At a Glance
The Porsche 924 has 33 identified common problems across 1 generation, with the 924 (1976-1988) being the most affected generation and brakes the most common problem category. Based on 26K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read our DVSA MOT data methodology →
Below: generation-by-generation comparison of Porsche 924 common problems, MOT failure types, and pass-rate data drawn from DVSA records. Click any generation to see fuel- and engine-specific fault patterns, mileage-banded repair guidance, and the most common MOT failures testers record.
MOT Tests & Failures by Generation
Porsche 924 generations by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that generation's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Most Common Porsche 924 MOT Failures
Every reason Porsche 924 vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Brake hydraulic component worn | 9.12% |
| 2 | Number plate lamp not working | 8.28% |
| 3 | Stop lamp not working | 4.97% |
| 4 | Front lamp not working | 4.82% |
| 5 | Tyre tread depth below limit | 4.52% |
| 6 | Brake performance below minimum | 4.14% |
| 7 | Wiper blades deteriorated | 3.70% |
| 8 | Body corrosion or damage | 3.21% |
| 9 | Brake disc or drum worn | 3.15% |
| 10 | Suspension joint or bush worn | 3.11% |
| 11 | Suspension mounting corroded | 3.07% |
| 12 | Track rod end worn | 2.68% |
| 13 | Headlamp aim defect | 2.63% |
| 14 | Shock absorber worn or leaking | 2.37% |
| 15 | Chassis condition | 2.13% |
| 16 | Exhaust system fault | 2.10% |
| 17 | Tyre condition | 2.06% |
| 18 | Position lamp not working | 1.72% |
| 19 | Headlamp fault | 1.65% |
| 20 | Parking brake performance below minimum | 1.65% |
| 21 | Brake pads or linings worn | 1.52% |
| 22 | Subframe mounting corroded | 1.50% |
| 23 | Fog lamp not working | 1.41% |
| 24 | Rigid brake pipe corroded or damaged | 1.33% |
| 25 | Rear lamp not working | 1.09% |
| 26 | Flexible brake hose damaged | 1.02% |
| 27 | Steering rack fault | 1.00% |
| 28 | MacPherson strut worn | 0.99% |
| 29 | Windscreen damage affecting view | 0.88% |
| 30 | Wheel bearing worn | 0.85% |
| 31 | Coil spring broken or corroded | 0.81% |
| 32 | Brake pedal fault | 0.72% |
| 33 | Parking brake condition | 0.57% |
| 34 | Vehicle structure corrosion | 0.57% |
| 35 | Steering free play excessive | 0.57% |
| 36 | Rear fog lamp not working | 0.55% |
| 37 | Electrical switch fault | 0.53% |
| 38 | Front suspension joint worn | 0.51% |
| 39 | Steering wheel damaged or insecure | 0.51% |
| 40 | Mirror damaged or missing | 0.40% |
| 41 | Steering column fault | 0.40% |
| 42 | Driveshaft fault | 0.40% |
| 43 | Brake caliper fault | 0.39% |
| 44 | Exhaust emissions above threshold (non-catalyst) | 0.38% |
| 45 | Steering operation fault | 0.38% |
| 46 | Fuel pipe corroded or damaged | 0.37% |
| 47 | Suspension arm worn or corroded | 0.37% |
| 48 | Tyre size or type not matched | 0.35% |
| 49 | Windscreen washer not working | 0.35% |
| 50 | Fuel cap damaged or missing | 0.34% |
| 51 | Power steering pipe or hose leaking | 0.34% |
| 52 | Electrical wiring fault | 0.32% |
| 53 | Steering arm worn | 0.32% |
| 54 | Battery loose or leaking | 0.29% |
| 55 | Steering lock fault | 0.28% |
| 56 | Handbrake cable fault | 0.26% |
| 57 | Suspension linkage fault | 0.22% |
| 58 | Power steering pump fault | 0.20% |
| 59 | Brake lever fault | 0.20% |
| 60 | Rear suspension fault | 0.20% |
| 61 | Steering shaft fault | 0.19% |
| 62 | Spring mounting corroded | 0.18% |
| 63 | Brake back plate corroded or damaged | 0.17% |
| 64 | Dashboard warning lamp fault | 0.17% |
| 65 | Speedometer fault | 0.17% |
| 66 | Driver door fault | 0.16% |
| 67 | Body security fault | 0.16% |
| 68 | Fuel hose damaged or leaking | 0.16% |
| 69 | Horn not working | 0.15% |
| 70 | Indicator fault | 0.15% |
| 71 | Bonnet catch or hinge fault | 0.13% |
| 72 | Brake fluid leak | 0.13% |
| 73 | Universal joint worn | 0.13% |
| 74 | Engine oil leak | 0.13% |
| 75 | Brake wheel cylinder fault | 0.12% |
| 76 | Seat belt condition | 0.12% |
| 77 | Brake fluid level low or contaminated | 0.11% |
| 78 | Driver seat fault | 0.11% |
| 79 | Boot lid damaged or insecure | 0.11% |
| 80 | Drag link end worn | 0.11% |
| 81 | Anti-roll bar worn or corroded | 0.10% |
| 82 | Brake air or vacuum system fault | 0.10% |
| 83 | Handbrake mechanism or mounting fault | 0.10% |
| 84 | Passenger seat fault | 0.10% |
| 85 | Brake fluid warning light on | 0.09% |
| 86 | Fuel tank corroded or leaking | 0.09% |
| 87 | Tyre valve stem damaged | 0.09% |
| 88 | Brake master cylinder or servo mounting fault | 0.08% |
| 89 | Front passenger door fault | 0.08% |
| 90 | Handbrake lever fault | 0.08% |
| 91 | Spark ignition emissions above threshold | 0.08% |
| 92 | Ball joint dust cover split | 0.08% |
| 93 | Catalytic converter efficiency low | 0.07% |
| 94 | Vehicle floor corroded | 0.07% |
| 95 | Brake pedal movement restricted | 0.06% |
| 96 | Dip switch fault | 0.06% |
| 97 | Tailgate damaged or insecure | 0.06% |
| 98 | Engine mounting worn or broken | 0.05% |
| 99 | Exhaust leak | 0.05% |
| 100 | Front suspension fault | 0.05% |
| 101 | Rear reflector damaged or missing | 0.05% |
| 102 | Suspension retaining or locking device fault | 0.05% |
| 103 | Suspension unit fault | 0.05% |
| 104 | Brake cable, rod, lever or linkage fault | 0.04% |
| 105 | Brake master cylinder fault | 0.04% |
| 106 | Power steering ram fault | 0.04% |
| 107 | Indicator warning light fault | 0.04% |
| 108 | Rear fog lamp warning light fault | 0.04% |
| 109 | Brake fluid reservoir fault | 0.03% |
| 110 | Headlamp levelling device fault | 0.03% |
| 111 | Hydraulic brake cylinder fault | 0.03% |
| 112 | Hydraulic fluid leak | 0.03% |
| 113 | Semaphore indicator fault | 0.03% |
| 114 | Steering drive system fault | 0.03% |
| 115 | Steering coupling worn | 0.03% |
| 116 | Brake linkage mounting fault | 0.02% |
| 117 | Body strengthening plate corroded | 0.01% |
| 118 | Bumper damaged or insecure | 0.01% |
| 119 | Compression ignition emissions above threshold | 0.01% |
| 120 | Main beam warning light fault | 0.01% |
| 121 | Mirror or camera fault | 0.01% |
| 122 | Seat belt pre-tensioner fault | 0.01% |
| 123 | Spare wheel fault | 0.01% |
| 124 | Steering intermediate drop arm worn | 0.01% |
| 125 | Steering lock stop fault | 0.01% |
| 126 | Suspension linkage attachment bracket or mounting corroded | 0.01% |
| 127 | Tie bar or rod worn or corroded | 0.01% |
| 128 | Trailing arm worn or corroded | 0.01% |
| 129 | Bonded suspension condition | 0.01% |
| 130 | Axle beam corroded or cracked | <0.01% |
| 131 | Axle corroded or damaged | <0.01% |
| 132 | Brake pressure or vacuum buildup insufficient | <0.01% |
| 133 | Brake servo fault | <0.01% |
| 134 | Brake stationary pin worn | <0.01% |
| 135 | Brake valve fault | <0.01% |
| 136 | Dropside damaged or insecure | <0.01% |
| 137 | Hand-operated brake valve condition | <0.01% |
| 138 | Headlamp washer not working | <0.01% |
| 139 | Propshaft fault | <0.01% |
| 140 | Radius arm worn or corroded | <0.01% |
| 141 | Seat belt anchorage fault | <0.01% |
| 142 | Subframe corrosion or damage | <0.01% |
| 143 | Suspension coupling worn | <0.01% |
| 144 | Transmission oil leak | <0.01% |
Showing all 144 reasons — scroll inside the table for the full list.
Porsche 924 MOT Failures by Category
Total MOT failure occurrences for the Porsche 924, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Porsche 924 problems?
Based on analysis of 26K Porsche 924 MOT tests from DVSA data, we have 33 identified common problems across 1 generation. The most frequently flagged issue is "Windscreen washer not working". Brakes is the most common problem category.
Which Porsche 924 generation has the most problems?
The Porsche 924 924 (1976-1988) (1976–1988) has the highest number of identified common problems (42). Click the generation card above for the full breakdown.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
Can I report a problem with my Porsche 924?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Porsche 924 owners spot problems early. All submissions are reviewed before being added to the public database.
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