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1336551LR - Thermostat O-Ring by LAND ROVERCooling or Heating Part Land Rover Range Rover Discovery

1336551LR - Thermostat O-Ring

- €5,60
€5,60
€5,60 - €5,60
€5,60
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Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Thermostat O-Ring for the TDV6 diesel engine.

This O-ring provides the coolant seal at the thermostat housing on TDV6 diesel engines, preventing coolant from bypassing or leaking at the thermostat-to-housing interface. Replacement is recommended when removing the thermostat or when coolant seepage is present at the housing joint.
Vehicle Model Land Rover Discovery 3 2005-2009 (L319)
Land Rover Discovery 4 2010-2016 (L319)
Land Rover Discovery 5 2017+ (L462)
Fitment Notes DISCOVERY 3 2005-2009 — 2.7 V6 diesel (Lion), thermostat/housing gasket
DISCOVERY 4 2010-2016 — 2.7/3.0 V6 diesel, thermostat/housing gasket
DISCOVERY 5 2017+ — 3.0 V6 diesel, thermostat/housing gasket
Alternative Codes
1336551LR1336551

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 Thermostat O-Ring (1336551) and where does it fit?
The Thermostat O-Ring is the coolant seal between the thermostat and its housing on the V6 diesel engine, preventing leaks and coolant bypass at that joint. This is the genuine Land Rover part, number 1336551, fitting Discovery 3, Discovery 4 and Discovery 5 V6 diesel.
How many are needed and when should it be replaced?
One Thermostat O-Ring is typically needed per thermostat. Renew it whenever the thermostat or housing is removed on a Discovery 3, 4 or 5 V6 diesel, as the used seal usually won't reseal. Coolant seepage at the housing joint is the common sign it needs doing.
Can I reuse the old O-ring?
Don't reuse the old Thermostat O-Ring. Once it's been compressed against the housing it typically takes a permanent set and can leak coolant if refitted. On Discovery 3, 4 and 5 V6 diesel engines it's standard practice to fit a new seal with any thermostat work.
How do I confirm this fits my vehicle?
This genuine Land Rover O-Ring (1336551) fits Discovery 3 with the 2.7 V6 diesel, Discovery 4 with the 2.7 or 3.0 V6 diesel, and Discovery 5 with the 3.0 V6 diesel. Confirm your engine is the V6 diesel before ordering; other engines use a different seal.

Alternative & Related Options

Same part, different brands or quality grades. Click any option to view full details.

1 option
1336551 - Thermostat O-Ring
Aftermarket 1336551 - Thermostat O-Ring
Stock 4
€4,40 excl. VAT
View →