Used car guide

2018 Kia Carens diesel: common problems and MOT failures

What MOT testers find on the diesel Kia Carens first registered in 2018 (diesel cars only): we looked at the 2,921 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

2,921MOTs of 2018 diesel cars, done in 2023–2025
75%pass first time (all 2018 cars: 83%)
8,400typical miles a year
1.7×the usual rate for brake pads

What goes wrong more than usual on a 2018 Kia Carens diesel?

Parts flagged at MOT more often on the 2018 Kia Carens diesel than on all cars registered in 2018.

  • Brake pads1.7× usual
    Kia Carens
    18.9% All 2018 cars
    10.9%

    Failed outright at MOT: 4.4%, against 2% of all 2018 cars. The rest were advisories or minor defects.

    Rough price £75–£175 (one axle) ClickMechanic

    At the viewing: Listen for squealing or grinding when braking, and look through the wheel at how much pad is left.

  • Airbag warning light11× usual
    Kia Carens
    2.2% All 2018 cars
    0.2%

    Failed outright at MOT: 2.1%, against 0.2% of all 2018 cars. The rest were advisories or minor defects.

    Rough price £10–£80 our estimate

    At the viewing: Ask a friend to check every light while you work the switches: indicators, brake lights, fog lights and reversing lights.

  • Braking performance2.8× usual
    Kia Carens
    3.3% All 2018 cars
    1.2%

    Failed outright at MOT: 0.8%, against 0.4% of all 2018 cars. The rest were advisories or minor defects.

    Rough price £100–£350 our estimate

    At the viewing: On a quiet road, brake firmly from about 30mph. The car should stop straight without pulling.

  • Headlights2.8× usual
    Kia Carens
    2.8% All 2018 cars
    1%

    Failed outright at MOT: 2.8%, against 0.9% of all 2018 cars. The rest were advisories or minor defects.

    Rough price £40–£400 our estimate

    At the viewing: Check both headlights on dipped and full beam, and look for cloudy or cracked lenses.

Common 2018 Kia Carens diesel MOT failures and advisories

The share of 2018 Kia Carens diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Tyres
    33% 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
    28% 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.

  • Lights and electrics
    12% of testsRough price £10–£80

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

  • Wipers, windscreen and mirrors
    6% of testsRough price £15–£250

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

  • Seats and seatbelts
    4% of testsRough price £80–£250

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

  • Suspension
    4% 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.

Questions to ask the seller before buying a 2018 Kia Carens 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 brake pads? (Flagged at MOT 1.7× as often on the 2018 Kia Carens diesel as on other cars the same age.)
  2. Any recent work on the airbag warning light? (Flagged at MOT 11× as often on the 2018 Kia Carens diesel as on other cars the same age.)
  3. Any recent work on the braking performance? (Flagged at MOT 2.8× as often on the 2018 Kia Carens diesel as on other cars the same age.)
  4. Can I see the service history and receipts for any big jobs?

Looking at a Kia Carens?

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 Kia Carens compared

YearMOT testsMost flagged
2019269Tyres 32%
20175,533Tyres 32%
20165,331Brakes 35%
20156,361Brakes 38%
20146,477Brakes 38%
20134,112Brakes 40%
2012272Brakes 42%
20111,008Suspension 49%
2010969Suspension 47%
20093,208Suspension 54%
20082,865Suspension 58%
20071,285Suspension 60%
2006809Brakes 54%
2005434Brakes 55%
2004294Brakes 55%
2003177Brakes 51%
2002–Too few tests
2001–Too few tests
2000–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 Kia Carens cars first registered in 2018. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score