Used car guide

2021 Renault Megane diesel: common problems and MOT failures

What MOT testers find on the diesel Renault Megane first registered in 2021 (diesel cars only): we looked at the 444 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

Small sample: there were only 444 MOTs of these cars during 2023–2025, so treat the percentages as rough. The known faults below don't depend on it.

444MOTs of 2021 diesel cars, done in 2023–2025
77%pass first time (all 2021 cars: 87%)
16,400typical miles a year
3×the usual rate for wipers

What goes wrong more than usual on a 2021 Renault Megane diesel?

Parts flagged at MOT more often on the 2021 Renault Megane diesel than on all cars registered in 2021.

  • Wipers3× usual
    Renault Megane
    10.4% All 2021 cars
    3.5%

    Failed outright at MOT: 8.1%, against 2.2% of all 2021 cars. The rest were advisories or minor defects.

    Rough price £15–£60 our estimate

    At the viewing: Test the wipers and washers on every speed.

Common 2021 Renault Megane diesel MOT failures and advisories

The share of 2021 Renault Megane diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    27% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Brakes
    16% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Wipers, windscreen and mirrors
    14% of testsRough price £15–£250

    At the viewing: Check for chips in the driver's view, and test the wipers and washers.

  • Lights and electrics
    6% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Suspension
    5% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Seats and seatbelts
    2% of testsRough price £80–£250

    At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

Questions to ask the seller before buying a 2021 Renault Megane diesel

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

  1. Any recent work on the wipers? (Flagged at MOT 3× as often on the 2021 Renault Megane diesel as on other cars the same age.)
  2. Can I see the service history and receipts for any big jobs?

Looking at a Renault Megane?

Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.

Other years

Every year of the Renault Megane compared

YearMOT testsMost flagged
2026–Too new for MOT data
2025–Too new for MOT data
2024–Too new for MOT data
2023107Tyres 21%
20221,316Tyres 28%
20203,197Tyres 27%
20197,486Tyres 30%
20185,846Tyres 33%
201714,157Tyres 35%
201614,443Tyres 33%
201519,249Suspension 42%
201420,994Suspension 48%
201321,314Suspension 47%
201226,144Suspension 50%
201137,917Suspension 51%
201045,802Suspension 52%
200925,570Suspension 53%
200816,025Lights and electrics 52%
200717,266Lights and electrics 53%
200610,400Lights and electrics 55%
20056,462Brakes 50%
20043,295Brakes 49%
20032,344Brakes 46%
20024,388Lights and electrics 43%
20012,839Lights and electrics 41%
20001,156Lights and electrics 43%
1999363Lights and electrics 37%
1998216Brakes 39%
1997127Brakes 41%
1996–Too few tests

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Renault Megane cars first registered in 2021. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score