Minor Transmission
GM TH400 automatic (later cars), reliable
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Submit an updateXJ6 (Series I-III)
1968-1992 / Sedan / United Kingdom
// More XJ6 (Series I-III) problems
Other known issues
Common Transmission
Borg-Warner BW66 automatic (early cars)
Harsh shifts, slipping, delayed engagement. The gearbox overheats under sustained load.
Common Transmission
Power steering system leaks
Power steering fluid on the garage floor, heavy steering, groaning from the pump.
Minor Bodywork and Rust
Sill corrosion (structural)
Outer sills bubble and perforate. Inner sills rot silently behind trim. The car's rigidity decreases, doors sag, gaps become uneven, and the body flexes over bumps.
Minor Bodywork and Rust
Floor pan corrosion
Floor pans rot from underneath or from above (water sitting under carpets). In severe cases, you can see the road through the floor.
Common Bodywork and Rust
Rear wheel arch and lower rear quarter corrosion
Rust appears at the bottom of the rear wings, around the wheel arches, and in the lower panels between the wheels and boot.
Common Bodywork and Rust
Boot floor and spare wheel well corrosion
The boot floor rusts through, the spare wheel well fills with water, and the rot spreads to surrounding panels.