Common problems

Toyota Prius common problems

What MOT testers find on the Toyota Prius: the parts that fail or get advisories most often at each age, against all cars of the same age. From 614,268 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

At 6 years, the most tested age

Lights and electrics fails per 100 MOTs (n=61,042)4.8

All cars at 6 years (n=10,382,720)4.7

Tyres advisories and minor defects per 100 MOTs (n=61,042)13.1

All cars, same age (n=10,382,720)24.3

What stands out

No part area of the Toyota Prius fails more than 1 point per 100 MOTs above all cars at 6 years old (n=61,042; all cars n=10,382,720).
Brakes fails are less common: 1.6 per 100 MOTs against 3.5 for all cars at the same age.
The fail item testers record most often at 6 years: wipers not clearing screen, on 2.0 per 100 MOTs (all cars 1.8).
The most common advisory or minor defect: tread depth: worn close to legal limit/worn on edge, on 8.7 per 100 MOTs.

Problems by part at 6 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.

Toyota Prius at 6 years (n=61,042) against all cars at 6 years (n=10,382,720). Per 100 MOTs.
Area	Fails	All cars	Advisories	All cars
Lights and electrics	4.8	4.7	1.5	1.9
Tyres	3.9	5.6	13.1	24.3
Windscreen, wipers and mirrors	2.8	3.3	2.0	3.1
Brakes	1.6	3.5	6.8	16.9
Suspension	1.5	2.9	3.4	6.1
Body and structure	0.2	0.8	0.3	1.2
Exhaust, emissions and leaks	0.2	1.3	0.2	1.2
Number plates and VIN	0.2	0.2	0.8	1.0
Steering	0.2	0.5	0.6	0.8
Road wheels	0.2	0.2	0.1	0.6
Seat belts and airbags	0.1	0.4	0.1	0.2

What testers fail most on the Prius at 6 years

Fail items on the Toyota Prius at 6 years (n=61,042), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	Typical repair (estimate)
Wipers not clearing screen	Windscreen, wipers and mirrors	2.0	1.8	£15 to £30 per blade
Tyre tread below 1.6 mm	Tyres	1.6	2.0	£88 to £145 per tyre
Registration plate lamp(s): inoperative in the case of a single lamp or all lamps	Lights and electrics	1.2	0.4	£10 to £47 per lamp
Brake pads under 1.5 mm	Brakes	1.0	1.9	£72 to £174 per axle (rough guide)
Rear fog lamp: not working	Lights and electrics	0.7	0.2	£10 to £47 per lamp
Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords	Tyres	0.6	1.4	£88 to £145 per tyre
Side/position light not working	Lights and electrics	0.6	0.5	£10 to £47 per lamp
Tyre with cords exposed	Tyres	0.5	1.0	£88 to £145 per tyre
Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt	Suspension	0.5	0.1	£33 to £102 per link (rough guide)
Washers: provides insufficient washer liquid	Windscreen, wipers and mirrors	0.4	0.9	£2 to £14 per car (rough guide)

Early warnings: advisories and minor defects at 6 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 Toyota Prius at 6 years (n=61,042), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	If it needs replacing (estimate)
Tread depth: worn close to legal limit/worn on edge	Tyres	8.7	14.3	£88 to £145 per tyre
Brake pads: wearing thin	Brakes	3.6	9.3	£72 to £174 per axle (rough guide)
Tyre condition: slightly damaged/cracking or perishing	Tyres	2.9	9.2	£88 to £145 per tyre
Brake discs: worn, pitted or scored, but not seriously weakened	Brakes	2.8	7.3	£148 to £376 per axle (rough guide)
Tread depth: worn close to legal limit/worn on edge	Tyres	1.7	2.0	£88 to £145 per tyre
Wipers: blade defective	Windscreen, wipers and mirrors	1.1	1.1
Brake discs: worn, but not excessively	Brakes	1.0	2.5	£148 to £376 per axle (rough guide)
Nail in tyre	Other	0.9	2.0
Windscreen: damaged but not adversely affecting driver's view	Windscreen, wipers and mirrors	0.8	1.8
Registration plate lamp(s): inoperative in the case of multiple lamps or light sources	Lights and electrics	0.8	1.0

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 6 years. Ages with fewer than 1,000 tests are not shown.
Age	Tests (n)	Lights and electrics	Tyres	Windscreen, wipers and mirrors
3 years	28,060	6.5	4.1	3.1
4 years	39,706	5.7	3.9	3.0
5 years	51,570	4.6	3.7	2.9
6 years	61,042	4.8	3.9	2.8
7 years	57,819	6.2	4.1	2.9
8 years	54,363	7.8	4.2	2.8
9 years	49,088	10.4	4.7	3.4
10 years	46,033	13.0	4.6	3.6
11 years	34,291	14.9	4.8	3.9
12 years	32,777	17.4	5.4	4.8
13 years	31,757	18.3	5.9	5.2
14 years	30,592	19.0	6.0	5.5
15 years	30,003	18.8	5.8	5.4
16 years	23,892	19.5	5.9	5.8
17 years	19,103	19.8	6.1	5.9
18 years	13,208	20.5	6.1	5.9
19 years	6,691	20.4	6.2	5.9
20 years	3,217	21.5	5.2	5.8
21 years	1,056	21.6	6.4	6.5

Mileage

At 6 years, Toyota Prius cars showing under 30,000 miles failed 8.2% of MOTs (n=5,443); the band that failed most, over 150,000 miles, failed 18.1% (n=12,599). For pass and fail rates by age, see Toyota Prius MOT fail rates.

What to check on a viewing

On the Toyota Prius, testers most often record wipers not clearing screen; tyre tread below 1.6 mm; registration plate lamp(s): inoperative in the case of a single lamp or all lamps. 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.

Tyres

Check the tread across the full width of all four tyres, and the spare if there is one.
Look for cuts, bulges and cracking in the sidewalls.
Wear on one edge only can point to worn suspension or the tracking being out.

Windscreen, wipers and mirrors

Look for chips or cracks in the windscreen, above all in front of the driver.
Run the wipers and washers: they should clear the screen without smearing.
Check that the mirrors are present, secure and not cracked.

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 Toyota Prius?

At 6 years, the age with the most MOT tests (61,042), the fail items testers record most often on the Toyota Prius are wipers not clearing screen (2.0 per 100 MOTs), tyre tread below 1.6 mm (1.6 per 100 MOTs), registration plate lamp(s): inoperative in the case of a single lamp or all lamps (1.2 per 100 MOTs). The most common advisories or minor defects are tread depth: worn close to legal limit/worn on edge (8.7) and brake pads: wearing thin (3.6).

Which parts of the Toyota Prius fail more often than on other cars?

None by more than 1 point per 100 MOTs at 6 years, compared with 10,382,720 MOTs of all cars the same age.

Toyota Prius problems by area

Other Toyota models

All Toyota 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 Toyota Prius?

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