LR121807 | Drive Chain Idler - 3.0L AJ20P6 Petrol | Range Rover, Range Rover Sport, Discovery 5
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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: LR121807 - Drive Chain Idler
LR121807 is a drive chain idler, located within the timing gear and used to guide and support the drive chain on 3.0L AJ20P6 petrol engines. The idler provides a controlled bearing surface to maintain chain path and geometry within the timing gear, helping to reduce uneven wear on the chain and adjacent sprockets. Correct orientation and service condition of the idler are important for reliable timing system operation. This component is used on high-output 3.0L AJ20P6 petrol engines, including the petrol PHEV variants listed; when replacing the idler, follow the manufacturer's guidance on installation sequence and torque for the timing gear assembly.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Discovery 5 (2017-) - 3.0L AJ20P6 Petrol - From VIN L2000001
- New Defender (2020-) - 3.0L AJ20P6 Petrol - From VIN L2000001
- New Range Rover Sport (2023-) - 3.0L AJ20P6 Petrol, 3.0L AJ20P6 Petrol PHEV
- Range Rover (2013-2022) - 3.0L AJ20P6 Petrol - From VIN KA000001
- Range Rover Sport (2014-2022) - 3.0L AJ20P6 Petrol - From VIN KA000001
- Range Rover Velar (2017-) - 3.0L AJ20P6 Petrol - From VIN MA000001
Frequently Asked Questions
The LR121807 idler positions and supports the drive chain inside the timing gear to maintain correct chain path and tension. If the idler or its bearing surface becomes worn or damaged it can cause uneven chain and sprocket wear, noisy operation or timing faults; inspect the idler during timing or engine service and replace if signs of wear are present. When fitting a replacement follow the manufacturer's instructions for correct orientation and installation sequence.
| Model | Variant |
|---|---|
| Land Rover New Range Rover Sport (2023-) | 3.0L AJ20P6 Petrol; 3.0L AJ20P6 Petrol PHEV |
| Land Rover Range Rover (2013 - 2022) | 3.0L AJ20P6 Petrol - From VIN KA000001 |
| Land Rover Range Rover Sport (2014 - 2022) | 3.0L AJ20P6 Petrol - From VIN KA000001 |
| Land Rover Discovery 5 (2017-) | 3.0L AJ20P6 Petrol - From VIN L2000001 (Nitra Plant Build) |
| Land Rover Range Rover Velar (2017-) | 3.0L AJ20P6 Petrol - From VIN MA000001 |
| Land Rover New Defender (2020-) | 3.0L AJ20P6 Petrol - From VIN L2000001 (Nitra Plant Build) |
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.
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