Vehicle & Part Overview

The 1980 Jaguar XJ-S (5.3L V12) utilizes a high-pressure external electric fuel pump to support the Lucas EFI system. This applies to both "Pre-HE" and "HE" (High Efficiency) models produced during this transition period.

  • Location: External, inline unit located in the boot (trunk), positioned near the spare tire and the battery.
  • Jaguar OEM Part Number: CBC5657 (This superseded the earlier C45041)
  • Cross-reference (Bosch): 0580464125 (Bosch was the original manufacturer for the Lucas-badged units).

Sourcing Recommendations

1. SNG Barratt
Specialist Jaguar parts supplier carrying both Genuine Jaguar boxed parts and high-quality Bosch alternatives.

2. Moss Motors
Supplier for North American owners, carrying a range of Lucas and Bosch components for the XJ-S.

3. Maxpeedingrods
Offers high-pressure external pumps and fuel system components for modified builds or high-flow setups.

4. RockAuto
Source for the Bosch-branded version of the pump, which is often identical to the OEM Jaguar part.

Safety & Fitment Notes

### ⚠️ SAFETY CRITICAL: FUEL SYSTEM
Jaguar V12 fuel systems operate at high pressure (approx. 30-36 PSI). A leak over a hot engine block is a significant fire hazard. Never use "universal" or low-quality pattern pumps. They may fail prematurely or fail to maintain the specific flow rate required for the V12, potentially leading to a lean-running condition and engine damage. Stick to OEM (Bosch/Lucas) or high-quality performance replacements.

Pro-Restorer Maintenance Tips:

  • Replace the Fuel Filter: Always replace the fuel filter (Part No: DAC3001) when installing a new pump. A clogged filter is a primary cause of pump failure due to increased strain.
  • Inspect the Sump Tank: The XJ-S features a small surge tank below the main tank that is prone to internal rust. If brown sediment is present in the old pump or filter, the sump tank must be cleaned or replaced to prevent damage to the new pump.
  • Upgrade Fuel Hoses: Original 1980s rubber hoses are not compatible with modern ethanol-blended fuels. It is recommended to upgrade high-pressure rubber lines in the boot and engine bay to SAE J30R9 (or better) ethanol-rated hose.
  • Specification Check: Verify if the vehicle is North American or European spec, as this may impact specific emissions-related fuel components.