Womala Oil Water Separator XR858493 for Jaguar XJ XE XF

Product Overview

The Crankcase Breather Hose XR858493 (also referenced as XR858490) is an OE-grade crankcase ventilation hose engineered for 2.0L turbocharged petrol engines in select for Jaguar and for Land Rover vehicles. This hose connects the oil separator to the intake manifold, routing crankcase blow-by gases back into the combustion chamber for re-burning. It also manages crankcase pressure, preventing oil leaks and sludge buildup.XR858490 is the current Jaguar replacement part number, and LR025615 is the Land Rover equivalent reference.

⚠️ Important: This breather hose is specifically for 2.0L petrol engines. It is not compatible with diesel or other engine variants.

Key Features

• Routes crankcase gases – connects the oil separator to the intake manifold, returning blow-by gases for combustion

• Regulates crankcase pressure – prevents pressure buildup that can cause oil leaks and sludge

• OE-grade quality – available as Genuine Jaguar, Genuine Land Rover, VAICO, and other quality alternatives

• Direct-fit replacement – matches factory routing and connections

• Complete with PCV valve – some versions include the integrated pressure control valve

OE Cross-Reference

Aftermarket equivalents: VAICO V48-0506 (with seal) · Gates EMH276 · Eurospare LR025615

💡 Note: XR858490 and XR858493 are interchangeable references for the same crankcase breather hose assembly. LR025615 is the Land Rover equivalent.

Technical Specifications

Jaguar Applications

Land Rover Applications

⚠️ Important: This breather hose fits 2.0L petrol engine variants in the models listed above. Confirm your engine type and VIN before ordering.

Signs of Failure

• Rough idle or misfire – unbalanced air-fuel mixture from a faulty or clogged PCV valve

• Increased oil consumption – pressure buildup forcing oil into the intake manifold

• Oil leaks – excessive crankcase pressure pushing oil past seals and gaskets

• Sludge buildup – blocked valve preventing blow-by gases from escaping, causing oil and condensation to mix

• Whistling noise – from the breather system under vacuum

💡 Known Failure Issue: The PCV diaphragm inside the oil separator is a common failure point on 2.0L engines. A small pinhole or tear in the diaphragm causes oil vapour to be drawn into the turbo and burned, leading to increased oil consumption and oil residue in the intercooler piping. This is an easy-to-overlook but relatively inexpensive repair — replacing the membrane alone (rather than the complete valve assembly) is often sufficient. Symptoms typically appear after 5 years or 80,000 km.

Critical – Verify Your VIN Before Ordering

Crankcase breather hoses are VIN- and engine-specific. 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 breather hose, inspect the oil separator and PCV valve for wear or blockage. It is recommended to replace the PCV membrane or complete valve assembly at the same time to prevent repeat failure. Clear any crankcase ventilation fault codes after installation.

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

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