Diesel Renault Laguna: MOT pass rate

62% of diesel Renault Lagunas pass the MOT first time, measured across 7,089 DVSA tests on that fuel type alone. Average mileage at test was 125,857.

Diesel against the other Renault Laguna versions

Why the fuel type changes the number

Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.

On the Renault Laguna specifically, petrol is the strongest at 62.9%, and this diesel version sits 0.2 points below the 62.2% model average.

What it means if you are buying one

There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.

Mileage is part of the answer

The average diesel Renault Laguna had covered 125,857 miles at test, against 94,178 for the petrol. That is high mileage, so timing belts, clutches, suspension bushes and corrosion are the items worth budgeting for rather than the MOT itself.

Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Renault Laguna page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Renault Laguna

1. A spring or spring component fractured or seriously weakened, 11.6% of tests (5.08x the national rate for this defect)
2. A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, 6.9% of tests (4.5x the national rate for this defect)
3. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 8.7% of tests (3.9x the national rate for this defect)
4. Brake pipe damaged or excessively corroded, 3.6% of tests (3.41x the national rate for this defect)
5. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 3.1% of tests (3.22x the national rate for this defect)
6. A suspension pin, bush or joint excessively worn, 13.3% of tests (2.65x the national rate for this defect)
7. A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, 2.3% of tests (2.58x the national rate for this defect)
8. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2.6% of tests (2.13x the national rate for this defect)
9. Parking brake efficiency below minimum requirement, 2.7% of tests (2.07x the national rate for this defect)
10. The aim of a headlamp is not within limits laid down in the requirements, 4.6% of tests (1.98x the national rate for this defect)

From 7,124 DVSA-tracked diesel Renault Laguna tests, 2024, split out from the Renault Laguna's other fuel types. DVSA testers marked 4.45% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.

Most common MOT advisories on a diesel Renault Laguna

Flagged but doesn't fail the car, a different list from the failures above.

1. A stub axle swivel pin and/or bush excessively worn, 4.1% of tests (6.44x the national rate for this defect)
2. Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 4.8% of tests (4.38x the national rate for this defect)
3. A brake hose ferrule excessively corroded, 5% of tests (3.96x the national rate for this defect)
4. Brake pipe damaged or excessively corroded, 16.8% of tests (2.72x the national rate for this defect), also fails
5. A suspension pin, bush or joint excessively worn, 32.2% of tests (2.41x the national rate for this defect), also fails
6. Brake disc or drum excessively weakened, insecure or fractured, 26.8% of tests (2.19x the national rate for this defect)
7. A spring or spring component fractured or seriously weakened, 10.4% of tests (2.19x the national rate for this defect), also fails
8. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 6.6% of tests (1.69x the national rate for this defect), also fails
9. Number plate inscription missing or illegible, 4.4% of tests (1.68x the national rate for this defect)
10. Brake disc or drum significantly and obviously worn, 4.7% of tests (1.49x the national rate for this defect)

From 7,124 DVSA-tracked diesel Renault Laguna tests, 2024.

Other Renault Laguna fuel types

• Petrol Renault Laguna - 62.9%

All Renault Laguna MOT data · Every model