XJ6 (Series I-III)

1968-1992 / Sedan / United Kingdom

All XJ6 (Series I-III) problems All workshop issues

Minor Electrical

Central locking and door lock failures

Symptoms

Central locking won't operate, or works on some doors but not others. Key won't turn in the door lock.

Cause

Vacuum-operated actuators (Series 2 and 3) fail when diaphragms split or vacuum lines perish. Lock barrels wear. Microswitches fail.

Fix

Check the vacuum supply first.

Replace perished vacuum lines.

Replace failed actuators.

Rebuild or replace worn lock barrels.

Budget $200-600 for a complete central locking overhaul.

Cost mentioned in fix

Budget $200-600 for a

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// More XJ6 (Series I-III) problems

Other known issues

Common Electrical

Lucas ignition failure (Series 1 and 2)

Misfiring, rough running, hard starting, random stalling. The car runs on five cylinders or fewer.

Common Electrical

Alternator and charging system failure

Battery goes flat, warning light stays on, instruments dim at idle, car won't start.

Minor Electrical

Electric window failure

Windows won't go up or down, move slowly, or stop halfway.

Common Electrical

Instrument gauge failures

Temperature gauge, fuel gauge, or oil pressure gauge reads incorrectly or not at all. Warning lights illuminate randomly.

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.

View all 28 XJ6 (Series I-III) problems