Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Jaguar XJRFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) (18.30.01): Removal

Disconnect the battery ground cable. BATTERY
Remove the cowl vent screen. FRONT END BODY PANELS (2003.5-09)
Remove the cabin air filter.
- Detach the cabin air filter.
- Remove the cabin air filter.
  
  Fig 1: Removing Cabin Air Filter
  Courtesy of JAGUAR CARS, INC.
Remove the cabin air filter housing.

Fig 2: Removing Cabin Air Filter Housing
Courtesy of JAGUAR CARS, INC.
Remove the engine compartment panel.
Remove the engine compartment panel retaining bolt.
- Remove the engine compartment panel.
  
  Fig 3: Removing Engine Compartment Panel
  Courtesy of JAGUAR CARS, INC.

NOTE: The engine control module (ECM) electrical connector retaining bolt remains captive in the electrical connector.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.