Land Rover Defender 110 P425 Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Land Rover Defender 110 P425 engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the best value for your high-performance 4x4.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
👑 Premium Inline-6 Specialists
From £6,500 to £10,000
Used from £2,500 · Reconditioned from £4,500 · Common codes: 306PS, AJ20P6
From £2,500
Tested, bare/short engine
From £4,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Land Rover Defender 110 P425 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Land Rover Defender 110 P425 Replacement Engineto Finding the Best Land Rover Defender 110 P425 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryLand Rover Defender 110 P425 - Engine History & Specs at a Glance
When the P425 was introduced to the L663 Defender 110 lineup, it represented the sweet spot of modern JLR performance, pairing a refined 3.0-litre inline-six mild-hybrid petrol engine with the iconic 110 chassis for exceptional on-road dynamics and robust off-road capability.
Variant HistoryLand Rover Defender 110 P425 - Engine History & Specs at a Glance
When the P425 was introduced to the L663 Defender 110 lineup, it represented the sweet spot of modern JLR performance, pairing a refined 3.0-litre inline-six mild-hybrid petrol engine with the iconic 110 chassis for exceptional on-road dynamics and robust off-road capability.
Land Rover Defender 110 P425
Fuel TypePetrol (MHEV)
Engine Size Range3.0L (2996cc)
Power Output Range425hpEngine History Timeline
306PS (2996cc) 425hp, launched alongside the new L663 Defender 110, featuring an integrated starter-generator (ISG) 48V mild-hybrid system for seamless stop-start and torque fill.
Present - Continued production with minor calibration updates and the introduction of new special editions (e.g. 75th Edition), maintaining the same robust 3.0L Ingenium petrol architecture.
Key Specs Snapshot
Fuel TypePetrol (MHEV)Engine Size Range3.0L (2996cc)Power Output Range425hpYears Produced2020-presentEvery engine fitted to the Land Rover Defender 110 P425 is covered below, with UK rebuilt pricing and known failure points.
Land Rover Defender 110 P425 Engine Codes - Specifications & Replacement CostLand Rover Defender 110 P425 Engine Codes - Specifications & Replacement Cost
3.0L Petrol MHEV (2020-present)
Power Output425hpYears Fitted2020-present
Compatible Trim Levels
- Defender 110 P425
- Defender 110 P425 X-Dynamic
- Defender 110 P425 HSE
- Defender 110 P425 First Edition
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,500
Reconditioned
Addressed known issues, tested
£4,500-£7,500
Rebuilt
Full teardown, upgraded internals
£6,500-£10,000
Common Failure
Generally robust, though early Ingenium petrol variants can experience cooling system component wear (e.g., water pump or coolant crossover leaks) and occasional timing chain tensioner stretch.
The Land Rover Defender 110 P425 features a highly refined 3.0-litre inline-six mild-hybrid engine. While significantly more reliable than older JLR V8 architectures, high-performance forced-induction units require meticulous maintenance. Rebuilt engines through EnginesMarket include upgraded components addressing original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Land Rover Defender 110 P425 306PS Requires Attention
Affected Vehicles
Land Rover Defender 110 P425 (306PS, 2020-present)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
Plastic coolant fittings and water pump seals can degrade under high under-bonnet temperatures, leading to slow coolant loss and potential overheating if ignored.
Why It Happens
Plastic coolant fittings and water pump seals can degrade under high under-bonnet temperatures, leading to slow coolant loss and potential overheating if ignored.
Dealer (parts + labour)
£1,200-£2,000
Specialist (parts + labour)
£800-£1,500
What it involves
Replace plastic coolant pipes with revised aluminium parts and update the water pump assembly.
Suitability
Highly recommended preventative maintenance to avoid catastrophic overheating.
1 - 2 daysDealer (parts + labour)
£8,000-£12,000
Specialist (parts + labour)
£6,500-£10,000
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty.
Suitability
Necessary if neglect has led to severe overheating, warped heads, or deep mechanical knocking.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor/Preventative Minor | £1,200-£2,000 | £800-£1,500 | Replace plastic coolant pipes with revised aluminium parts and update the water pump assembly. | Highly recommended preventative maintenance to avoid catastrophic overheating. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£12,000 | £6,500-£10,000 | Supply & fit, upgraded components addressing the original failure point, 12-month warranty. | Necessary if neglect has led to severe overheating, warped heads, or deep mechanical knocking. | 1 - 2 days |
Our Recommendation
Our Recommendation
If the engine is fundamentally sound, addressing cooling components or the timing chain as preventative maintenance is highly cost-effective and preserves the original unit. However, if the vehicle has suffered severe overheating or exhibits deep mechanical knocking, a full reconditioned replacement is the only reliable path to protect your investment.
Don't Let Engine Failure Write Off Your Land Rover Defender 110 P425
Protect your high-performance investment with a rebuilt engine that features upgraded components and a comprehensive 12-month unlimited-mileage warranty. By comparing quotes from our vetted UK specialist network, you avoid main dealer premiums while securing nationwide supply and fit options tailored to your exact Land Rover Defender 110 P425.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Land Rover Defender 110 P425. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Land Rover Defender 110 P425 Engine ReplacementFrequently Asked Questions
Question 1How much does a Land Rover Defender 110 P425 engine replacement cost-
A reconditioned or rebuilt Land Rover Defender 110 P425 engine typically costs between £4,500 and £10,000 for the supply-only unit, depending on the level of rebuild and specialist documentation provided.
- Rebuilt units include upgraded cooling components and timing chain checks.
- Supply and fit packages are available through our premium specialist network.
Question 2What are the signs of cooling or timing chain failure in a Land Rover Defender 110 P425-
Early detection is critical to preventing catastrophic damage to your Land Rover Defender 110 P425 engine.
- Look for unexplained coolant loss, sudden overheating warnings, or a distinct rattling noise from the front of the engine at cold start.
- Sweet-smelling exhaust smoke or oil contamination are also strong indicators of internal failure.
Question 3Is it worth replacing the engine in a modern Land Rover Defender 110 P425-
Yes, given the strong retained values of the L663 Defender, replacing the engine is a highly sound financial decision.
- A typical 2020+ model is valued between £55,000 and £85,000+, making a £6,500-£10,000 rebuild a small percentage of the vehicle's worth.
- A rebuilt engine with a 12-month warranty adds reliability and protects your premium asset.
Question 4How long does a Land Rover Defender 110 P425 engine supply and fit take-
A straightforward supply and fit replacement for a Land Rover Defender 110 P425 typically takes 3 to 5 days at a premium specialist workshop.
- This allows time for the engine to be delivered, mounted, and thoroughly calibrated and tested.
- Complex cases requiring additional cooling system upgrades may take slightly longer.
Question 5Can I upgrade my Land Rover Defender 110 to a P425 engine-
While the L663 chassis was designed with multiple powertrain options, a retrofit is not straightforward.
- The P425 3.0L MHEV requires extensive ECU mapping, bespoke wiring harnesses, and upgraded cooling systems to function correctly and pass MOT.
- We strongly recommend sticking to a like-for-like replacement to ensure guaranteed compatibility, reliability, and warranty coverage.
Why Choose UsCompare Land Rover Defender 110 P425Engine PricesToday
100+ Premium inline-6 engines supplied through our network
12-Month Warranty on every rebuilt Land Rover Defender 110 P425 engine
Nationwide UK delivery
supply & fit available
Comparing quotes is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is precisely matched to your Land Rover Defender 110 P425 and its specific 306PS engine code, connecting you directly with vetted UK premium Land Rover specialists.
Enter your registration
and get matched with verified Land Rover Defender 110 P425 specialists.