4603139 | LH Exhaust Manifold Gasket - 4.4 & 4.2S AJ-V8 | Discovery 3, Range Rover
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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: 4603139 - LH Exhaust Manifold Gasket
4603139 is a left-hand (LH) exhaust manifold gasket. Fitted to the left-hand exhaust manifold flange on 4.2 Supercharged and 4.4 AJ-V8 (AJ) engines, this gasket provides a gas-tight seal between the cylinder head and the exhaust manifold to prevent exhaust leaks, reduce manifold noise and help stop exhaust fumes entering the engine bay or cabin. The gasket should be renewed whenever the manifold is removed or if an exhaust leak is suspected.
Compatibility
- Discovery 3 (2005-2009) - 4.4 AJ Petrol V8 EFI (220KW)
- Range Rover (2002-2009) - 4.4 AJ Petrol V8 EFI (220KW)
- Range Rover (2002-2009) - 4.2 AJ Petrol V8 Supercharged
- Range Rover Sport (2005-2009) - 4.4 AJ Petrol V8 EFI (220KW)
- Range Rover Sport (2005-2009) - 4.2 AJ Petrol V8 Supercharged
Frequently Asked Questions
4603139 seals the left-hand exhaust manifold flange to the cylinder head on 4.2 Supercharged and 4.4 AJ-V8 engines, creating a gas-tight joint to prevent exhaust leaks. This helps reduce manifold noise and prevents exhaust fumes from entering the engine bay or cabin. The gasket must be replaced if the manifold is removed or if a leak is evident.
| Model | Variant |
|---|---|
| Land Rover Discovery 3 (2005-2009) | 4.4 AJ Petrol V8 EFI (220KW) |
| Land Rover Range Rover (2002-2009) | 4.4 AJ Petrol V8 EFI (220KW) |
| Land Rover Range Rover (2002-2009) | 4.2 AJ Petrol V8 Supercharged |
| Land Rover Range Rover Sport (2005-2009) | 4.4 AJ Petrol V8 EFI (220KW) |
| Land Rover Range Rover Sport (2005-2009) | 4.2 AJ Petrol V8 Supercharged |
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 gasket whenever the exhaust manifold is removed, or immediately if there are signs of an exhaust leak such as soot at the flange, a ticking noise, or exhaust fumes in the cabin. When in doubt, consult the vehicle handbook or a qualified technician.
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