Know Your MOT

MOT failure rate and common problems for the Mercedes-Benz S63, and how to check your own car by registration.

Updated 05 September 2026.

7.4%fail rate

Mercedes-Benz S63 MOT failure rate

What a Mercedes-Benz S63 fails its MOT on, and the part that fixes each.

What it fails on, and why

Brakes50.0% of failures

Brake failures cover worn pads and discs, an imbalance between wheels, corroded or scored discs, or a binding caliper. Braking efficiency is measured on a rolling road, so a spongy or pulling brake shows up as a low reading.

Tyres25.0% of failures

Tyres fail for tread below the 1.6mm legal limit across the central three-quarters, uneven or exposed-cord wear, or sidewall damage. The tester inspects all four; a single illegal tyre is a fail.

The parts that fix each

If your car has just failed, you have 10 working days to fix the items and get a free partial retest. Confirm the exact fitment against your registration or VIN before buying.

For the brakes failure: Mercedes-Benz S63 brake pads and discsShop Mercedes-Benz S63 brake pads and discs on AmazonaffiliateFind Mercedes-Benz S63 brake pads and discs on eBayaffiliate
For the tyres failure: Mercedes-Benz S63 tyresShop Mercedes-Benz S63 tyres on AmazonaffiliateFind Mercedes-Benz S63 tyres on eBayaffiliate

Other models

All Mercedes-Benz models MOT failure rates comparedRanked worst to bestMercedes-Benz C-Class MOT failures22.4% failure rateMercedes-Benz E-Class MOT failures20.5% failure rateFord Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Mercedes-Benz S63?

It fails 7.4% of its MOT tests across the DVSA record, from 54 tests.

What do these cars fail their MOT on most?

The most common failure area is brakes, at 50.0% of this model's failures.