4121218 | Valve Rocker Arm - Cologne 4.0 V6 EFI - Discovery 3 (2005-2009)
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: 4121218 - Valve Rocker Arm
4121218 is a Valve Rocker Arm fitted to the cylinder head of the Cologne 4.0 Petrol V6 EFI SOHC engine. The rocker arm transmits camshaft motion via the cam follower to the valve stem or adjuster and mounts to the rocker shaft or pedestal; correct condition and alignment are important for valve lift and timing accuracy, and wear or damage can reduce combustion efficiency and engine smoothness. Replacement must match the original part specification to maintain valvetrain geometry and clearances.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Discovery 3 (2005-2009) - Cologne V6 4.0 EFI SOHC - From VIN TO9A999999
Frequently Asked Questions
4121218 is a valve rocker arm that forms part of the valvetrain on the Cologne 4.0 Petrol V6 EFI SOHC engine. It converts camshaft rotation into linear valve movement by transmitting force from the cam follower to the valve stem or adjuster; wear or damage can affect valve lift, timing accuracy and engine smoothness.
| Model | Variant |
|---|---|
| Land Rover Discovery 3 (2005-2009) | Cologne V6 4.0 EFI SOHC - From VIN TO9A999999 |
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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