Mass Air Flow Sensor MAF – Defender, Discovery, Range Rover GEMS

Restore smooth running and reliable performance with this Mass Air Flow Sensor (MAF), designed for Land Rover models fitted with the GEMS V8 engine. The sensor accurately measures incoming air and communicates with the ECU to maintain the correct fuel-air mixture—critical for power, idle stability, and fuel economy.

This unit directly fits:

• Discovery I (1996–1999) – 4.0L GEMS

• Range Rover P38 (1995–1999) – 4.0L & 4.6L GEMS

• Defender  – 4.0L GEMS

If your Rover is suffering from rough idle, stalling, or poor throttle response, a faulty MAF is often the cause. Replacing it with this correct-fit sensor restores drivability without complicated modifications.

Supersessions ERR5595A, MHK100800

FAQs
Q: Will this MAF work on Bosch-engine trucks?
A: No, this part only fits GEMS V8 engines. Bosch-equipped Rovers (1999+) require a different sensor.

Q: Do I need special tools to install it?
A: No. It installs with basic hand tools by loosening the intake clamps and swapping the unit.

Q: What symptoms mean my MAF has failed?
A: Common signs include poor idle, hesitation on acceleration, and diagnostic fault codes.