Jaguar F-Pace P400 Specialists

Jaguar F-Pace 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

Jaguar F-Pace P400 Engine

from£6,500 to £10,00...

Usedfrom £2,500
Reconditionedfrom £4,500
Common codesAJ300P

Jaguar f-paceUsed Engine — AJ300P

Jaguar f-pace P400 Reconditioned Engine — AJ300P

Jaguar f-paceReconditioned Engine — AJ300P

Jaguar f-pace P400 Rebuilt Engine — AJ300P

Jaguar f-paceRebuilt Engine — AJ300P

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Jaguar 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.

2021
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).

Every 3.0L MHEV petrol engine fitted to the Jaguar F-Pace P400 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Jaguar F-Pace P400 Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

AJ300P — 3.0L MHEV Petrol (2021-present)

Power Output: 400hp
Years Fitted: 2021-present

Can’t find your exact engine code?-> Get quotes for AJ300P Jaguar F-Pace P400 engine replacement

-> Get quotes for AJ300P Jaguar F-Pace P400 engine replacement

Common Problems

Jaguar F-Pace P400 Engine Problems Repair Cost vs Replacement

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.

Common failure points and repair options

Cooling System Leaks & Water Pump Failure

Affected: 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.

Repair options

Repair tier	Dealer price	Specialist price
Minor - Water Pump & Coolant Pipe Replacement	£800 - £1,200	£400 - £800
Full Replacement - rebuilt/reconditioned engine	£7,500 - £11,000	£6,500 - £10,000

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.

-> Compare rebuilt AJ300P Jaguar F-Pace P400 engine prices

Turbocharger Wear & Boost Issues

Affected: Jaguar F-Pace P400 (AJ300P, 2021-present)
Typical failure mileage: 80,000 - 120,000 miles

Root cause

The twin-scroll turbocharger can suffer from wastegate actuator wear or bearing degradation, leading to reduced boost pressure, hesitation, and check engine lights.

Repair options

Repair tier	Dealer price	Specialist price
Intermediate - Turbocharger Replacement	£2,500 - £3,500	£1,500 - £2,500
Full Replacement - rebuilt/reconditioned engine	£8,000 - £12,000	£6,500 - £10,000

Our recommendation

If boost issues are caught early, a standalone turbocharger replacement is the most economical fix. If turbo failure has sent debris into the intercooler and engine, a full rebuilt Jaguar F-Pace P400 engine is required to prevent rapid secondary failure.

-> Compare rebuilt AJ300P Jaguar F-Pace P400 engine prices

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 Jaguar F-Pace P400 Engine Replacement Prices Now ->

FAQ

Jaguar F-Pace P400 Engine ReplacementFrequently Asked Questions

Everything Jaguar F-Pace P400 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

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.

-> Compare Jaguar F-Pace P400 engine replacement prices

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.

-> Get quotes for Jaguar F-Pace P400 cooling system and engine replacement

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.

-> Compare rebuilt Jaguar F-Pace P400 engine prices to assess your repair vs replace decision

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.

-> Find Jaguar F-Pace P400 specialists offering ECU programming with engine replacement services

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.

-> Compare reconditioned versus used Jaguar F-Pace P400 engine prices and warranty terms

Why Choose Us

Compare Jaguar F-Pace P400 Engine Prices Today

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.

50+50+ Jaguar F-Pace P400 engines supplied through our network

12-Month12-Month Warranty on every rebuilt Jaguar F-Pace P400 engine

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Compare quotes from trusted UK Jaguar F-Pace P400 engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.