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.
RTC3812NGK - Spark Plug by NGK Land Rover Range Rover

RTC3812NGK - Spark Plug

- €5,10
€5,10
€5,10 - €5,10
€5,10
Tip: Log in to your account to unlock volume discounts on this item.
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.
Brand NGK
Spark Plug for the ignition system of 2.5L 4-cylinder and 3.5L V8 petrol engines.

The plug seals the combustion chamber and carries high-tension voltage from the ignition lead down the centre electrode to the gap, where the spark ignites the compressed charge. It uses a 14 mm thread with a 19 mm reach and a gasket seat, sealing against a washer rather than a tapered face.

The insulator nose is of the projected type, placing the electrode gap further into the combustion chamber. This exposes the tip to the incoming charge for better ignition and improved cold running, while the additional cooling from that same incoming charge helps keep the firing end clean at light load without overheating at high load.

Electrode gap should be checked against the engine specification before fitting, and the plug tightened to the specified torque on a clean seat.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes NGK N9YC spark plug.
DEFENDER 1987-2006 — 2.5 4-cyl petrol & 3.5 V8 petrol
DISCOVERY 1 1989-1998 — V8 EFI petrol (chassis FA393361 to WA799999)
RANGE ROVER CLASSIC 1986-1991 — V8 EFI petrol (to VIN HA610293)
Alternative Codes
RTC3812NGK

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

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 is the RTC3812 spark plug?
The RTC3812 is an NGK N9YC spark plug that ignites the air-fuel mixture in Land Rover petrol engines. It fits Defender 2.5 4-cylinder and 3.5 V8 petrol, plus Discovery 1 and Range Rover Classic V8 EFI. NGK is the original-equipment plug brand for these engines.
How many RTC3812 spark plugs do I need?
You'll need one spark plug per cylinder. A 2.5 4-cylinder Defender petrol typically takes four, while a 3.5 V8 in the Defender, Discovery 1 or Range Rover Classic takes eight. Plugs are sold individually here, so order the full set your engine needs.
Which Land Rover engines use the NGK N9YC plug?
The NGK N9YC fits Defender 2.5 4-cylinder petrol and 3.5 V8 petrol, Discovery 1 V8 EFI (chassis FA393361 to WA799999), and Range Rover Classic V8 EFI (to VIN HA610293). Confirm your engine type, as diesel and later petrol engines use different plugs.