ERR3291 - Thermostat – 300TDi – 88C

- €10,40

€10,40

€10,40 - €10,40

€10,40

Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Thermostat for the 2.5L 300TDi diesel engine, operating within the thermostat housing at the top of the cooling circuit.

The thermostat regulates coolant flow between the engine and the radiator based on coolant temperature. Below the opening threshold, coolant is directed through the bypass circuit to accelerate warm-up and maintain consistent operating temperature; once the thermostat opens, it allows full coolant circulation through the radiator.

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 — 2.5L I4 300TDi Diesel Turbo — 88°C, seal included
DISCOVERY 1 1989-1998 — 2.5L 300TDi (to VIN MA081992), 2.5 TDi EGR (Gem) — 88°C, seal included
RANGE ROVER CLASSIC 1992-1994 — 2.5L TDi (from VIN JA610294) — 88°C, seal included

Alternative Codes

ERR3291ERR3291ES

In stock 14 units

10 · Gouda 4 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

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 ERR3291 thermostat do on a 300TDi engine?

The ERR3291 is an 88°C thermostat for the 2.5L 300TDi diesel. It controls coolant flow to the radiator, opening at 88°C to allow the engine to reach and maintain correct operating temperature. It fits the Defender, Discovery 1, and Range Rover Classic with 300TDi engines.

What are the symptoms of a failing thermostat on a 300TDi?

A thermostat stuck open causes the engine to run below normal temperature, with reduced heater output and increased fuel consumption. One stuck closed leads to overheating. Both failure modes typically show as the temperature gauge sitting unusually high or low.

How is this thermostat different from the 200TDi version?

Both the 200TDi and 300TDi thermostats open at 88°C, but they aren't interchangeable. ERR3291 is the 300TDi-specific part. Confirm your engine code before ordering, as fitting the wrong thermostat risks incorrect temperature regulation.