Jaguar E-Type Series 3 — Brake Master Cylinder

Vehicle Overview

Vehicle: Jaguar E-Type Series 3 (1971–1975)
Engine: 5.3 litre V12
Body styles: Roadster / 2+2 Coupé

The Series 3 E-Type uses a dual-circuit brake master cylinder, which is a critical distinction from earlier cars. Series 1 cars (1961–1968) used a single-circuit Girling unit; the dual-circuit setup was introduced from Series 2 onwards for improved safety.

The master cylinder is a Girling unit, mounted on the bulkhead on the right-hand side. Over time these units suffer from internal corrosion and seal degradation — a full rebuild or outright replacement is generally the smarter approach over patching a worn original.

Sourcing Recommendations

Specialist Jaguar supplier and the primary recommendation for Series 3 parts. Carries both rebuilt units and new old stock where available. The correct dual-circuit unit should be listed specifically for the Series 3.

Very strong on E-Type brake components with competitive pricing. Good cataloguing allows easy cross-referencing to confirm correct fitment.

Focuses specifically on Jaguar restoration parts. Recommended if you want a professionally rebuilt original unit with a warranty rather than a new replacement.

Fitment & Safety Notes

Series compatibility is critical. The Series 3 requires a dual-circuit master cylinder. Do not fit a single-circuit unit intended for a Series 1 car.
Have your chassis number ready when ordering. There were variations across the Series 3 production run and suppliers will need this to confirm correct fitment. Also confirm whether your car is the roadster or 2+2, as this may affect the specification.
  • If rebuilding the original unit yourself, Girling rebuild kits are still available and the job is straightforward — provided the bore is not pitted
  • A pitted bore means replacement, not rebuild — inspect carefully before committing to a rebuild route
  • The Series 3 brake system was uprated relative to earlier cars to handle the additional weight and performance of the V12 engine; maintaining the correct specification throughout is important