At a Glance
No model-specific problems have been flagged for the Jaguar Xj Series I — nothing on this generation occurs significantly more often than the UK average. The data still shows 157 common MOT failure types below. Electrical is the most common MOT failure category. Based on 15K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Jaguar Xj Series I — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Jaguar Xj Series I MOT Pass Rate
Across 15K MOT tests from DVSA data, the Jaguar Xj Series I (1968–1973) has a fail rate of 23.7%.
All-time UK average fail rate: 34.9%
Tell Us About Your Problem
Help other Jaguar Xj Series I owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Jaguar Xj Series I owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Jaguar Xj Series I, grouped by the mileage they typically appear at.
391 distinct problems · 12,608 total occurrences in current filter
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Other Jaguar Xj Generations
Frequently Asked Questions
What are the most common Jaguar Xj Series I problems?
Based on DVSA MOT data for the Jaguar Xj Series I (1968–1973), we have identified 0 common problems. Electrical is the most common MOT failure category.
How reliable is the Jaguar Xj Series I?
This generation has 15K MOT tests on record with a 23.7% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Jaguar Xj Series I?
There are 157 distinct MOT failure types recorded for the Series I (1968–1973), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Jaguar Xj Series I?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Jaguar Xj owners spot problems early. All submissions are reviewed before being added to the public database.
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