So that time of the year again - MOT, so off I went to my favourite place. Took the dog for a walk, came back and lo and behold - it'd failed

So, what's wrong?

Well... your n/s/r brake disc is too small...

WTF?

Low and behold, its about 15/20mm diameter shy of what it should be!

How on earth did that happen? I've no idea and its been on the car for at least a couple of years as far as I can recall, so its missed 1 MOT for sure, maybe 2

However, it fits where its meant to, so is it a Disco one? Correct one on order, so it'll be back with a new MOT soon.

I think the disc may be from a earlier 2.7 as I believe they had 325mm disc later had 350mm Vin no. dependent, but stand to be corrected.

Cheers
Col

Observant tester !

How weird

I wonder if there's a disco going around the local area with one RRS disc  Kev

MY2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
MY2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey

theres a non Brembo disc and a Brembo disc, difference is 25mm I think

Wow thought the pad contact area would be obviously wrong. Steve

2005 2.7 TDV6 HSE, ongoing project.
1998 Volvo V70 R auto FWD, mothballed future project.
1999 BMW Z3 (owned from new) garage queen.

It is! The pad overlaps disc by the missing amount!

Still brakes fine but obviously wasn't right.

Begs the question what d***head did the job in the first place as must have been quite obvious if the pads overlapped by 10-15mm, especially if only on one side of car. Certainly wouldn't want them anywhere near my car.

Cheers
Col