Range Rover 306DT/508PS/368DT Specialist Engine Replacement - Compare Quotes

Key points

• Full rebuilt engine supply & fit: £4,500-£11,000 depending on engine code
• Used engine supply only: £1,500-£4,500 - but warranty limited or none
• Reconditioned units average £3,200-£7,500 with 12-month warranty
• Fitting alone adds £600-£1,200 to any engine price
• SDV6 timing chain replacement is £900-£1,600 - much cheaper than full failure

Key points

• BMW 4.4L M62 V8 - widely regarded as one of the strongest Range Rover engines ever fitted
• Naturally aspirated 5.0L AJ V8 - more reliable than supercharged version, runs cooler
• 4.4L SDV8 diesel - lower failure rate than TDV6, excellent torque delivery
• 3.0L Ingenium inline-six MHEV - excellent early reliability, avoid four-cylinder Ingenium

Key points

• TDV6 crankshaft failure hits 2-3% of units - independent of maintenance
• Catastrophic failure often occurs between 70,000-110,000 miles with no warning
• SDV6 has lower 1% failure rate than standard TDV6
• Once crank seizes, full replacement is only option - regrind rarely possible
• Early warning sign is bottom-end knock - stop driving immediately

Key points

• SDV6 (3.0L diesel): 68% reach 150,000 miles with proper maintenance
• TDV6 (3.0L diesel): Only 41% reach 150,000 miles - avoid high-mileage examples
• Timing chain service at 100k (TDV6) or 112k (SDV6) is non-negotiable
• EGR cooler fails on 68% of units between 90,000-130,000 miles
• Crankshaft failure independent of maintenance - purely design flaw

Key points

• Brief metallic rattle or chatter on cold start - first warning sign
• Check engine light with P0017-P0019 codes - cam/crank correlation mismatch
• Rough idle, hesitation, loss of power as timing drifts out of specification
• Deferring chain service risks piston-to-valve collision - catastrophic damage
• Preventative replacement at 100-112k miles costs £900-£1,600 vs £5k+ for new engine

Key points

• Plastic coolant crossover pipes fail every 50,000-70,000 miles - sudden coolant loss risk
• Replace cooling system proactively at 60k miles - specialist cost £900-£1,600
• Frequent oil changes (5,000-7,500 miles) prevent timing chain tensioner failure
• Aftermarket metal coolant lines available as permanent fix
• Supercharger coupler rattle at idle is common - snout rebuild costs £650-£1,100

Key points

• Light rebuild (gaskets, EGR, ancillaries): £2,500-£3,500 - often worth it
• Full rebuild after major failure: £4,000-£6,000 - approaches replacement cost
• Replacement with warranted rebuilt unit: £4,500-£7,800 - new engine, same price
• Replaced engines include 12-month warranty - rebuilds often don't
• For TDV6 with bottom end damage: replacement is only sensible option

Key points

• 3.0L SDV6 diesel: 34-38 mpg official, 35 mpg real-world, 40+ mpg on motorway runs
• 5.0L supercharged V8: 23.5-29 mpg official - expect low 20s in real use
• 4.4L SDV8 diesel: around 32-35 mpg depending on driving
• P400e PHEV: 40-50 miles electric range, then approximately 31 mpg

Key points

• V5C registration document (logbook) - 'Engine number' field shows the code
• Driver's door chassis plate - engine code on VIN sticker
• Service history documents - engine type recorded at each service
• Under-bonnet compliance sticker - near front crossmember on L405
• Use registration lookup above - instant engine code identification

Key points

• L405 (2012-2021) worth £12k-£25k - replacement engines are good value
• L322 (2002-2012) worth £4k-£10k - replacement only viable for clean examples
• Replacement engine comes with 12-month unlimited mileage warranty
• A used replacement car has unknown service history - same engine risks
• If body, gearbox, suspension are sound - replacement makes financial sense