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104123735LR - Coolant Bleed Hose – Engine to Expansion Tank

- €123,20
€123,20
€123,20 - €123,20
€123,20
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Coolant Bleed Hose connects the engine to the coolant expansion tank, forming part of the cooling system's deaeration circuit.

This hose returns trapped air and surplus coolant from the engine to the expansion tank, allowing the system to self-bleed and maintain correct coolant level and pressure. Fitted on 3.0L AJ20P6 petrol applications.
Vehicle Model Land Rover Defender New 2020+
Land Rover Discovery 5 2017+ (L462)
Fitment Notes DISCOVERY 5 2017> — 3.0L AJ20P6 Petrol High (Nitra build), from VIN M2000001. Coolant bleed hose (engine to expansion tank)
NEW DEFENDER 2020 (L663) — 3.0L AJ20P6 Petrol High (Nitra build), from VIN L2000001. Coolant bleed hose (engine to expansion tank)
Alternative Codes
104123735LR104123735

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 does the coolant bleed hose do?
The coolant bleed hose returns trapped air and surplus coolant from the engine to the expansion tank on the 3.0L AJ20P6 petrol engine. It lets the cooling system self-bleed, keeping the coolant level and pressure correct and preventing air locks after a refill.
Which models does this coolant bleed hose fit?
This coolant bleed hose fits the 3.0L AJ20P6 petrol engine in the Discovery 5 (2017+) from VIN M2000001 and the New Defender L663 (2020+) from VIN L2000001. Its Land Rover part number is 104123735. Confirm your engine and build with the VIN.
When does a coolant bleed hose need replacing?
A coolant bleed hose typically needs replacing when it cracks or perishes, letting the system draw in air or lose coolant. Signs include persistent air locks, fluctuating temperature, or coolant seepage near the expansion tank. Replacing it restores proper self-bleeding of the cooling system.