O2 Oxygen Sensor Upstream Downstream for Land Rover Range Rover (2003-2005) 4.4L

Direct-Fit Oxygen Sensor Replacement Set for 2003-2005 Land Rover Range Rover (L322)

What it Does: The complete 4-piece O2 Oxygen Sensor Set replaces degraded factory lambda probes on the 2003-2005 Land Rover Range Rover to re-establish accurate closed-loop air-fuel metering and resolve catalytic diagnostic trouble codes.

The Stock Land Rover Range Rover Sensor Degradation

Operating inside the high-heat exhaust stream of the M62TUB44 4.4L V8, factory oxygen sensors suffer from thermal fatigue, carbon contamination, and internal zirconia element wear after years of service. Aged sensors generate sluggish response times and false lean voltage signals. This causes the engine control module to overcompensate with excessive fuel trims, leading to poor fuel economy, engine hesitation, failed emissions inspections, and persistent check engine lights (DTCs P0130 through P0161, P0420, and P0430).

The Engineering Solution

This comprehensive set provides both upstream air-fuel regulation sensors and downstream catalyst monitoring sensors engineered to OEM specifications. Featuring high-durability planar ceramic sensing elements and integrated fast-acting heaters, each sensor rapidly reaches optimal operating temperature. Factory-correct harness lengths, high-temp insulated wire sleeves, and OE-keyed pin connectors ensure direct-fit installation into standard M18x1.5 exhaust bungs with zero wire splicing or pin repointing required.

What's Included

• 2 Upstream Oxygen Sensors (Pre-Catalytic Converter)
• 2 Downstream Oxygen Sensors (Post-Catalytic Converter)

Technical Specifications

Compatibility

• 2003 Land Rover Range Rover Base / HSE 4.4L V8
• 2004 Land Rover Range Rover Base / HSE 4.4L V8
• 2005 Land Rover Range Rover Base / HSE 4.4L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the L322 Range Rover?

Yes, this is a direct fit for the 2003-2005 Land Rover Range Rover equipped with the M62TUB44 BMW-sourced 4.4L V8 engine. This kit does not fit 2006 and newer models equipped with Jaguar-derived 4.4L or 4.2L engines.

Should anti-seize lubricant be used during installation?

Apply high-temperature anti-seize compound strictly to the bung threads only, taking extreme care not to contaminate the active ceramic sensing tip.

The Land Rover Precision Standard

Preserving precise European engine management requires matched lambda resistance across both exhaust banks, preventing converter burnout and ensuring immediate check-engine-light-free operation.