Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.

RTC4937 - Inhibitor Switch – ZF

Sold out
- €400,00
€400,00
€400,00 - €400,00
€400,00
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Inhibitor Switch mounts on the ZF automatic transmission.

It prevents the engine from cranking unless the selector is in Park or Neutral, and signals selector position to the starting and reverse lamp circuits. Fitted to the ZF automatic transmission.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — ZF automatic transmission inhibitor switch
DISCOVERY 1 1989-1998 — ZF automatic transmission inhibitor switch
RANGE ROVER CLASSIC 1986-1994 — ZF automatic transmission inhibitor switch
Alternative Codes
RTC4937

Not available

This item is currently unavailable. Contact us for alternatives.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the ZF inhibitor switch do?
The ZF inhibitor switch prevents the engine from cranking unless the selector is in Park or Neutral, and it signals selector position to the starter and reverse lamp circuits. It's mounted on the ZF automatic transmission.
Which Land Rovers use this ZF inhibitor switch?
This inhibitor switch fits the ZF automatic transmission used on the Defender, Discovery 1, and Range Rover Classic. Any of these with the ZF auto box takes the same switch. If your vehicle has a manual gearbox, it doesn't apply.
What are the symptoms of a faulty inhibitor switch?
A faulty inhibitor switch usually shows as no crank in Park or Neutral, reverse lights that don't work, or the engine starting in gears other than Park and Neutral. On the ZF box these faults often trace to a worn or misadjusted switch rather than the starter.

Frequently Bought With

Products most often purchased alongside this one.

3 items
FTC2957HD - Clutch release fork HD - D1/Defender 83-06/RRC
Aftermarket

FTC2957HD - Clutch release fork HD - D1/Defender 83-06/RRC

€22,70 excl. VAT
NRC7768 - Gearbox Crossmember
Aftermarket

NRC7768 - Gearbox Crossmember

€120,00 excl. VAT
WFX000210 - Vdo Fuel Pump Assembly
OEM

WFX000210 - Vdo Fuel Pump Assembly

€350,00 excl. VAT