Back to website first page

Range Rover ECU common failure symptoms

PLEASE USE PHOTOS TO IDENTIFY CORRECT ECU FOR YOUR VEHICLE

RANGE ROVER 3.5 (to 1990), ROVER SD1, TVR and MORGAN V8 (3.5 LITRE ENGINE - NON CAT) fitted with LUCAS 4CU fuel injection ECU and moving flap airflow meter, 1985-1989. ECU part numbers PRC 4764/7440/others. ECU is large rectangular alloy box with 6 bolts retaining top and bottom covers and is located under front r/h seat. Click here to see photographs of ECU and airflow meter for this system.

NORTH AMERICAN RANGE ROVER (3.5 LITRE ENGINE - WITH CAT) DURING THE PERIOD 1985 TO 1989 (approx) 3.5 litre Range Rovers were produced with the Lucas 13CU hot wire airmass fuel injection system for the North American market. This system can be identified by the ECU which is a large pressed steel (painted black) rectangular box with top cover held in place by 4 'pop' rivets. We believe this system was only shipped to North American markets but please email if you know better! Part numbers PRC 6977/5053/others. Please click here to see photo of this ECU.

DISCOVERY WITH 3.5 OR 3.9 LITRE ENGINE (CAT & NON CAT) fitted with Lucas 14CU fuel injection ECU and hot wire airmass meter, 1990 to 1995. ECU part numbers PRC 8138/9059/others(3.5) and PRC 9010/others(3.9). During manufacture of these model ranges, AMR prefix part numbers were introduced. ECU is black painted cast alloy box with 4 cover retaining screws. Click here to see photographs of ECU and airflow meter for this system.

RANGE ROVER WITH 3.9/4.0/4.2 LITRE ENGINE (CAT & NON CAT) fitted with Lucas 14CU fuel injection ECU and hot wire airmass meter, 1990 to 1995. ECU part numbers PRC 6999/7081 - superceded by 8702 and 9061/ 9611/9515/others. During manufacture of these model ranges, AMR prefix part numbers were introduced. ECU is black painted cast alloy box with 4 cover retaining screws. Click here to see photographs of ECU and airflow meter for this system.

RANGE ROVER WITH 4.6 LITRE ENGINE fitted with GEMS engine management ECU. ECU has cast alloy frame with pressed steel anodised covers. There are three distinctive 36 way connectors on one side. ECU part numbers are prefixed AMR. Click here to see photograph of ECU for this system.

Discovery TDi and V8 MFi 'spider' related non start problems 1996 - 1999
Discovery and Defender TDi5 non-start problems 1998 - to date
Range Rover 4 litre misfire problems
LPG Gas Conversion problems
Air Suspension problems
Body (Electrical) Control Module (BECM) problems
HVAC climate control display ECU problems
Driver's seat memory ECU problems
Useful Range Rover technical links

Back to website first page