All generations and engines together · 84,844 MOT tests in the 2025 data · typical mileage at age 7: 55k
Worse than most family hatchbacks, by age and by mileage. Watch brakes and suspension. A used buy worth some caution. Check the MOT history for repeating brakes advisories before you go.
Split by first-registration year. Cars registered in a changeover year can belong to either generation.
Owner folklore from forums and the motoring press, with how well each report stands up. Most of it never shows up in an MOT, which is why this section exists at all.
Direct injection means there's no fuel washing over the intake valves, so carbon cakes up over time and can choke the engine and clog injectors. Honest John records a case needing a £3,000 clean-up around 70,000 miles, and owner forums put the first proper clean at 60,000 to 90,000 miles depending on how the car's driven. Symptoms are a rough idle, hesitation or a misfire that a dealer scan won't always flag straight away.
On the first two generations the 1.6 HDI's injectors could 'weep' and wreck the engine, with Honest John citing a County Court precedent against Mazda over it and bills around £5,400. The 2.2 diesel has its own weak point: botched DPF regeneration lets unburned fuel dilute the sump oil, and one owner's engine seized from oil starvation at 81,000 miles. Both are specific to the diesel engines fitted before the 2013 facelift generation.
The touchscreen and rotary-controller infotainment fitted from 2013 onward is prone to freezing, dropping Android Auto or Apple CarPlay mid-journey, or the sat-nav rebooting itself repeatedly. A soft reset or a full software reinstall via USB usually clears it for a while, but owners report it coming back. It's an annoyance rather than a safety issue, but a full unit replacement isn't cheap.
Owners report pads and discs going well before the mileage you'd expect: one 2016 car had its discs replaced at 57,000 miles then needed them again by 75,000, before the pads themselves were even due. Squealing is often put down to rust and brake dust building up on the disc face faster than normal. This lines up with the measured MOT data for the Mazda 3, where brakes are the standout advisory category for the family-hatch class, so the pattern buyers describe matches what's actually failing at test time.
The Teves Mk60 ABS/ESP module on the first two generations throws random ABS and traction-control warning lights as it ages. A dealer will bill around £1,300 to £1,350 for a new module, though a specialist can often repair and recalibrate the original for closer to £400. Mazda has made goodwill contributions on some out-of-warranty cases, which is the nearest thing to an acknowledgement, though there's no formal recall.
The i-stop system can misbehave, throwing dashboard warnings, and on some cars the charging system fails alongside it so the battery won't hold charge. It's turned up on both an early (2010) car and a nearly-new (2019) one, in the latter case bad enough that the buyer rejected the car within 30 days and got a full refund. Worth checking on any age of Mazda 3, not just older ones.
Ranked from this model’s own MOT record, then from what owners report.
Saveable checklistThe physical checks its own defect data says are worth your time, most telling first.
These judge the seller’s upkeep rather than the model, and they are where the haggling money is.
The physical checks its own defect data says are worth your time, most telling first.
These judge the seller’s upkeep rather than the model, and they are where the haggling money is.
The physical checks its own defect data says are worth your time, most telling first.
These judge the seller’s upkeep rather than the model, and they are where the haggling money is.
The physical checks its own defect data says are worth your time, most telling first.
These judge the seller’s upkeep rather than the model, and they are where the haggling money is.
The physical checks its own defect data says are worth your time, most telling first.
These judge the seller’s upkeep rather than the model, and they are where the haggling money is.
Drawn from the reports above rather than the MOT data. These are the model-specific ones.
Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.
Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.
The rows that judge the model rather than its keeper. 32,563 tests in this band.
Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.
Same segment (Family hatchbacks), best MOT record first. Compare before you shortlist.