Womala Hot water pipe LR075991 for Land Rover LR4 Discovery 4

Product Overview

The Heater Manifold Pipe LR075991 is a Genuine OE-grade cooling system component for for Land Rover and for Jaguar vehicles with the 3.0L AJ126 V6 supercharged petrol engine . This pipe routes hot coolant between the cylinder heads and the heater core, playing a critical role in cabin heating and engine temperature regulation . LR122710 is the current replacement part, superseding LR075991 and multiple earlier numbers .

Key Features

• Coolant distribution – routes coolant between cylinder heads and heater core

• OE-grade quality – genuine Land Rover / Jaguar specification; upgraded metal alternatives available 

• Direct-fit replacement – matches factory mounting points; no modifications required

• For 3.0L V6 supercharged petrol engines – AJ126 engine family

• Supersession – LR075991 → LR122710 (from VIN JA726230 / KA792020) 

OE Cross-Reference

💡 Supersession Note: LR122710 replaces LR075991, LR041788, LR087558, and LR109401. For vehicles from VIN JA726230 / KA792020, LR122710 is the required replacement .

Vehicle Fitment

VIN Notes: LR122710 applies from VIN JA726230 and KA792020 – confirm your VIN range before ordering .

⚠️ Important: LR075991 / LR122710 is specifically for the 3.0L V6 supercharged petrol engine (AJ126). Not for diesel, naturally aspirated, or V8 variants. Fitment varies by VIN range – verify before ordering.

Signs of Failure

• Coolant leaks – visible drips from the heater pipe area

• Loss of cabin heat – heater blows cold air

• Engine overheating – coolant loss causing temperature issues

• Sweet coolant smell – from the engine bay

💡 The factory plastic pipe can become brittle and crack over time – upgraded metal alternatives are available for enhanced durability . This is a known failure point on AJ126 engines.

Critical – Verify Your VIN Before Ordering

Heater pipes are VIN‑, engine‑, and model‑year‑specific. VIN cut-offs apply (JA726229 / KA792019). Provide your VIN – our team confirms exact compatibility before dispatch. We cannot accept returns for misordered parts without VIN verification.

💡 Installation Tip: Professional installation recommended. When replacing the heater pipe, inspect all cooling system hoses and connections for wear. Replace coolant with OEM-specified fluid at the correct mixture ratio after installation.

Technical Specifications

Why Choose Us

Contact us for bulk orders or VIN‑checked quotes.

Specifications subject to change; images for reference only.Aftermarket replacement – not affiliated with Jaguar Land Rover.

Frequently Asked Questions

• Extensive Industry Experience: 13 years specializing in Auto Parts auto parts with precise product matching and technical solutions.
• Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
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• Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Womala and Hella.