2020 Jeep Grand Cherokee — MOT failures & pass rate
The 2020 Jeep Grand Cherokee passed 89.2% of its 259 recorded MOT tests. Large SUVs of a similar age fail 9.0% of the time, so this is 1.8pp worse than the group it competes with. Failures cluster in lighting & signalling, brakes and visibility.
What the MOT record shows
No single area dominates — lighting & signalling (6.2%) and brakes (3.9%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are wipers, headlamp aim and brake discs — wipers alone was recorded 7 times.
Advisories point at the next bill rather than this one: brakes was flagged on 15.8% of tests without failing them.
The trend is worsening — 8.8% of tests failed in 2023 against 10.3% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 6.2% | 16 |
| 2 | Brakes | 3.9% | 10 |
| 3 | Visibility | 3.1% | 8 |
| 4 | Tyres | 2.3% | 6 |
| 5 | Emissions & environmental | 1.5% | 4 |
| 6 | Suspension | 1.2% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 7 |
| 2 | Headlamp aim | 7 |
| 3 | Brake discs | 6 |
| 4 | Headlamp | 5 |
| 5 | Stop lamp | 5 |
| 6 | Registration plates | 5 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 15.8% | 41 |
| 2 | Tyres | 13.9% | 36 |
| 3 | Other defects | 3.1% | 8 |
| 4 | Lighting & signalling | 2.7% | 7 |
| 5 | Visibility | 2.7% | 7 |
| 6 | Suspension | 1.9% | 5 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 135 | 7.4% |
| 30-60k | 91 | 11.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 184 | 12.0% |
| Petrol | 75 | 8.0% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 80 | 8.8% |
| 2024 | 76 | 11.8% |
| 2025 | 68 | 10.3% |
What to check before buying a 2020 Grand Cherokee
On a 2020 Grand Cherokee, lighting & signalling is what the MOT record says goes wrong most — it appeared in 6.2% of tests. Check these areas before you commit.
- Lighting & signalling (6.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (3.9% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
- Visibility (3.1% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2020 Jeep Grand Cherokees pass their MOT?
89.2% of the 259 2020 Jeep Grand Cherokee MOT tests in this dataset passed — a 10.8% fail rate.
What is the most common MOT failure on a 2020 Jeep Grand Cherokee?
Lighting & signalling, recorded in 6.2% of tests, followed by brakes (3.9%).
Does the 2020 Grand Cherokee get worse with mileage?
Its MOT fail rate rises from 7.4% in the 0-30k band to 11.0% in the 30-60k band.
Methodology & source. Based on 259 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.