At a Glance
The Mazda Bt-50 has 25 identified common problems across 2 generations, with the 1st gen UN (2006-2011) being the most affected generation and brakes the most common problem category. Based on 21K 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 Mazda Bt-50 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
Mazda Bt-50 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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Tell Us About Your Problem
Help other Mazda Bt-50 owners — report a problem and we'll add it to the database
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Browse Mazda Bt-50 Generations
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Most Common Mazda Bt-50 MOT Failures
Every reason Mazda Bt-50 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 | 9.43% |
| 2 | Rigid brake pipe corroded or damaged | 7.73% |
| 3 | Stop lamp not working | 6.79% |
| 4 | Tyre tread depth below limit | 5.77% |
| 5 | Front lamp not working | 5.43% |
| 6 | Windscreen washer not working | 5.32% |
| 7 | Brake performance below minimum | 4.22% |
| 8 | Shock absorber worn or leaking | 3.58% |
| 9 | Suspension joint or bush worn | 3.18% |
| 10 | Brake pads or linings worn | 3.11% |
| 11 | Headlamp aim defect | 2.80% |
| 12 | Wiper blades deteriorated | 2.70% |
| 13 | Number plate lamp not working | 2.56% |
| 14 | Tyre condition | 2.41% |
| 15 | Exhaust system fault | 2.23% |
| 16 | Position lamp not working | 1.90% |
| 17 | Indicator fault | 1.67% |
| 18 | Rear lamp not working | 1.62% |
| 19 | Driveshaft fault | 1.47% |
| 20 | Wheel bearing worn | 1.34% |
| 21 | Track rod end worn | 1.05% |
| 22 | Rear reflector damaged or missing | 1.03% |
| 23 | Headlamp fault | 1.03% |
| 24 | Windscreen damage affecting view | 0.93% |
| 25 | ABS fault | 0.92% |
| 26 | Suspension linkage fault | 0.92% |
| 27 | Compression ignition emissions above threshold | 0.87% |
| 28 | Parking brake performance below minimum | 0.87% |
| 29 | Seat belt condition | 0.86% |
| 30 | Fog lamp not working | 0.83% |
| 31 | Rear fog lamp not working | 0.83% |
| 32 | Chassis condition | 0.79% |
| 33 | Battery loose or leaking | 0.74% |
| 34 | Airbag warning light on | 0.69% |
| 35 | Mirror damaged or missing | 0.68% |
| 36 | Horn not working | 0.65% |
| 37 | Spark ignition emissions above threshold | 0.58% |
| 38 | Flexible brake hose damaged | 0.50% |
| 39 | Body corrosion or damage | 0.47% |
| 40 | Leaf spring broken or corroded | 0.43% |
| 41 | Steering box fault | 0.42% |
| 42 | Ball joint dust cover split | 0.42% |
| 43 | Brake disc or drum worn | 0.40% |
| 44 | Vehicle structure corrosion | 0.38% |
| 45 | Suspension mounting corroded | 0.34% |
| 46 | Towbar fault | 0.29% |
| 47 | Rear suspension fault | 0.28% |
| 48 | Tyre valve stem damaged | 0.25% |
| 49 | Brake pedal fault | 0.23% |
| 50 | Front suspension joint worn | 0.23% |
| 51 | Bonnet catch or hinge fault | 0.21% |
| 52 | Electrical wiring fault | 0.21% |
| 53 | Fuel tank corroded or leaking | 0.21% |
| 54 | Brake fluid level low or contaminated | 0.20% |
| 55 | Spring mounting corroded | 0.20% |
| 56 | Steering intermediate drop arm worn | 0.20% |
| 57 | Parking brake condition | 0.19% |
| 58 | Brake cable, rod, lever or linkage fault | 0.18% |
| 59 | Brake pedal movement restricted | 0.18% |
| 60 | Front suspension fault | 0.18% |
| 61 | Propshaft fault | 0.18% |
| 62 | Steering lock fault | 0.18% |
| 63 | Tyre size or type not matched | 0.17% |
| 64 | Dashboard warning lamp fault | 0.15% |
| 65 | Drag link end worn | 0.15% |
| 66 | Brake fluid leak | 0.14% |
| 67 | Electrical switch fault | 0.14% |
| 68 | Engine oil leak | 0.14% |
| 69 | Reversing lamp not working | 0.14% |
| 70 | Brake caliper fault | 0.13% |
| 71 | Bumper damaged or insecure | 0.12% |
| 72 | Headlamp levelling device fault | 0.11% |
| 73 | Suspension arm worn or corroded | 0.11% |
| 74 | Vehicle floor corroded | 0.11% |
| 75 | Load sensing valve fault | 0.09% |
| 76 | Steering arm worn | 0.09% |
| 77 | Steering free play excessive | 0.09% |
| 78 | Brake fluid warning light on | 0.08% |
| 79 | Brake lever fault | 0.08% |
| 80 | Driver door fault | 0.08% |
| 81 | Spare wheel fault | 0.08% |
| 82 | Body security fault | 0.08% |
| 83 | Tailgate damaged or insecure | 0.08% |
| 84 | Brake fluid reservoir fault | 0.07% |
| 85 | Brake valve fault | 0.07% |
| 86 | Driver airbag fault | 0.06% |
| 87 | Exhaust leak | 0.06% |
| 88 | Fuel pipe corroded or damaged | 0.06% |
| 89 | Driver seat fault | 0.05% |
| 90 | Handbrake cable fault | 0.05% |
| 91 | Hydraulic brake cylinder fault | 0.05% |
| 92 | Power steering pipe or hose leaking | 0.05% |
| 93 | Anti-roll bar worn or corroded | 0.04% |
| 94 | Fuel cap damaged or missing | 0.04% |
| 95 | Leaf spring eye worn or broken | 0.04% |
| 96 | Suspension linkage attachment bracket or mounting corroded | 0.04% |
| 97 | Exhaust emissions above threshold (non-catalyst) | 0.03% |
| 98 | Main beam warning light fault | 0.03% |
| 99 | Steering lock stop fault | 0.03% |
| 100 | Front passenger door fault | 0.03% |
| 101 | Handbrake lever fault | 0.03% |
| 102 | Passenger seat fault | 0.03% |
| 103 | Suspension retaining or locking device fault | 0.03% |
| 104 | Boot lid damaged or insecure | 0.02% |
| 105 | Brake master cylinder fault | 0.02% |
| 106 | Catalytic converter efficiency low | 0.02% |
| 107 | Mirror or camera fault | 0.02% |
| 108 | Speedometer fault | 0.02% |
| 109 | Steering operation fault | 0.02% |
| 110 | Transmission oil leak | 0.02% |
| 111 | Universal joint worn | 0.02% |
| 112 | Anchor bracket corroded | <0.01% |
| 113 | Body strengthening plate corroded | <0.01% |
| 114 | Brake linkage mounting fault | <0.01% |
| 115 | Brake master cylinder or servo mounting fault | <0.01% |
| 116 | Brake servo fault | <0.01% |
| 117 | CV joint worn | <0.01% |
| 118 | Dip switch fault | <0.01% |
| 119 | Electronic stability control fault | <0.01% |
| 120 | Fuel hose damaged or leaking | <0.01% |
| 121 | Halfshaft fault | <0.01% |
| 122 | Hinged tailboard damaged or insecure | <0.01% |
| 123 | Loading door damaged or insecure | <0.01% |
| 124 | Power steering pump fault | <0.01% |
| 125 | Power steering ram fault | <0.01% |
| 126 | Rear fog lamp warning light fault | <0.01% |
| 127 | Spring saddle corroded | <0.01% |
| 128 | Subframe mounting corroded | <0.01% |
| 129 | Suspension unit fault | <0.01% |
| 130 | Undertray damaged or missing | <0.01% |
| 131 | Bonded suspension condition | <0.01% |
| 132 | Steering coupling worn | <0.01% |
| 133 | King pin or swivel pin worn | <0.01% |
Showing all 133 reasons — scroll inside the table for the full list.
Mazda Bt-50 MOT Failures by Category
Total MOT failure occurrences for the Mazda Bt-50, 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 Mazda Bt-50 problems?
Based on analysis of 21K Mazda Bt-50 MOT tests from DVSA data, we have 25 identified common problems across 2 generations. The most frequently flagged issue is "Number plate lamp not working". Brakes is the most common problem category.
Which Mazda Bt-50 generation has the most problems?
The Mazda Bt-50 1st gen UN (2006-2011) (2006–2011) has the highest number of identified common problems (29). 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 Mazda Bt-50?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Mazda Bt-50 owners spot problems early. All submissions are reviewed before being added to the public database.
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