#138
Genuine Jaguar Idle Control Valve (ICV) / Idle Speed Regulator, Lucas part number 73377E, removed from a 1992 Jaguar XJS 4.0 AJ6. This OEM valve regulates the amount of air bypassing the throttle body to maintain a stable idle speed under varying engine loads and temperatures. It is a direct replacement for a faulty or sticking idle control valve. Jaguar identifies this unit as part number DBC5727, with Lucas reference 73377E.
Key Features
* Genuine Jaguar / Lucas OEM idle control valve
* Lucas Part Number: 73377E
* Jaguar Part Number: DBC5727
* Controls engine idle speed by regulating bypass air
* Direct replacement for the original factory-fitted unit
Fits
* Jaguar XJS 4.0 AJ6 (1992–1996)
* Jaguar XJ40 3.2 & 4.0 AJ6 (1989–1994)
* May also fit selected Jaguar X300 3.2 & 4.0 models using the same idle control valve.
Compatibility depends on VIN and engine specification. Always compare the Lucas 73377E and Jaguar DBC5727 part numbers with your existing unit before purchasing.
Common Symptoms of Failure
* Unstable or erratic idle
* Engine stalling when coming to a stop
* High or low idle speed
* Difficult cold starting
* Engine hesitation caused by a sticking idle valve
* Check engine or idle control related faults
Condition
* Genuine used part.
* Fully tested and in good working condition.
* May show minor cosmetic marks consistent with normal use.
Part Numbers
* Jaguar: DBC5727
* Lucas: 73377E
Please compare the part numbers, connector and photographs with your existing idle control valve before purchasing to ensure correct compatibility. It is recommended to clean the throttle body and inspect all vacuum hoses when replacing the idle control valve for optimum performance.
Type: Throttle Body
Brand: Jaguar
Manufacturer Part Number: 73377E
MPN: 73377E
Reference OE/OEM Number: 54405779