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.
LR181892 - Separator - Coolant Degas by LAND ROVERCooling or Heating Part Land Rover Range Rover

LR181892 - Coolant Degas Separator

- €114,00
€114,00
€114,00 - €114,00
€114,00
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Coolant Degas Separator, part of the engine cooling circuit on 2.0L Ingenium (AJ200) petrol applications.

The degas separator removes entrained air and gas from the coolant, venting it out of the flow so that only liquid coolant returns to circulation. Continuous deaeration prevents air pockets from forming in the system, maintaining consistent coolant flow and reliable heat transfer across the engine and radiator.
Vehicle Model Land Rover Defender New 2020+
Land Rover Discovery 5 2017+ (L462)
Land Rover Discovery Sport 2015+ (L550)
Range Rover Evoque 2019+ (L551)
Range Rover Velar 2017+ (L560)
Fitment Notes DISCOVERY 5 2017> — 2.0L AJ200/AJ20P4 Petrol (incl. PHEV)
DISCOVERY SPORT 2015> — 2.0L AJ200/AJ20P4 & 1.5L AJ20P3 Petrol (incl. PHEV)
NEW DEFENDER 2020 (L663) — 2.0L AJ200 Petrol (incl. PHEV)
NEW RANGE ROVER EVOQUE 2019 (L551) — 2.0L AJ20P4 & 1.5L AJ20P3 Petrol (incl. PHEV)
RANGE ROVER VELAR 2017 — 2.0L AJ200 Petrol
Alternative Codes
LR181892LRLR181892

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 coolant degas separator and what does it do?
The coolant degas separator removes trapped air and gas from the engine coolant, venting it so only liquid coolant returns to circulation. This continuous deaeration stops air pockets forming and keeps coolant flow and heat transfer consistent. It fits 2.0L Ingenium (AJ200) petrol applications.
Where does the degas separator sit in the cooling system?
The degas separator sits in the engine cooling circuit, typically mounted high in the system so it can collect and vent gas from the coolant flow. It's fitted to 2.0L AJ200 and AJ20P4 petrol engines, including PHEV, across the Defender L663, Discovery 5, Discovery Sport, Evoque and Velar.
Which engines does this degas separator fit?
This degas separator fits 2.0L AJ200/AJ20P4 petrol engines including PHEV on the Defender (L663), Discovery 5 and Velar. On Discovery Sport and Evoque (L551) it also covers the 1.5L AJ20P3 petrol. It's petrol only, so confirm your engine before ordering.
What happens if the degas separator fails?
A failed degas separator usually leaks coolant or lets air into the system, which can cause overheating, coolant loss and inconsistent cabin heat. Cracks in the plastic housing are a typical failure on these Ingenium petrol engines. Replacing it restores proper deaeration and stable coolant flow.