- Cylinder block and crankshaft - 12 cylinder models
- Cylinder head, camshaft and valve train - 5.3 V12 models
- Cylinder head, camshaft and valve train - 6.0 V12 models
- Cylinder block and crankshaft - 6 cylinder models
- Cylinder head, camshaft and valve train - 3.6 litre 6 cylinder models
- Cylinder head, camshaft and valve train - 4.0 litre 6 cylinder models
- Tappet adjusting pads - 3.6 and 4.0 litre AJ6 engine 3.6 with AJ6 engine from VIN...108026 to 179736 (1982-91), 4.0 with AJ6 engine from engine no. 173794 to 196089 (1991-94)
- Tappet adjusting pads - 4.0 litre AJ16 engine XJS 4.0 with AJ16 engine from engine no. B100136 (1994-96)
- Tappet adjusting pads - 5.3 V12 engine 5.3 V12 to VIN...188104 (1975-93)
- Tappet adjusting pads - 6.0 V12 models 6.0 V12 from VIN...188105 to 226645 (1993-96)
- Engine mountings - 12 cylinder models
- Oil cooler
- Engine breather system - 6 cylinder models
- Engine breather system - 12 cylinder models
- Emission control system
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