How much does a Land Rover Defender P400e engine replacement cost in the UK?

A reconditioned Defender P400e (PT204) engine typically costs £3,000–£5,800 supply only. Fitting adds £1,200–£2,000 depending on location and workshop rates. Note that hybrid battery replacement is a separate cost — typically £6,000–£10,000+ from a main dealer.

What are the common problems with the Defender P400e?

The main known issues are: (1) Coolant leaks from the charge air cooler, turbo hoses, or water pump — the most frequently reported problem, (2) Electric coolant pump failure in the hybrid system, and (3) Rough idle or hesitation from the 2.0-litre petrol engine, particularly when cold or in hybrid mode.

Is it worth replacing a Defender P400e engine, or should I scrap the car?

Depends on vehicle value and condition. Against a well-kept £45,000–£65,000 Defender P400e, a £4,000–£5,800 recon is around 10% of the car's value — worth it, particularly given Defender values have remained strong. However, if the hybrid battery also needs replacement (£6,000–£10,000+), evaluate total repair costs against the vehicle's value.

How do I find my Defender P400e engine code?

The P400e uses the PT204 (also known as AJ200P) — a 2.0-litre four-cylinder Ingenium petrol engine. The engine number is stamped on the cylinder block. Tell us your registration and we'll confirm it for free.

Can I repair the P400e coolant leak, or does it need engine replacement?

Yes — coolant leaks on the P400e are almost always repairable without engine replacement. Common fixes include charge air cooler replacement (£300–£800), turbo coolant hose repair (£200–£500), or water pump replacement (£400–£800). The key is catching the leak early — ignored coolant loss can lead to overheating and catastrophic engine damage.

Land Rover Defender P400e2020–present1 Powertrain Generation

Land Rover Defender P400e Engine Replacement — Compare Prices & Get Quotes

Name: Land Rover Defender P400e UK Engine Enquiry Data 2025
Creator: LandRoverEngine.uk

Get quotes today from trusted UK Land Rover Defender P400e specialists. The 2.0-litre Ingenium petrol plug-in hybrid pairs a four-cylinder engine with a 105kW electric motor — compare reconditioned, rebuilt and used units with supply & fit available nationwide.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

12 Specialists

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

12 Specialists

Defender P400e Engines — from £1,500 to £5,800Engine code: <a href='https://landroverengine.uk/engine/ford-si4-pt204'>PT204</a> (AJ200P)

Defender P400e Engines — from £1,500 to £5,800· Engine code: <a href='https://landroverengine.uk/engine/ford-si4-pt204'>PT204</a> (AJ200P)

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

Land Rover Defender P400e — Which Powertrain Does Your Car Actually Have?

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

2.0-litre four-cylinder Ingenium petrol with 19.2kWh battery — PHEV only, 110 body style

GenerationYearsEngine CodeReliabilityRecon CostEra Note

L663

2020–presentPT204 (AJ200P) + 105kW e-motor★★★☆☆ [NEWLY ASSIGNED — see Data Note]£1,500–£5,800 [PLACEHOLDER]2.0-litre four-cylinder Ingenium petrol with 19.2kWh battery — PHEV only, 110 body style

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Land Rover Defender P400e Engine Replacement Costs

Supply Only£3,000–£5,000

Fitted (Indie)£4,200–£6,500

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,500–£2,800£2,500–£4,0001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£3,000–£5,000£4,200–£6,50012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£4,200–£5,800£5,500–£7,50012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£8,000–£12,000+£9,500–£14,000+24–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting a Defender P400e engine typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Hybrid system calibration adds additional labour.

→ Compare Defender P400e engine prices from UK specialists

Common Problems

1. Coolant Leak (Charge Air Cooler / Turbo Hoses)

Symptoms: Coolant level dropping with no visible external leak, coolant smell from engine bay, low coolant warning light

Typical mileage: 20,000–60,000 miles — can occur on low-mileage examples

Repair cost: £300–£800 (charge air cooler replacement or hose repair)

Replacement cost: N/A — repair only (does not progress to engine replacement if addressed)

🟠 Check - book inspection urgently if coolant level drops frequently

Our recommendation:

Coolant loss is the most frequently reported issue on the P400e's 2.0-litre Ingenium petrol engine. Common failure points include the charge air cooler (internal leak at high revs), turbocharger coolant feed O-ring, and water pump. The charge air cooler leak is particularly insidious — coolant burns off through the exhaust without visible external signs. If you're topping up coolant regularly, book a pressure test immediately. A £300–£800 repair is far cheaper than the overheating damage that follows if ignored.

Read the full coolant leak guide → /failures/ingenium-coolant-leak/ [NEW FAILURE PAGE NEEDED]

1. Coolant Leak (Charge Air Cooler / Turbo Hoses)

Symptoms: Coolant level dropping with no visible external leak, coolant smell from engine bay, low coolant warning light

Typical mileage: 20,000–60,000 miles — can occur on low-mileage examples

Repair cost: £300–£800 (charge air cooler replacement or hose repair)

Replacement cost: N/A — repair only (does not progress to engine replacement if addressed)

🟠 Check - book inspection urgently if coolant level drops frequently

Our recommendation:

Read the full coolant leak guide → /failures/ingenium-coolant-leak/ [NEW FAILURE PAGE NEEDED]

2. Electric Coolant Pump Failure (Hybrid System)

Symptoms: Engine temperature rising rapidly, check engine light activation, sudden overheating warning

Typical mileage: 40,000–80,000 miles — reported on 2021 models

Repair cost: £80–£250 (cable connection repair) / £400–£800 (pump replacement)

Replacement cost: N/A — repair only (does not progress to engine replacement if addressed)

🔴 Immediate - overheating can cause catastrophic engine damage

Our recommendation:

The P400e's hybrid cooling system relies on an electric coolant pump that can fail due to a faulty cable connection. This is a known issue shared with the Range Rover Sport Hybrid. If you see a temperature warning, stop driving immediately — continued driving with an overheating 2.0-litre Ingenium engine can cause head gasket failure or worse. The repair is often straightforward (cable replacement) once diagnosed correctly.

Read the full electric coolant pump guide → /failures/electric-coolant-pump/ [NEW FAILURE PAGE NEEDED]

3. Rough Idle / Hesitation (2.0-litre Petrol Engine)

Symptoms: Rough idle when stationary, hesitation or stuttering at low speed / light throttle, especially when the engine is cold

Typical mileage: Any mileage — reported on low-mileage examples

Repair cost: £100–£500 (diagnosis + software update / sensor replacement)

Replacement cost: N/A — repair only (does not progress to engine replacement if addressed)

🟡 Monitor - book inspection soon

Our recommendation:

Multiple P400e owners have reported a rough idle and hesitation when the 2.0-litre engine is running, particularly when the hybrid battery is depleted or the engine is cold. Some describe it as "almost like the timing is out". This may be a characteristic of the four-cylinder Ingenium rather than a fault — but if it worsens or is accompanied by warning lights, get it checked. The P400e's 2.0-litre four-cylinder is notably less refined than the six-cylinder P400 petrol.

Read the full rough idle guide → /failures/rough-idle-ingenium/ [NEW FAILURE PAGE NEEDED]

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Get Matched With a Vetted Land Rover Specialist

12 vetted Land Rover specialists, every Defender P400e powertrain covered, with a 12-month warranty as standard.

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Defender P400e — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Defender P400e — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseCharge air cooler coolant leak✅ Yes£300–£800Straightforward component replacementTurbo coolant hose / O-ring leak✅ Yes£200–£500Common repair on Ingenium petrol enginesElectric coolant pump cable failure✅ Yes£80–£250Simple electrical fix if caught earlyElectric coolant pump failure✅ Yes£400–£800Viable on any well-maintained exampleHybrid battery failure⚠️ Sometimes£6,000–£10,000+Often warranty-covered; assess cost vs vehicle valueTiming chain failure (catastrophic)❌ Usually NoEngine replacementPiston-valve contact means little is left to repair

Buying This Defender P400e? Check These First

Buy If

Full service history with JLR-approved oil and coolant specs
Evidence of regular use (hybrid batteries degrade with extended inactivity)
Coolant system pressure test passed with no leaks
Remaining manufacturer warranty (5-year / unlimited miles from new)

Avoid If

Coolant warning light or frequent top-ups without documented fix
Check engine light with no diagnosis — hybrid systems are complex
No history of the 2.0-litre Ingenium's known coolant issues being addressed
Low mileage with long periods of inactivity (hybrid battery health risk)

Closing Verdict

The Defender P400e is a sophisticated plug-in hybrid that pairs a 2.0-litre Ingenium petrol engine with a 105kW electric motor. It's the quickest Defender in the range (0-60 in 5.4 seconds) and offers up to 27–27 miles of electric-only range. However, the 2.0-litre Ingenium petrol engine has well-documented cooling system weaknesses — charge air cooler leaks, turbo coolant hose failures, and water pump issues. Buy with documented coolant system history, ideally with remaining manufacturer warranty, and you'll have a genuinely capable and rapid hybrid off-roader.

Don't guess.Get the right engine at the right price.

→ Compare Defender P400e engine prices before you buy

Don't Guess. Compare.

Get real quotes from vetted UK specialists and make the right call for your 320d.

→ Compare Defender P400e engine prices before you buy

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Buying Checklist

Before you buy a used Land Rover Defender P400e (or before you commit to an engine replacement), check these:

Cold Start — Listen for rough idle or hesitation when the engine first runs

Coolant Level — Check for frequent top-ups; smell for coolant in the engine bay

Service History — Including the 2.0-litre Ingenium petrol (PT204) and confirmed coolant system inspections

Hybrid Battery Health — Check electric-only range matches claimed figures (27 miles)

Coolant System Pressure Test — Ask for evidence of a recent pressure test

Charging System — Test both AC wallbox and rapid charging functionality

Warning Lights — Any check engine or hybrid system warnings? Have codes been read?

Warranty Status — The 5-year / unlimited miles warranty is valuable — check remaining cover

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Engine Codes

This table's rows match Section 1B's Era Map exactly.

PT204 (AJ200P) + 105kW e-motor

Years2020–present

Power398–404 bhp / 640 Nm

2025 Enquiries— (pattern data)

Avg. Recon Cost£3,000–£5,800 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

PT204 (AJ200P) + 105kW e-motor2020–present398–404 bhp / 640 Nm— (pattern data)£3,000–£5,800 [PLACEHOLDER]

Technical Specs

PT204 / AJ200P

Displacement1,997 cc (2.0L)

Cylinders4-cylinder inline

Fuel SystemDirect injection

TurbochargerSingle twin-scroll turbo

Electric Motor105 kW (141 bhp)

Battery19.2 kWh lithium-ion

Combined Power398–404 bhp

Combined Torque640 Nm

0-60 mph5.4–5.6 seconds

Electric-only range27 miles (43 km)

→ Compare Defender P400e engine prices for your Land Rover

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Market Intelligence

Most Common Failure

Coolant system leaks (charge air cooler, turbo hoses, water pump) — reported across low and high-mileage P400e examples

Average Enquiry Mileage

25,000

–50,000 miles

[PATTERN DATA]

Average Replacement Cost

£4,000

reconditioned, supply only

[PLACEHOLDER]

Most Requested Engine Code

PT204 (AJ200P)

[PATTERN DATA]

Peak Enquiry Season

Spring / Summer — PHEV owners prepare for overlanding season

[PATTERN DATA]

Regional Demand

South East20%

London18%

South West14%

PATTERN DATA

Regional Demand Breakdown

20%South East

18%London

FAQ

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty — always confirm terms with your chosen supplier.

Why UK Land Rover Defender P400e Owners Trust LandRoverEngine.uk

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Find the best Land Rover Defender P400e engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence — from £3,000 supply-only.

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