Porsche 924: MOT pass rate and reliability data

The Porsche 924 fails its first MOT more often than the average UK car, by 2 percentage points. These figures come from the DVSA's full year of anonymised MOT results, covering 553 individual Porsche 924 tests. Nothing here is an estimate or a survey.

The numbers

First-time pass rate74.7%
UK national average76.7%
Difference-2 points
Tests analysed553
Average mileage at test50,484 miles
Average year of manufacture1985
Reliability rank1,631 of 2,005 models

What this means if you are buying one

A 74.7% first-time pass rate means roughly 25 in every 100 Porsche 924s presented for MOT fail on the first attempt. That is worse than average, so budget for remedial work and treat a fresh 12-month MOT as a genuine selling point rather than a given. The average Porsche 924 tested had covered 50,484 miles and was built around 1985.

What this means at salvage auction

Pass rate is a proxy for what a car costs to keep on the road. On a Porsche 924 bought as a repairable salvage, assume the mechanical side needs more than the visible accident damage, and pad your repair estimate accordingly.

Before you bid: run the lot through the analyzer, check the car's own record, check the mileage, decode the VIN, and if it carries a marker use the write-off value calculator. Or compare it against another model.

Looking at a specific Porsche 924 rather than the model in general? The free check covers its MOT and mileage history, and the full HPI report confirms the insurance write-off category, outstanding finance and whether it is recorded stolen, from licensed data for 5 credits. Already own one that has been damaged? Work out whether fixing it beats selling it with the repair or scrap calculator, and see what damaged Porsche 924s actually sold for at UK salvage auction.

Most common MOT failures on a Porsche 924

  1. Emissions levels exceed default limits, 3.5% of tests (12.08x the national rate for this defect)
  2. Audible warning inoperative, 1.8% of tests (8.33x the national rate for this defect)
  3. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 6% of tests (4.86x the national rate for this defect)
  4. An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.5% of tests (4.39x the national rate for this defect)
  5. Emissions test unable to be completed, 1.3% of tests (4.03x the national rate for this defect)
  6. Significant brake effort recorded with no brake applied indicating a binding brake, 2.6% of tests (3.41x the national rate for this defect)
  7. Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, 1.4% of tests (2.55x the national rate for this defect)
  8. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2% of tests (2.28x the national rate for this defect)
  9. The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, 1.7% of tests (2.04x the national rate for this defect)
  10. Exhaust system leaking or insecure, 1.2% of tests (1.58x the national rate for this defect)

From 1,417 DVSA-tracked Porsche 924 tests, 2024. DVSA testers marked 3.11% of these flagged Porsche 924 defects as "dangerous", meaning the tester judged the car unsafe to drive away, against 4.97% nationally.

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All 2,005 models ranked by MOT pass rate