Used car guide

2005 SEAT Altea diesel: common problems and MOT failures

What MOT testers find on the diesel SEAT Altea first registered in 2005 (diesel cars only): we looked at the 1,212 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

1,212MOTs of 2005 diesel cars, done in 2023–2025
51%pass first time (all 2005 cars: 57%)
7,200typical miles a year
2.7×the usual rate for drive shaft (cv) joints

What goes wrong more than usual on a 2005 SEAT Altea diesel?

Parts flagged at MOT more often on the 2005 SEAT Altea diesel than on all cars registered in 2005.

  • Drive shaft (CV) joints2.7× usual
    SEAT Altea
    18.9% All 2005 cars
    7.1%

    Failed outright at MOT: 8.8%, against 3.3% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £60–£350 our estimate

    At the viewing: Drive slowly on full steering lock in both directions and listen for clicking. Look for split rubber boots behind the front wheels.

  • Suspension arm bushes and joints1.8× usual
    SEAT Altea
    19% All 2005 cars
    10.5%

    Failed outright at MOT: 5.2%, against 2.4% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £120–£180 (one arm) ClickMechanic

    At the viewing: Listen for clunks over bumps and feel for the steering wandering. Worn arm bushes show as cracked rubber near the wheels.

  • Sub-frame2.2× usual
    SEAT Altea
    12.1% All 2005 cars
    5.4%

    Failed outright at MOT: 0.1%, against 0.3% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £300–£1,000 our estimate

    At the viewing: Look underneath at the frame the suspension bolts to. Flaky rust or holes are expensive to fix.

  • Airbag warning light3.8× usual
    SEAT Altea
    6.4% All 2005 cars
    1.7%

    Failed outright at MOT: 5.9%, against 1.5% of all 2005 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.

  • Diesel smoke emissions4.4× usual
    SEAT Altea
    4% All 2005 cars
    0.9%

    Failed outright at MOT: 3.6%, against 0.8% of all 2005 cars. The rest were advisories or minor defects.

    Rough price £175–£900 (catalytic converter) ClickMechanic

    At the viewing: Look for smoke when revving the warm engine and for engine or DPF warning lights.

Better than most

Rigid brake pipes: 2.6% here, against 14.9% of all 2005 cars. Exhaust system: 4.6% here, against 9.4% of all 2005 cars.

Common 2005 SEAT Altea diesel MOT failures and advisories

The share of 2005 SEAT Altea diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    52% 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.

  • Brakes
    44% 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.

  • Tyres
    40% 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.

  • Lights and electrics
    37% of testsRough price £10–£80

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

  • Oil and fluid leaks
    20% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Driveshafts and joints
    19% of testsRough price £60–£350

    At the viewing: On full steering lock, drive slowly and listen for clicking from the front wheels.

Questions to ask the seller before buying a 2005 SEAT Altea 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 drive shaft (cv) joints? (Flagged at MOT 2.7× as often on the 2005 SEAT Altea diesel as on other cars the same age.)
  2. Any recent work on the suspension arm bushes and joints? (Flagged at MOT 1.8× as often on the 2005 SEAT Altea diesel as on other cars the same age.)
  3. Any recent work on the sub-frame? (Flagged at MOT 2.2× as often on the 2005 SEAT Altea diesel as on other cars the same age.)
  4. Can I see the service history and receipts for any big jobs?

Looking at a SEAT Altea?

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 SEAT Altea compared

YearMOT testsMost flagged
20151,359Tyres 32%
20142,097Tyres 34%
20133,616Tyres 34%
20124,480Suspension 38%
20113,599Suspension 41%
20103,666Suspension 46%
20094,323Suspension 48%
20084,893Suspension 49%
20075,754Suspension 50%
20063,518Suspension 50%
2004720Suspension 48%

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of SEAT Altea cars first registered in 2005. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score