Know Your MOT

MOT failure rate and common problems for the Harley Davidson Flstsi, and how to check your own car by registration.

Updated 05 September 2026.

10.8%fail rate

Harley Davidson Flstsi MOT failure rate

What a Harley Davidson Flstsi fails its MOT on, and the part that fixes each.

What it fails on, and why

Lamps & electrical42.9% 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.

Brakes14.3% 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.

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 lamps & electrical failure: Harley Davidson Flstsi headlight and indicator bulbsShop Harley Davidson Flstsi headlight and indicator bulbs on AmazonaffiliateFind Harley Davidson Flstsi headlight and indicator bulbs on eBayaffiliate
For the brakes failure: Harley Davidson Flstsi brake pads and discsShop Harley Davidson Flstsi brake pads and discs on AmazonaffiliateFind Harley Davidson Flstsi brake pads and discs on eBayaffiliate

Other models

All Harley Davidson models MOT failure rates comparedRanked worst to bestHarley Davidson Xl MOT failures10.7% failure rateHarley Davidson Flstf MOT failures9.8% failure rateFord Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Harley Davidson Flstsi?

It fails 10.8% of its MOT tests across the DVSA record, from 65 tests.

What do these cars fail their MOT on most?

The most common failure area is lamps & electrical, at 42.9% of this model's failures.