Womala Secondary Air Pump XR850044 for Jaguar XJ XF

Product Overview

The Secondary Air Injection Pump XR850044 is a genuine OE-grade emissions component engineered for a wide range of for Jaguar vehicles with petrol engines. Also known as the A.I.R. (Air Injection Reaction) pump, this component supplies fresh air to the exhaust system during cold starts, promoting secondary combustion of unburned hydrocarbons and helping the catalytic converter reach operating temperature more quickly . This system typically operates for less than 3 minutes after a cold start, reducing harmful hydrocarbon and carbon monoxide emissions .

Key Features

• Emissions reduction – injects fresh air into the exhaust system to reduce cold-start emissions

• OE-grade quality – genuine Jaguar OEM specification

• Direct-fit replacement – matches factory mounting points and connections

• For petrol engines only – compatible with multiple V6 and V8 engine variants

OE Cross-Reference

💡 Aftermarket equivalent available from Pierburg (7.00224.13.0) .

Vehicle Fitment

Engine compatibility details:

• XF: 5.0L without supercharger; 4.2L with supercharger 

• XJ: 3.0L V6 (2013–2019); 4.2L V8 (2004–2009) 

⚠️ Important: This pump is for petrol engines only. Not for diesel or naturally aspirated 5.0L V8 in XJ applications. Fitment varies by VIN range – verify before ordering .

Signs of Failure

• Check engine light – secondary air injection system-related DTCs

• Failed emissions test – elevated emissions during cold start

• Increased exhaust emissions – cold-start emissions exceeding limits

• Poor cold-start performance – rough idle or hesitation after cold start

💡 If there's a fault with the secondary air system, the emissions monitoring system will trigger a check engine light, which should be investigated and diagnosed by a competent person .

Critical – Verify Your VIN Before Ordering

Secondary air injection pumps are VIN‑, engine‑, and model‑year‑specific. Variations in engine type, production date, and emissions configuration affect fitment. 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. The pump is typically located in the engine bay, near the front of the vehicle. Inspect associated hoses and valves for damage during replacement.

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.
• Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
• Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Womala and Hella.