Common problems

Peugeot 406 common problems

What MOT testers find on the Peugeot 406: the parts that fail or get advisories most often at each age, against all cars of the same age. From 13,073 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

At 22 years, the most tested age

Lights and electrics fails per 100 MOTs (n=2,519)19.6

All cars at 22 years (n=913,980)19.7

Brakes advisories and minor defects per 100 MOTs (n=2,519)36.8

All cars, same age (n=913,980)33.2

What stands out

Brakes fails show up on 17.0 of every 100 MOTs of a Peugeot 406 at 22 years old (n=2,519), against 13.1 for all cars of that age (n=913,980).
Exhaust, emissions and leaks fails are less common: 6.0 per 100 MOTs against 7.0 for all cars at the same age.
The fail item testers record most often at 22 years: component mounting prescribed areas: prescribed area excessively corroded significantly reducing structural strength, on 5.8 per 100 MOTs (all cars 3.5).
The most common advisory or minor defect: engine oil leaks: leak, but not excessive, on 19.2 per 100 MOTs.

Problems by part at 22 years

How many of every 100 MOTs found a fail, or an advisory or minor defect, in each area. A test with faults in two areas counts in both.

Peugeot 406 at 22 years (n=2,519) against all cars at 22 years (n=913,980). Per 100 MOTs.
Area	Fails	All cars	Advisories	All cars
Lights and electrics	19.6	19.7	19.5	15.5
Suspension	17.3	15.2	36.6	34.4
Brakes	17.0	13.1	36.8	33.2
Body and structure	11.8	9.4	18.0	16.3
Windscreen, wipers and mirrors	7.6	7.4	6.4	6.4
Exhaust, emissions and leaks	6.0	7.0	20.7	16.8
Tyres	5.7	5.6	28.4	24.2
Seat belts and airbags	5.5	3.1	1.8	1.7
Steering	3.0	4.0	6.2	6.7
Number plates and VIN	0.9	0.8	7.7	6.8
Road wheels	0.1	0.4	0.4	1.0

What testers fail most on the 406 at 22 years

Fail items on the Peugeot 406 at 22 years (n=2,519), per 100 MOTs, with all cars at the same age (n=913,980).
Item	Area	Per 100 MOTs	All cars	Typical repair (estimate)
Component mounting prescribed areas: prescribed area excessively corroded significantly reducing structural strength	Suspension	5.8	3.5
Headlamp aim: projected beam image is obviously incorrect	Lights and electrics	4.9	3.2	£16 to £39 per car (rough guide)
Handbrake too weak	Brakes	4.6	2.5
Exhaust system: has a major leak of exhaust gases	Body and structure	4.1	2.2	£182 to £263 per section
Side/position light not working	Lights and electrics	4.0	4.6	£10 to £47 per lamp
Wipers not clearing screen	Windscreen, wipers and mirrors	3.8	3.5	£15 to £30 per blade
Brake light not working	Lights and electrics	3.3	3.7	£10 to £47 per lamp
Driveshaft CV boot split	Body and structure	3.0	2.9	£88 to £196 per boot (rough guide)
Service brake imbalance: across an axle	Brakes	2.9	1.3
Service brake performance: excessively binding	Brakes	2.7	1.4	£55 to £267 per wheel (rough guide)

Early warnings: advisories and minor defects at 22 years

Advisories and minor defects are recorded, but the car still passes. Across all cars, a part with an advisory or minor defect failed at the next MOT 5.5 times in 100 (n=88,666,940 pairs of consecutive MOTs), against 0.3 times in 100 when the same part had none (n=12,936,860,350).

Advisories and minor defects on the Peugeot 406 at 22 years (n=2,519), per 100 MOTs, with all cars at the same age (n=913,980).
Item	Area	Per 100 MOTs	All cars	If it needs replacing (estimate)
Engine oil leaks: leak, but not excessive	Exhaust, emissions and leaks	19.2	15.1
Brake discs: worn, pitted or scored, but not seriously weakened	Brakes	19.2	10.1	£148 to £376 per axle (rough guide)
Tread depth: worn close to legal limit/worn on edge	Tyres	18.4	13.7	£88 to £145 per tyre
Tyre condition: slightly damaged/cracking or perishing	Tyres	10.3	10.4	£88 to £145 per tyre
Coil spring: corroded	Suspension	9.8	8.0
Exhaust system: has a minor leak of exhaust gases	Body and structure	9.2	5.6	£182 to £263 per section
Rigid brake pipes: corroded, covered in grease or other material	Brakes	8.8	15.9	£137 to £392 per car (rough guide)
Sub-frame: corroded but not seriously weakened	Suspension	7.6	4.2
Registration plates: deteriorated but not likely to be misread	Number plates and VIN	7.5	6.8	£23 to £63 per plate (rough guide)
Linkage ball joints: ball joint has slight play	Suspension	6.2	2.0	£33 to £102 per link (rough guide)

Repair estimates are a guide for an independent garage: labour at the national median local garage rate (median £78 an hour from 65 garages, ONS price quotes) times estimated labour hours, plus a parts band. Labour hours and most parts bands are estimates, not quotes, and prices vary by model, engine and region. A warning light fault shows the cost of the diagnosis only.

How problems change with age

Fails per 100 MOTs in the three most common areas at 22 years. Ages with fewer than 1,000 tests are not shown.
Age	Tests (n)	Lights and electrics	Suspension	Brakes
19 years	1,252	22.3	18.5	15.9
20 years	2,024	23.2	17.2	19.0
21 years	2,512	21.3	16.8	17.9
22 years	2,519	19.6	17.3	17.0
23 years	2,074	18.8	15.7	15.4
24 years	1,606	16.3	15.8	14.2
25 years	1,086	15.2	15.3	14.2

What to check on a viewing

On the Peugeot 406, testers most often record component mounting prescribed areas: prescribed area excessively corroded significantly reducing structural strength; headlamp aim: projected beam image is obviously incorrect; handbrake too weak. Look at these first, then the areas below.

Lights and electrics

With someone outside, try every light: dipped and main beam, indicators, brake lights, fog lights and number plate lamps.
Check that the warning lights come on with the ignition and go out once the engine runs.
Look for misted, cracked or yellowed headlamp lenses.

Suspension

Listen for knocks or clonks over speed bumps and rough roads on the test drive.
Push down hard on each corner: the car should settle at once rather than keep bouncing.
Look behind the wheels for broken or heavily rusted coil springs and split rubber bushes.
Check that the car sits level and that no tyre is worn on one edge only.

Brakes

On the test drive the car should stop in a straight line without pulling, juddering or grinding.
Look at the discs through the wheels for a deep lip, heavy rust or scoring.
Check that the handbrake or electronic parking brake holds the car on a slope.
Ask when the pads, discs and brake fluid were last changed, and for the receipts.

Ask for the car's MOT history and service record: advisories that repeat from one year to the next show what has been left. GOV.UK MOT history.

Questions

What are the most common problems on the Peugeot 406?

At 22 years, the age with the most MOT tests (2,519), the fail items testers record most often on the Peugeot 406 are component mounting prescribed areas: prescribed area excessively corroded significantly reducing structural strength (5.8 per 100 MOTs), headlamp aim: projected beam image is obviously incorrect (4.9 per 100 MOTs), handbrake too weak (4.6 per 100 MOTs). The most common advisories or minor defects are engine oil leaks: leak, but not excessive (19.2) and brake discs: worn, pitted or scored, but not seriously weakened (19.2).

Which parts of the Peugeot 406 fail more often than on other cars?

At 22 years: brakes (17.0 per 100 MOTs against 13.1 for all cars); body and structure (11.8 per 100 MOTs against 9.4 for all cars); seat belts and airbags (5.5 per 100 MOTs against 3.1 for all cars). Compared with 913,980 MOTs of all cars the same age.

Peugeot 406 problems by area

Other Peugeot models

All Peugeot models · Common problems by make

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

The all cars figures cover all class 4 vehicles (cars and light vans) tested at the same age.

Looking at a Peugeot 406?

These figures describe the model, not the car in front of you. Found one you might buy? See what the VetTheCar Buying Report covers, or use the tools that work without a registration.

See a sample report Car tools · MOT fail rates by model · Compare models by MOT record

Repair estimates: ONS consumer price quotes for local garage labour (09/2025 to 08/2026), the MOT inspection manual for defect wording, and estimated labour hours and parts bands. Not affiliated with or endorsed by ONS.

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources