ERR7177 - Piston Assembly

The Piston Assembly is a complete engine piston for the Td5 2.5L 5-cylinder turbo diesel fitted to the Land Rover Defender and Discovery 2. It runs in the cylinder bore and transmits combustion pressure to the connecting rod through the gudgeon pin.

ERR7177 fits the Land Rover Defender and Discovery 2 (1999-2004) with the 2.5L Td5 5-cylinder turbo diesel engine. Confirm your engine is the Td5 before ordering, as pistons differ between the Td5 and earlier diesel engines.

A full Td5 rebuild typically needs five pistons, as the Td5 is a 5-cylinder engine, and this piston is sold individually. For a single damaged bore you may only need one, but matching all pistons is usually preferred during a rebuild.

A Td5 piston typically needs replacing when the bore or piston is damaged, the rings are worn, or the engine is being rebuilt. Signs include heavy blow-by, oil consumption or piston slap, though diagnosis should follow inspection of the bore and rings.