1978 Jaguar Xj6 — MOT History by Age
How cars manufactured in 1978 perform at MOT as they age
Data from official DVSA MOT testing records
Insufficient data for same-age comparison.
How This Car Ages
Pass rate progression for the 1978 Jaguar Xj6 as it ages.
Bar chart showing pass rate by car age from 31 to 39 years
📊 View as table
| Age | Pass Rate | Tests |
|---|---|---|
| 31 yrs | 64.7% | 34 |
| 33 yrs | 66.7% | 33 |
| 34 yrs | 65.6% | 32 |
| 35 yrs | 59.0% | 39 |
| 36 yrs | 75.8% | 33 |
| 38 yrs | 62.5% | 40 |
| 39 yrs | 63.9% | 36 |
Pass Rate Trend
How the 1978 Jaguar Xj6 pass rate changes as it ages, from first MOT to most recent.
Trend shows declining over 7 years
📊 View as table
| Built | Pass Rate | Tests |
|---|---|---|
| 2017 (39 yrs) | 63.9% | 36 |
| 2016 (38 yrs) | 62.5% | 40 |
| 2014 (36 yrs) | 75.8% | 33 |
| 2013 (35 yrs) | 59% | 39 |
| 2012 (34 yrs) | 65.6% | 32 |
| 2011 (33 yrs) | 66.7% | 33 |
| 2009 (31 yrs) | 64.7% | 34 |
Year-by-Year MOT Results
Common MOT Failures
Top failure categories across all test years for 1978 Jaguar Xj6, with age trends.
How Failures Change With Age
Comparing failure rates between the youngest and oldest test years.
| Category | At Youngest | At Oldest | Change | Trend |
|---|---|---|---|---|
| Suspension | 17.6% (31 yrs) | 61.1% (39 yrs) | +43.5%
| 🔴 ↑ |
| Steering | 11.8% (31 yrs) | 16.7% (39 yrs) | +4.9%
| 🔴 ↑ |
| Lamps, Reflectors and Electrical Equipment | 20.6% (31 yrs) | 25.0% (39 yrs) | +4.4%
| 🔴 ↑ |
| Exhaust, Fuel and Emissions | 14.7% (31 yrs) | 16.7% (39 yrs) | +2.0%
| 🔴 ↑ |
Other Manufacture Years
Looking for the best year to buy? See the full comparison on the Jaguar Xj6 page →
About This Data
This page shows how Jaguar Xj6 cars manufactured in 1978 perform at MOT as they age. Data spans from 2009 to 2017, covering 247 tests. Pass rates naturally decline with age as components wear.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.