they’d interfere but…what do I know?

 

[Alb]

Disc thickness on the front between 9.35 and 9.4 mm. At the back, 10mm+.

Doesn't sound right for the fronts, minimum is 23mm IIRC.
Rears would have been 10mm when new so are pretty much unworn.

 

[Stoob]

Well, there seem to be two discs on the front. Can't really see; separated but together? both - i.e. the pair of discs and the gap between them - measure 26.36 mm. Previously, I measured only the outside, visible disc on the front wheels. Is that right? The two discs on the front are bound together, apparently one unit with a gap between them, but I can't really get in there to see properly. If necessary, I could turn the wheel, I suppose.

 

[MG Clive]

Yes that is correct @Stoob, the measurement should be for both discs together, this type of discs are known as 'vented discs', and it's as you've described, it's basically 2 single discs fixed together with an air gap in between to aid brake cooling.

 

[OriginalBigAl]

It appears that all the evidence points to them " trying it on " if they were serious they would have put it in writing? which would put themselves in a better position legally.

 

[Stoob]

It appears that all the evidence points to them " trying it on " if they were serious they would have put it in writing? which would put themselves in a better position legally.

In fact they included this in their report. (I’ve shown only the references to the brakes). It’s a bit puzzling because it’s the second they sent. The first does not have the strike throughs. What’s shocking is that you can buy a pair for under £100.

 

[Lovemyev]

Until third party parts became available and a much lower price point, the dealer had total monopoly on what they wanted to charge for the MG replacement discs and pads.
The third party items are WAY less expensive than the dealer supplied parts of course.
The problem here is of course, that to retain the warranty, genuine MG parts have to be installed and they know this !.
unless you can circumnavigate around this issue ( if you get my drift ).

 

[Gadget Geek]

I'm wondering, if brakes aren't covered in the warranty, will using 3rd party pads and discs affect the warranty of the parts which are covered?