MOT failure rate and common problems for the Bentley 4.5, and how to check your own car by registration.

Updated 05 September 2026.

5.0%fail rate

Bentley 4.5 MOT failure rate

What a Bentley 4.5 fails its MOT on, and the part that fixes each.

What it fails on, and why

Lamps & electrical26.3% of failures

Lighting is the single most common MOT failure and the cheapest to put right. A blown headlight, brake-light or number-plate bulb, a cracked lens, or a headlamp beam that points too high or low will all fail. Most are a two-minute bulb swap.

Suspension10.5% of failures

Suspension failures usually mean a worn or snapped coil spring, a leaking shock absorber, or play in a lower arm ball joint or bush. The tester checks for corrosion, fractures and excessive movement. A broken front spring is one of the most common failures on higher-mileage cars and is a straightforward replacement.

Visibility/wipers10.5% of failures

Visibility failures include torn or smearing wiper blades, a washer jet that does not reach the screen, and chips or cracks in the driver's swept area. Blades and washer fluid are quick, cheap fixes.

Steering5.3% of failures

Steering faults are typically worn track-rod ends or ball joints, play in the rack, or a split gaiter letting grease out and dirt in. Excessive free play at the wheel fails.

Brakes5.3% 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.

Registration plate5.3% of failures

A missing, damaged, dirty or incorrectly-spaced number plate, or one using the wrong font, will fail. A replacement plate is inexpensive.

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.

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For the suspension failure: Bentley 4.5 suspension springs and shock absorbersShop Bentley 4.5 suspension springs and shock absorbers on Amazonaffiliate Find Bentley 4.5 suspension springs and shock absorbers on eBayaffiliate

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For the steering failure: Bentley 4.5 steering track rod endsShop Bentley 4.5 steering track rod ends on Amazonaffiliate Find Bentley 4.5 steering track rod ends on eBayaffiliate

For the brakes failure: Bentley 4.5 brake pads and discsShop Bentley 4.5 brake pads and discs on Amazonaffiliate Find Bentley 4.5 brake pads and discs on eBayaffiliate

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Other models

All Bentley models MOT failure rates comparedRanked worst to best Bentley Continental MOT failures9.5% failure rate Bentley Arnage MOT failures14.0% failure rate Ford Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Bentley 4.5?

It fails 5.0% of its MOT tests across the DVSA record, from 382 tests.

What do these cars fail their MOT on most?

The most common failure area is lamps & electrical, at 26.3% of this model's failures.