Top three failure systems, annotated from 64 failed first-time tests. Arrows point to where the defect is found on the car.
Steering faults fail the Peugeot iOn 5.6× as often as they fail a petrol or diesel car
343 inspections in a single year make the ION a modestly documented electric car in the data. Suspension cause 25.9% of its failures; steering take 5.6× the share they take on petrol and diesel cars of the same age.
First-time failure rate
Overall first-time failure rate.
All electric cars in the data.
The Peugeot iOn fails 18.7% of first-time inspections. Suspension cause 25.9% of its failures.
Play at the straight-ahead
Steering take 17.3% of the defects that fail this car, 5.6× the share seen on petrol and diesel cars of the same age. The most common item in that group is "Steering rack gaiter or ball joint dust cover damaged or deteriorated", recorded 15 times in 2024.
Where it concentrates
The ION stays under the petrol fleet at every age we can measure. What it does fail on is unusually concentrated.
What to check
Check tyre age and tread across the full width, inner edge included. Electric cars wear tyres faster; a cheap mismatched set on a used car tells you how it was run. Have the suspension joints, bushes and springs checked on a lift. On this car it is a leading cause of failure and it is not visible from the outside. Ask for the full MOT history by registration on the free DVSA service: advisories are next year's failures.
Points hidden where fewer than 50 cars of that age were tested. Dashed lines are the same-age petrol and diesel fleets.
- Inspections
- 343
- Passed
- 266
- Failed
- 64
- Passed after repair
- 13
- Failure rate
- 18.7% (all EV 12.0%)
- Average age
- 8.4 years
- Top cause
- Suspension 25.9%
| System | This car (mark = petrol/diesel) | Share | vs petrol/diesel |
|---|---|---|---|
| Tyres | 18.9% | 1.3× less | |
| Suspension | 25.9% | 1.9× more | |
| Brakes | 14.6% | 1.3× less | |
| Visibility | 4.3% | 2.8× less | |
| Lighting | 14.6% | in line | |
| Steering | 17.3% | 5.6× more | |
| Body | 2.2% | 1.9× less |
- A tyre seriously damaged17
- A suspension joint dust cover severely deteriorated15
- Steering rack gaiter or ball joint dust cover damaged or deteriorated15
- Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc13
- Tyre tread depth not in accordance with the requirements11
- A suspension joint dust cover missing or no longer prevents the ingress of dirt etc9
Wording as printed by the tester, from the DVSA inspection manual.
- Visibility fail less often than on petrol and diesel cars (4.3% of defects vs 11.9%)
- Body fail less often than on petrol and diesel cars (2.2% of defects vs 4.1%)
- Suspension take a bigger share of failures than on petrol and diesel cars of the same age (25.9% vs 13.6%)
- Steering take a bigger share of failures than on petrol and diesel cars of the same age (17.3% vs 3.1%)
- ION343
Summaries written by us, never quotes; every entry links to its source. Owner reports have no denominator and never feed the failure rate.
- 343 inspections in 2024 make this one of the adequately-documented electric cars in the data.
- Steering take 5.6× the share of failures they take on petrol and diesel cars of the same age.
- It ranks 73 of 81 electric cars by first-time failure rate.
No battery health, no motor, no charging performance. The test covers brakes, suspension, steering, tyres, lights, visibility and structure. A car with a badly degraded battery passes as long as it stops and steers. Read this page as evidence about the chassis, not the powertrain. Cars are tested from their third year, so the newest model years are missing; every figure carries its sample size for that reason. Full methodology.