Jaguar FPace P400 Engine Replacement - Compare Prices & Get Quotes
Get quotes today from trusted UK Jaguar F-Pace P400 engine specialists. Compare prices on reconditioned, rebuilt and used 3.0L MHEV petrol engines, with supply & fit available nationwide.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £6,500 to £10,000 [EM-QUOTE]
Used from £2,500 · Reconditioned from £4,500 · Common codes: AJ300P
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 Jaguar F-Pace P400 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Jaguar F-Pace P400 Replacement Engineto Finding the Best Jaguar F-Pace P400 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryJaguar F-Pace P400 - Engine History & Specs at a Glance
Launched in 2021 as the flagship petrol performance variant of the facelifted F-Pace, the P400 delivers 400PS from a refined 3.0L inline-6 mild-hybrid Ingenium engine, balancing effortless acceleration with modern efficiency.
Variant HistoryJaguar F-Pace P400 - Engine History & Specs at a Glance
Launched in 2021 as the flagship petrol performance variant of the facelifted F-Pace, the P400 delivers 400PS from a refined 3.0L inline-6 mild-hybrid Ingenium engine, balancing effortless acceleration with modern efficiency.
Jaguar F-Pace P400
Fuel TypePetrol MHEV
Engine Size Range3.0L
Power Output Range400hpEngine History Timeline
AJ300P 3.0L MHEV Petrol, 400hp (Introduction of the 3.0L inline-6 mild-hybrid Ingenium engine, replacing the older supercharged V6, featuring a 48V belt-integrated starter generator for smoother stop-start and torque fill).
Key Specs Snapshot
Fuel TypePetrol MHEVEngine Size Range3.0LPower Output Range400hpYears Produced2021-presentEvery 3.0L MHEV petrol engine fitted to the Jaguar F-Pace P400 is covered below, with UK rebuilt pricing and known failure points.
Jaguar F-Pace P400 Engine Codes - Specifications & Replacement CostJaguar F-Pace P400 Engine Codes - Specifications & Replacement Cost
3.0L MHEV Petrol (2021-present)
Power Output400hpYears Fitted2021-present
Compatible Trim Levels
- F-Pace P400 R-Dynamic SE
- F-Pace P400 R-Dynamic HSE
- F-Pace P400 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
Cooling system leaks (water pump and plastic coolant pipes) and occasional turbocharger issues, typically observed between 60,000-120,000 miles.
The Jaguar F-Pace P400 (3.0L inline-6 MHEV petrol) is generally considered robust compared to earlier supercharged V6 units, but it is not immune to specific wear items. The AJ300P code dominates replacement demand for this variant primarily due to cooling system vulnerabilities and turbocharger wear. Every rebuilt Jaguar F-Pace P400 engine supplied through EnginesMarket includes upgraded internal components designed to address the original failure points, backed by a minimum 12-month unlimited mileage warranty.
Why the Jaguar F-Pace P400 Loses Coolant
Affected Vehicles
Jaguar F-Pace P400 (AJ300P, 2021-present)
Typical Failure Mileage
60,000 - 100,000 miles
Root Cause
Plastic coolant pipes and water pump housings can degrade under repeated thermal cycling, leading to coolant loss and potential overheating if not addressed promptly.
Why It Happens
Plastic coolant pipes and water pump housings can degrade under repeated thermal cycling, leading to coolant loss and potential overheating if not addressed promptly.
Dealer (parts + labour)
£800 - £1,200
Specialist (parts + labour)
£400 - £800
What it involves
Replacing the water pump assembly and vulnerable plastic coolant pipes, followed by a system pressure test and coolant flush.
Suitability
Highly effective if caught early before overheating occurs.
1 - 2 daysDealer (parts + labour)
£7,500 - £11,000
Specialist (parts + labour)
£6,500 - £10,000
What it involves
Supply & fit of a fully reconditioned engine with upgraded cooling components, bench tested, 12-month warranty.
Suitability
Necessary if the engine has overheated and warped the cylinder head or damaged internal bearings.
1 - 2 days
All 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 - Water Pump & Coolant Pipe Replacement Minor | £800 - £1,200 | £400 - £800 | Replacing the water pump assembly and vulnerable plastic coolant pipes, followed by a system pressure test and coolant flush. | Highly effective if caught early before overheating occurs. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £7,500 - £11,000 | £6,500 - £10,000 | Supply & fit of a fully reconditioned engine with upgraded cooling components, bench tested, 12-month warranty. | Necessary if the engine has overheated and warped the cylinder head or damaged internal bearings. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Jaguar F-Pace P400 (2021-present) is currently valued between £35,000 and £55,000 [THIRD-PARTY]. - Vehicle worth £15,000+: replacement cost is typically small relative to vehicle value. For a well-maintained F-Pace P400 in this value band, a £6,500-£10,000 rebuilt engine is a financially sound investment that protects the vehicle's premium residual value and restores factory reliability.
Our Recommendation
Our Recommendation
If your Jaguar F-Pace P400 is losing coolant but shows no signs of overheating, replacing the water pump and plastic coolant pipes is highly cost-effective. However, if the engine has overheated and warped the cylinder head, a rebuilt unit is the only reliable long-term solution.
Don't Let Engine Failure Write Off Your Jaguar F-Pace P400
Whether you are dealing with cooling system leaks or turbocharger wear on your Jaguar F-Pace P400, the financial decision between repeated dealership repairs and a complete engine replacement is straightforward. EnginesMarket connects you with trusted UK specialists who supply fully rebuilt 3.0L MHEV petrol engines featuring upgraded components that permanently address the original design flaws. Every unit comes with a minimum 12-month unlimited mileage warranty, nationwide delivery, and optional supply & fit packages, allowing you to bypass main dealer markups.
Compare rebuilt AJ300P Jaguar F-Pace P400 engine prices
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 Jaguar F-Pace P400. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Jaguar F-Pace P400 Engine ReplacementFrequently Asked Questions
Question 1How much does a Jaguar F-Pace P400 engine replacement cost-
A rebuilt Jaguar F-Pace P400 engine typically costs between £6,500 and £10,000 for supply only, while a reconditioned unit ranges from £4,500 to £7,500.
- Used engines are cheaper (£2,500-£4,500) but carry unknown history.
- Labour for supply and fit adds approximately £780 to £1,040 depending on the specialist.
- Always confirm if JLR SDD diagnostic coding is included in the quoted price.
Question 2What are the signs of cooling system failure in a Jaguar F-Pace P400-
The earliest sign is a dropping coolant level with no visible external leaks, often accompanied by a sweet smell from the engine bay.
- Warning lights for low coolant or engine temperature on the dashboard.
- White smoke from the exhaust if coolant is entering the combustion chamber.
- Overheating warnings during sustained driving or under load.
Question 3Is it worth replacing the engine in a Jaguar F-Pace P400-
Yes, replacing the engine is often financially sensible if the chassis, interior, and transmission remain sound. A rebuilt unit preserves a premium performance asset that would cost significantly more to replace with a comparable used vehicle.
- Post-rebuild units include upgraded cooling components addressing known weaknesses.
- Verify no structural corrosion or accident damage before committing to replacement.
- Supply and fit packages simplify the process with warranty-backed installation.
Question 4Do I need to reprogram the ECU after replacing my Jaguar F-Pace P400 engine-
Yes, Jaguar F-Pace P400 engine replacement requires JLR SDD or Pathfinder diagnostic programming to pair the new ECU with the engine immobiliser and calibrate the 48V MHEV system.
- Incorrect coding triggers limp mode or prevents the vehicle from starting.
- Specialist workshops with Jaguar diagnostic equipment handle this process routinely.
- Programming is non-negotiable and typically included in professional supply & fit packages.
Question 5Should I buy a used or reconditioned Jaguar F-Pace P400 engine-
Reconditioned Jaguar F-Pace P400 engines offer superior value despite a higher upfront cost, including replaced wear items, upgraded cooling components, and a 12-month warranty.
- Used engines may appear cheaper but lack warranty protection and risk repeating the original failure.
- Rebuilt units undergo bench testing and compression verification before dispatch.
- Supply-only pricing allows you to choose your preferred installer for best value.
Why Choose UsCompare Jaguar F-Pace P400Engine PricesToday
50+ Jaguar F-Pace P400 engines supplied through our network
12-Month Warranty on every rebuilt Jaguar F-Pace P400 engine
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Comparing quotes is free, no-obligation, and specific to your exact Jaguar F-Pace P400 and AJ300P engine code. Whether you need a budget-friendly used unit or a fully rebuilt 3.0L MHEV petrol engine with upgraded cooling components and a 12-month warranty, our vetted UK specialists provide transparent pricing and professional supply & fit options to get you back on the road with confidence.
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