LR121802 | Timing Chain Guide - 3.0L AJ20P6 Petrol | Range Rover, Defender, Discovery
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To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: LR121802 - Timing Chain Guide
LR121802 is a timing chain guide for 3.0L AJ20P6 petrol engines. Fitted inside the timing gear assembly adjacent to sprockets, tensioners and rails, the guide controls the route and alignment of the timing chain to manage lateral and vertical movement, reduce contact with surrounding components and limit accelerated wear. It resists side-load forces and helps stabilise the chain under varying speed and load to maintain correct valve timing. Replacement of worn guides is typically carried out alongside inspection of the chain, tensioner and sprockets to maintain the timing system's operating condition.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Discovery 5 (2017-) - 3.0L AJ20P6 Petrol High - From VIN L2000001
- New Defender (2020-) - 3.0L AJ20P6 Petrol High - From VIN L2000001
- New Range Rover Sport (2023-) - 3.0L AJ20P6 Petrol High; 3.0L AJ20P6 Petrol PHEV
- Range Rover (2013-2022) - 3.0L AJ20P6 Petrol High - From VIN KA000001
- Range Rover Sport (2014-2022) - 3.0L AJ20P6 Petrol High - From VIN KA000001
- Range Rover Velar (2017-) - 3.0L AJ20P6 Petrol High - From VIN MA000001
Frequently Asked Questions
LR121802 locates and supports the timing chain within the timing gear assembly of 3.0L AJ20P6 petrol engines. The guide controls the chain route and alignment adjacent to sprockets, tensioners and rails, managing lateral and vertical movement to reduce contact, wear and noise. When a guide shows wear or damage it should be replaced and the chain, tensioner and sprockets inspected at the same time.
| Model | Variant |
|---|---|
| Land Rover Discovery 5 (2017-) | 3.0L AJ20P6 Petrol High (From VIN L2000001) |
| Land Rover New Defender (2020-) | 3.0L AJ20P6 Petrol High (From VIN L2000001) |
| Land Rover New Range Rover Sport (2023-) | 3.0L AJ20P6 Petrol High; 3.0L AJ20P6 Petrol PHEV |
| Land Rover Range Rover (2013-2022) | 3.0L AJ20P6 Petrol High (From VIN KA000001) |
| Land Rover Range Rover Sport (2014-2022) | 3.0L AJ20P6 Petrol High (From VIN KA000001) |
| Land Rover Range Rover Velar (2017-) | 3.0L AJ20P6 Petrol High (From VIN MA000001) |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Replace the guide if it is worn, cracked or otherwise damaged. Replacement is typically performed during timing system service and when replacing the timing chain, tensioner or sprockets; consult the vehicle service schedule or a technician for specific guidance.
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