BMW 503 MOT reliability

BMW 503s passed their MOT first time 100% of the time across 1 test in 2025.

Example photo of a BMW 503 — Photo: Alexander Migl · CC BY-SA 4.0 · Wikimedia Commons

These figures come from only 1 MOT test. With so few cars, a single pass or fail changes the percentages a lot, so treat them as a rough guide rather than a true average.

First-time pass rate

100%

MOTs analysed

1

Still licensed (GB)

–

Body type

–

Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

2003 petrol

1 MOT

Passed first time 100%. Typical mileage 147,200 (most between 147,200 and 147,200).

2021: 100% → 2022: 100% → 2023: 100% → 2024: 100% → 2025: 100%

Looking at a particular car?

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Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.