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

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. The Porsche 924 sits 2 points below the national average, ranked 1,631 of 2,005 models. On one bought as 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 recorded closing bids for damaged Porsche 924s at UK salvage auction.

Most common MOT failures on a Porsche 924

1. Emissions levels exceed default limits, 4.5% of tests (12.8x the national rate for this defect)
2. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 7.8% of tests (4.62x the national rate for this defect)
3. Significant brake effort recorded with no brake applied indicating a binding brake, 3.4% of tests (3.32x the national rate for this defect)
4. The aim of a headlamp is not within limits laid down in the requirements, 2.9% of tests (1.23x the national rate for this defect)
5. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2.5% of tests (2.07x the national rate for this defect)
6. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 2.2% of tests
7. Audible warning inoperative, 2.2% of tests (7.72x the national rate for this defect)
8. 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, 2% of tests (2.11x the national rate for this defect)
9. 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, 1.8% of tests (4.12x the national rate for this defect)
10. Wiper blade missing or obviously not clearing the windscreen, 1.8% of tests

From 552 DVSA-tracked Porsche 924 tests, 2024. DVSA testers marked 2.79% of these flagged Porsche 924 defects as "dangerous", meaning the tester judged the car unsafe to drive away, against 5.11% nationally.

Most common MOT advisories on a Porsche 924

An advisory doesn't fail the car - the tester flags it as worth watching, but it still passes. A different list from the failures above: what testers are noting on a Porsche 924 before it actually fails on it.

1. A wheel bearing with excessive play, 10.3% of tests (15.91x the national rate for this advisory)
2. A flexible brake hose excessively damaged, deteriorated, chafed, twisted or stretched, 3.3% of tests (5.82x the national rate for this advisory)
3. Significant brake effort recorded with no brake applied indicating a binding brake, 7.8% of tests (3.9x the national rate for this advisory), also fails
4. A brake hose ferrule excessively corroded, 4.2% of tests (3.27x the national rate for this advisory)
5. Brake pipe damaged or excessively corroded, 17.6% of tests (2.84x the national rate for this advisory)
6. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 13.9% of tests (2.51x the national rate for this advisory)
7. Exhaust system leaking or insecure, 5.4% of tests (1.91x the national rate for this advisory)
8. A suspension component excessively damaged or corroded, 7.6% of tests (1.47x the national rate for this advisory)
9. A tyre seriously damaged, 8.2% of tests
10. Brake disc or drum excessively weakened, insecure or fractured, 4.5% of tests

From 552 DVSA-tracked Porsche 924 tests, 2024.

Other Porsche models

• Porsche 911 - 89%
• Porsche Boxster - 84.2%
• Porsche Macan - 92.1%
• Porsche Cayenne - 86.4%
• Porsche Cayman - 89.9%
• Porsche Panamera - 87.8%
• Porsche Taycan 4s 93kwh - 90.8%
• Porsche 944 - 77.4%

Models with a similar pass rate

• Volkswagen Passat - 74.7%
• Peugeot 3008 - 74.7%
• Mercedes-Benz B-Class - 74.7%
• Vauxhall Adam - 74.6%
• DS Ds3 - 74.6%
• Nissan Patrol - 74.6%

If this car is a salvage or write-off

• What does Cat N mean? Category N explained
• What does Cat S mean? Category S explained
• Cat S vs Cat N: the real differences
• Do you need an HPI check on a car you know is a write-off?

Embed this data

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<a href="https://www.salvageprophet.co.uk/mot/porsche-924"><img src="https://www.salvageprophet.co.uk/badge/porsche-924.svg" width="340" height="92" alt="Porsche 924 MOT Pass Rate: 74.7% - Salvage Prophet"></a>

Run a garage or parts site? Embed the Porsche 924's top real failure reason instead, linked back here.

<a href="https://www.salvageprophet.co.uk/mot/porsche-924"><img src="https://www.salvageprophet.co.uk/badge/failure/porsche-924.svg" width="340" height="106" alt="Porsche 924 most common MOT failure: Emissions levels exceed default limits (4.5% of tests) - Salvage Prophet"></a>

All 2,005 models ranked by MOT pass rate