At a Glance
The Audi Tt has 29 identified common problems across 3 generations, with the 8N (1998-2006) being the most affected generation and tyres & wheels the most common problem category. Based on 1.7M 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 Audi Tt 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
Audi Tt 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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Browse Audi Tt Generations
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Most Common Audi Tt MOT Failures
Every reason Audi Tt 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 | Tyre tread depth below limit | 11.40% |
| 2 | Tyre condition | 9.74% |
| 3 | Suspension joint or bush worn | 7.95% |
| 4 | Driveshaft fault | 6.54% |
| 5 | Number plate lamp not working | 5.75% |
| 6 | Wiper blades deteriorated | 5.28% |
| 7 | Position lamp not working | 4.19% |
| 8 | Coil spring broken or corroded | 3.96% |
| 9 | Stop lamp not working | 3.73% |
| 10 | Windscreen washer not working | 3.14% |
| 11 | Brake performance below minimum | 3.07% |
| 12 | Brake pads or linings worn | 2.82% |
| 13 | Catalytic converter efficiency low | 2.60% |
| 14 | Brake disc or drum worn | 2.42% |
| 15 | Ball joint dust cover split | 2.18% |
| 16 | Track rod end worn | 2.09% |
| 17 | Exhaust system fault | 1.97% |
| 18 | Headlamp fault | 1.54% |
| 19 | Rigid brake pipe corroded or damaged | 1.46% |
| 20 | Shock absorber worn or leaking | 1.40% |
| 21 | Spark ignition emissions above threshold | 1.33% |
| 22 | Brake hydraulic component worn | 1.30% |
| 23 | Front lamp not working | 1.17% |
| 24 | Windscreen damage affecting view | 1.17% |
| 25 | Steering rack fault | 0.84% |
| 26 | Indicator fault | 0.73% |
| 27 | Airbag warning light on | 0.66% |
| 28 | Rear lamp not working | 0.64% |
| 29 | Parking brake performance below minimum | 0.62% |
| 30 | MacPherson strut worn | 0.60% |
| 31 | Front suspension joint worn | 0.46% |
| 32 | Rear fog lamp not working | 0.40% |
| 33 | Flexible brake hose damaged | 0.36% |
| 34 | Fog lamp not working | 0.35% |
| 35 | ABS fault | 0.30% |
| 36 | Headlamp aim defect | 0.29% |
| 37 | Electronic stability control fault | 0.29% |
| 38 | Battery loose or leaking | 0.27% |
| 39 | Seat belt condition | 0.27% |
| 40 | Compression ignition emissions above threshold | 0.24% |
| 41 | Horn not working | 0.22% |
| 42 | Wheel bearing worn | 0.21% |
| 43 | Tyre size or type not matched | 0.17% |
| 44 | Brake caliper fault | 0.17% |
| 45 | Power steering pipe or hose leaking | 0.17% |
| 46 | Subframe corrosion or damage | 0.15% |
| 47 | Brake pedal movement restricted | 0.15% |
| 48 | Front suspension fault | 0.14% |
| 49 | Tyre pressure monitoring system fault | 0.14% |
| 50 | Suspension arm worn or corroded | 0.14% |
| 51 | Tyre valve stem damaged | 0.13% |
| 52 | Mirror damaged or missing | 0.12% |
| 53 | Front passenger door fault | 0.12% |
| 54 | Suspension mounting corroded | 0.12% |
| 55 | Brake pedal fault | 0.11% |
| 56 | Headlamp washer not working | 0.10% |
| 57 | Parking brake condition | 0.10% |
| 58 | Headlamp levelling device fault | 0.10% |
| 59 | Bonnet catch or hinge fault | 0.10% |
| 60 | Brake fluid leak | 0.09% |
| 61 | Suspension linkage fault | 0.09% |
| 62 | Rear suspension fault | 0.08% |
| 63 | Engine oil leak | 0.08% |
| 64 | Electrical wiring fault | 0.07% |
| 65 | Brake lever fault | 0.07% |
| 66 | Bonded suspension condition | 0.07% |
| 67 | Brake cable, rod, lever or linkage fault | 0.06% |
| 68 | Fuel cap damaged or missing | 0.06% |
| 69 | Driver door fault | 0.06% |
| 70 | Brake fluid level low or contaminated | 0.06% |
| 71 | Dashboard warning lamp fault | 0.05% |
| 72 | Undertray damaged or missing | 0.04% |
| 73 | Vehicle structure corrosion | 0.04% |
| 74 | Propshaft fault | 0.04% |
| 75 | Body corrosion or damage | 0.04% |
| 76 | Steering arm worn | 0.04% |
| 77 | Electrical switch fault | 0.04% |
| 78 | Handbrake lever fault | 0.04% |
| 79 | Electric power steering fault | 0.04% |
| 80 | Rear reflector damaged or missing | 0.04% |
| 81 | Reversing lamp not working | 0.03% |
| 82 | Chassis condition | 0.03% |
| 83 | Steering operation fault | 0.03% |
| 84 | Anti-roll bar worn or corroded | 0.03% |
| 85 | Steering free play excessive | 0.03% |
| 86 | Driver seat fault | 0.03% |
| 87 | Driver airbag fault | 0.02% |
| 88 | Bumper damaged or insecure | 0.02% |
| 89 | Drag link end worn | 0.02% |
| 90 | CV joint worn | 0.02% |
| 91 | Brake fluid warning light on | 0.02% |
| 92 | Passenger seat fault | 0.02% |
| 93 | Electronic braking system fault | 0.02% |
| 94 | Handbrake cable fault | 0.02% |
| 95 | Fuel pipe corroded or damaged | 0.01% |
| 96 | Power steering pump fault | 0.01% |
| 97 | Steering wheel damaged or insecure | 0.01% |
| 98 | Power steering ram fault | 0.01% |
| 99 | King pin or swivel pin worn | 0.01% |
| 100 | Body security fault | 0.01% |
| 101 | Hydraulic fluid leak | 0.01% |
| 102 | Exhaust leak | 0.01% |
| 103 | Speedometer fault | 0.01% |
| 104 | Steering lock fault | 0.01% |
| 105 | Brake servo fault | <0.01% |
| 106 | Passenger airbag fault | <0.01% |
| 107 | Boot lid damaged or insecure | <0.01% |
| 108 | Fuel tank corroded or leaking | <0.01% |
| 109 | Rear fog lamp warning light fault | <0.01% |
| 110 | Suspension unit fault | <0.01% |
| 111 | Suspension retaining or locking device fault | <0.01% |
| 112 | Hydraulic brake cylinder fault | <0.01% |
| 113 | Tie bar or rod worn or corroded | <0.01% |
| 114 | Engine mounting worn or broken | <0.01% |
| 115 | Window damaged or won't operate | <0.01% |
| 116 | Subframe mounting corroded | <0.01% |
| 117 | Steering column fault | <0.01% |
| 118 | Transmission oil leak | <0.01% |
| 119 | Brake back plate corroded or damaged | <0.01% |
| 120 | Additional braking device fault | <0.01% |
| 121 | Fuel hose damaged or leaking | <0.01% |
| 122 | Indicator warning light fault | <0.01% |
| 123 | Air suspension levelling valve fault | <0.01% |
| 124 | Full power hydraulic brake fault | <0.01% |
| 125 | Brake fluid reservoir fault | <0.01% |
| 126 | Exhaust heat shield or sound insulation damaged | <0.01% |
| 127 | Exhaust emissions above threshold (non-catalyst) | <0.01% |
| 128 | Mirror or camera fault | <0.01% |
| 129 | Suspension rod worn or corroded | <0.01% |
| 130 | Brake air or vacuum system fault | <0.01% |
| 131 | Brake master cylinder fault | <0.01% |
| 132 | Dip switch fault | <0.01% |
| 133 | Outline marker lamp not working | <0.01% |
| 134 | Load sensing valve fault | <0.01% |
| 135 | Brake valve fault | <0.01% |
| 136 | Suspension linkage attachment bracket or mounting corroded | <0.01% |
| 137 | Main beam warning light fault | <0.01% |
| 138 | Trailing arm worn or corroded | <0.01% |
| 139 | Brake pressure or vacuum buildup insufficient | <0.01% |
| 140 | Electronic parking brake fault | <0.01% |
| 141 | Front fog lamp not working | <0.01% |
| 142 | Hand-operated brake valve condition | <0.01% |
| 143 | Steering box fault | <0.01% |
| 144 | Universal joint worn | <0.01% |
| 145 | Steering coupling worn | <0.01% |
| 146 | Access panel damaged or insecure | <0.01% |
| 147 | Handbrake fails on gradient | <0.01% |
| 148 | Leaf spring broken or corroded | <0.01% |
| 149 | Steering shaft fault | <0.01% |
| 150 | Torque or reaction arm worn | <0.01% |
| 151 | Tailgate damaged or insecure | <0.01% |
| 152 | Hazard warning light fault | <0.01% |
| 153 | Seat belt pre-tensioner fault | <0.01% |
| 154 | Torsion bar worn or corroded | <0.01% |
| 155 | Wheel hub fault | <0.01% |
| 156 | Axle corroded or damaged | <0.01% |
| 157 | Radius arm worn or corroded | <0.01% |
| 158 | Seat belt anchorage fault | <0.01% |
| 159 | Semaphore indicator fault | <0.01% |
| 160 | Spring mounting corroded | <0.01% |
| 161 | Steering drive system fault | <0.01% |
| 162 | Brake relay lever fault | <0.01% |
| 163 | Reversing lamp switch fault | <0.01% |
| 164 | Body strengthening plate corroded | <0.01% |
| 165 | Daytime running lamp not working | <0.01% |
| 166 | Panhard rod worn or corroded | <0.01% |
| 167 | Spare wheel fault | <0.01% |
| 168 | Vehicle floor corroded | <0.01% |
| 169 | Passenger compartment corrosion | <0.01% |
| 170 | Air brake cylinder or actuator fault | <0.01% |
| 171 | Brake slack adjuster fault | <0.01% |
| 172 | Brake stationary pin worn | <0.01% |
| 173 | Halfshaft fault | <0.01% |
| 174 | Seat belt or padding damaged | <0.01% |
| 175 | Steering damper fault | <0.01% |
| 176 | Steering intermediate drop arm worn | <0.01% |
| 177 | Steering lock stop fault | <0.01% |
| 178 | Stub axle worn | <0.01% |
| 179 | Transmission drive belt fault | <0.01% |
| 180 | Speed limiter fault | <0.01% |
| 181 | Towbar fault | <0.01% |
| 182 | Brake linkage mounting fault | <0.01% |
| 183 | Brake pedal linkage fault | <0.01% |
| 184 | Hinged tailboard damaged or insecure | <0.01% |
| 185 | Steering head bearings worn | <0.01% |
Showing all 185 reasons — scroll inside the table for the full list.
Audi Tt MOT Failures by Category
Total MOT failure occurrences for the Audi Tt, 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 Audi Tt problems?
Based on analysis of 1.7M Audi Tt MOT tests from DVSA data, we have 29 identified common problems across 3 generations. The most frequently flagged issue is "Front lamp not working". Tyres & Wheels is the most common problem category.
Which Audi Tt generation has the most problems?
The Audi Tt 8N (1998-2006) (1998–2006) has the highest number of identified common problems (33). 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 Audi Tt?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Audi Tt owners spot problems early. All submissions are reviewed before being added to the public database.
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