Standard Ignition KS521 Ignition Knock (Detonation) Sensor - Rear

Ignition Knock Sensor for Land Rover Applications

The Standard Ignition KS521 is an ignition knock sensor built for select Land Rover vehicles with rear or N/A mounting positions. It uses a 2-terminal, plug-in oval connector design with a bolt-mount attachment and metal/plastic construction for direct replacement service.

Compatible with Land Rover Defender 110, Discovery, Discovery Sport, Range Rover, Range Rover Velar, Range Rover Evoque, Range Rover Sport, Defender 90, and Defender 130 applications listed below.

Key Features

• Standard Ignition KS521 ignition knock (detonation) sensor
• 2-terminal design with female connector and male blade terminals
• Oval, plug-in connector for straightforward electrical connection
• Bolt-mount attachment with snap-fit style retention
• Metal and plastic construction for underhood durability
• Direct-fit replacement for select Land Rover rear and N/A positions

Detailed Description

The KS521 is an emission control sensor that monitors engine knock or detonation signals so the engine control system can respond appropriately. This part cross-references Land Rover OE applications through interchange numbers such as LR112513 and DKS265 for the same application. Standard Ignition KS521 is listed for 2020-2025 Land Rover Range Rover, 2021-2023 Land Rover Discovery, 2018-2023 Land Rover Range Rover Evoque, and other select Land Rover models shown in the fitment data.

Use this sensor when servicing a Land Rover knock sensor circuit that requires a bolt-mounted, plug-in oval connector design. The part number KS521 is also a useful reference when verifying replacement selection across multiple Land Rover platforms.

What It Helps Address

• Knock sensor fault codes related to detonation monitoring
• Engine performance issues tied to inaccurate knock signal input
• Illumination of the check engine light from sensor circuit problems
• Rough running caused by incorrect ignition timing response
• Failed emissions-related sensor diagnostics

Installation Notes and Tips

Confirm the connector shape, terminal count, and mounting style before installation. This sensor uses a female connector, male blade terminals, and a bolt-mount attachment, so the existing harness and mounting point should match the OE configuration. Verify the vehicle position carefully, since fitment includes both rear and N/A locations depending on model and year. The KS521 should be installed on the exact application listed in the fitment data for proper operation.

Quality Assurance

Standard Ignition supplies replacement electrical and engine management components for service applications, and the KS521 is cataloged to match the listed Land Rover fitments and interchange references.

• Fits 2024-2025 Land Rover Defender 110, N/A
• Fits 2021 Land Rover Defender 110, N/A
• Fits 2024-2025 Land Rover Discovery, N/A
• Fits 2025 Land Rover Discovery Sport, rear
• Fits 2018-2023 Land Rover Discovery Sport, rear
• Fits 2022-2025 Land Rover Range Rover, N/A
• Fits 2020 Land Rover Range Rover, N/A
• Fits 2024-2025 Land Rover Range Rover Velar, N/A
• Fits 2022-2023 Land Rover Defender 110, rear
• Fits 2020 Land Rover Defender 110, rear
• Fits 2023 Land Rover Defender 130, N/A
• Fits 2021-2023 Land Rover Defender 90, rear
• Fits 2021-2023 Land Rover Discovery, rear
• Fits 2018-2023 Land Rover Range Rover Evoque, rear
• Fits 2018-2023 Land Rover Range Rover Velar, rear
• Fits 2021-2022 Land Rover Range Rover Sport, N/A
• Fits 2021 Land Rover Range Rover, rear
• Fits 2019-2020 Land Rover Range Rover Sport, rear