Land Rover Defender 110 D300e PHEV Engine ReplacementCompare Prices & Get Quotes

A replacement AJ20P4 (PT204) engine for the Defender 110 P400e typically costs between £2,000 and £7,500 depending on condition type: used engines from £2,000-£4,000, reconditioned from £3,500-£5,500, and rebuilt/remanufactured from £4,500-£7,500. Supply and fit adds approximately £1,000-£2,000 in labour. Dealer pricing for a full replacement can exceed £15,000-£30,000.

• Used: lowest upfront cost, variable mileage and condition
• Reconditioned: used engine rebuilt with new wear parts
• Rebuilt: full factory-spec rebuild with 12-month warranty

The 2.0-litre Ingenium PHEV is subject to a known coolant pump drive belt issue - a safety recall (N785) was issued for 2021-2023 models. Common symptoms include overheating warnings, loss of coolant, steam from the engine bay, and in severe cases, engine shutdown and fire risk.

• Overheating warning light - first warning sign
• Loss of coolant or visible leaks
• Steam from engine compartment
• If belt fails completely, rapid overheating and potential engine seizure

This depends on your vehicle's value and the extent of the damage. A typical 2021-2023 Defender 110 P400e is worth £55,000-£90,000, with newer examples exceeding £95,000. Given the high residual value of these vehicles, a rebuilt engine with warranty is almost always a sound investment. If the car is worth under £8,000 (extremely unlikely for this model), a used engine or repair may be more economical.

• Vehicle value over £55,000: rebuilt engine with warranty is strongly justified
• Vehicle value £15,000-£55,000: evaluate both options carefully
• Vehicle value under £8,000: repair or used engine recommended

A full engine replacement on a Land Rover Defender 110 P400e typically takes 3-5 working days for supply and fit through a specialist. This includes removal of the old unit, hybrid system disconnection/reconnection, preparation of the replacement engine, installation, and testing. PHEV powertrains require additional time for high-voltage system handling.

• Supply-only: 2-5 days for delivery
• Supply & fit: typically 3-5 working days
• PHEV systems require specialist handling - always confirm lead time

These are entirely different powertrains. The P400e (often called D300e PHEV in some markets) is a 2.0-litre four-cylinder petrol plug-in hybrid producing 404PS total system output. The D300 is a 3.0-litre six-cylinder diesel mild hybrid (MHEV) producing 300PS and 650Nm. They share the 110 body style but have completely different engines, fuel types and hybrid architectures.

• P400e PHEV: 2.0L petrol + electric motor, 404PS, 27-mile electric range
• D300 MHEV: 3.0L six-cylinder diesel, 300PS, no electric-only range
• Engine replacement costs and specialists differ significantly

Every rebuilt or reconditioned engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Used engines may come with a shorter warranty (typically 3-6 months) depending on the supplier. Always confirm exact warranty terms - including what is and isn't covered - with your chosen specialist before purchase.

• Rebuilt engines: minimum 12-month unlimited mileage
• Reconditioned: typically 12-month warranty
• Used: 3-6 months warranty typical