XJ6 (Series I-III)

1968-1992 / Sedan / United Kingdom

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

Critical Brakes

Brake servo failure

Symptoms

Very hard brake pedal, poor stopping performance. The car feels like it has no brakes.

Cause

The vacuum servo diaphragm fails, the check valve sticks, or vacuum lines leak.

Fix

Test the servo by pressing the brake pedal with the engine off, then starting the engine, the pedal should drop slightly.

If it doesn't, the servo is faulty.

Rebuild or replace.

Reconditioned servos are available.

Budget $500-1,000 AUD.

Cost mentioned in fix

Budget $500-1,000

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// More XJ6 (Series I-III) problems

Other known issues

Common Brakes

Caliper seizure

Uneven braking, pulling to one side, excessive heat from one wheel, brake drag.

Common Brakes

Brake disc warping

Judder through the steering wheel or brake pedal under braking.

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.

View all 28 XJ6 (Series I-III) problems