Ignition Coil & Iridium Spark Plugs for Land Rover Range Rover (2018-2022) 5.0L V8

Direct-Replacement Ignition Coils & Iridium Spark Plugs for 2018-2022 Land Rover Range Rover

What it Does: Restores factory ignition performance and eliminates misfires by providing a consistent, high-voltage spark to the combustion chamber under heavy load.

The Stock Range Rover L405 Ignition Shortcomings

The AJ133 5.0L Supercharged V8 generates massive under-hood temperatures and high cylinder pressures, placing extreme stress on the factory ignition system. Over time, the thermal cycling degradation causes the epoxy inside the OEM coils to micro-crack, leading to voltage leaks and secondary ignition failures. Simultaneously, standard nickel or platinum spark plugs experience accelerated electrode wear under supercharged boost pressures, widening the gap beyond acceptable specifications. This degradation commonly manifests as rough idling, poor fuel economy, hesitation under load, and persistent P0300-series misfire codes, significantly compromising engine drivability.

The Engineering Solution

This direct-replacement ignition coil and spark plug kit is engineered to withstand the harsh thermal and electrical demands of the 5.0L V8. The ignition coils feature a bolt-on, 3-pin design utilizing upgraded primary and secondary copper windings that deliver a stable 12V output. By minimizing resistance to a targeted 3-12KΩ range, these coils guarantee a rapid recharge cycle for consistent high-RPM performance. Paired directly with high-performance Iridium spark plugs, this kit ensures maximum durability. Iridium's extremely high melting point allows for a finer center electrode tip compared to traditional nickel, concentrating the spark for a more efficient burn. The plugs are pre-set to a precise 0.7mm-0.8mm gap, matching factory specifications to ensure perfect timing, while the 12mm thread diameter and 28mm reach guarantee proper indexing within the cylinder head.

Technical Specifications

Compatibility

• 2018 Land Rover Range Rover 5.0L V8
• 2019 Land Rover Range Rover 5.0L V8
• 2020 Land Rover Range Rover 5.0L V8
• 2021 Land Rover Range Rover 5.0L V8
• 2022 Land Rover Range Rover 5.0L V8

The Land Rover L405 Caliber

Designed for precise European electrical integration, this ignition package ensures a plug-and-play installation with zero check-engine lights, restoring the smooth, reliable power delivery expected from a premium supercharged luxury SUV.