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

A reconditioned Range Rover P400e engine typically costs £6,500–£11,000 supply only. Fitting adds around £1,500–£2,500 depending on location and workshop rates. A brand-new OEM engine costs approximately £20,000–£22,000 installed. Hybrid battery replacement is a separate cost — typically £6,000–£10,000+ from a main dealer.

Is the Range Rover P400e engine reliable?

The P400e uses the AJ20P6 2.0-litre four-cylinder Ingenium petrol engine, paired with a 105kW electric motor. The engine has documented issues: charge air cooler coolant leaks (JLR is investigating these), misfire/hesitation, and thermostat performance problems. The hybrid system adds complexity, but the petrol engine itself is more reliable than the diesel Ingenium units.

What are the common problems with the Range Rover P400e?

The main known issues are: (1) Charge air cooler coolant leaks — coolant escapes at high revs and burns off through the exhaust, (2) Engine misfire / hesitation — rough idle and hesitation during acceleration, and (3) Thermostat performance issues — DTC P0128-00 flagged.

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

Depends on vehicle value and condition. Against a well-kept £40,000–£70,000 Range Rover P400e, a £6,500–£11,000 recon is around 10–30% of the car's value — worth it given Range Rover values remain 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 Range Rover P400e engine code?

The P400e uses the AJ20P6 (also known as PT204) — a 2.0-litre four-cylinder Ingenium petrol engine. The engine code 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. The most common fix is charge air cooler replacement (£800–£1,500). The key is catching the leak early — ignored coolant loss can lead to overheating and catastrophic engine damage. Regular coolant level checks are essential.

Land Rover Range Rover P400e2019–present1 Powertrain Generation

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

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

Get quotes today from trusted UK Range Rover P400e specialists. The 2.0-litre Ingenium petrol plug-in hybrid (AJ20P6) delivers 404 bhp — compare reconditioned, rebuilt and used engines with supply & fit available nationwide.

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Supply & Fit Available

12-Month Warranty

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12 Specialists

Range Rover P400e Engines — from £3,000 to £11,000Engine code: AJ20P6 (<a href='https://landroverengine.uk/engine/ford-si4-pt204'>PT204</a>)

Range Rover P400e Engines — from £3,000 to £11,000· Engine code: AJ20P6 (<a href='https://landroverengine.uk/engine/ford-si4-pt204'>PT204</a>)

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

Land Rover Range Rover 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 PHEV — 404 bhp, 640 Nm. Charge air cooler coolant leaks reported

GenerationYearsEngine CodeReliabilityRecon CostEra Note

L405

2019–2021AJ20P6 (PT204) + 105kW e-motor★★★☆☆ [NEWLY ASSIGNED — see Data Note]£6,500–£11,000 [EM-QUOTE]2.0-litre four-cylinder Ingenium petrol PHEV — 404 bhp, 640 Nm. Charge air cooler coolant leaks reported

L460

2022–presentAJ20P6 (PT204) + 105kW e-motor★★★☆☆ [NEWLY ASSIGNED — see Data Note]£6,500–£11,000 [EM-QUOTE]Revised L460 model — same powertrain, similar risk profile. Thermostat and CVVL system issues documented

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 Range Rover P400e Engine Replacement Costs

Supply Only£6,500–£11,000

Fitted (Indie)£8,500–£13,000

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£3,000–£5,000£4,500–£7,0001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£6,500–£11,000£8,500–£13,00012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£8,000–£12,000£10,000–£14,00012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£20,000–£22,000+£22,000–£24,000+24–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting a Range Rover P400e engine typically takes 15–25 hours at £65–£95/hr (independent). Hybrid system calibration and ECU programming add additional labour.

→ Compare Range Rover P400e engine prices from UK specialists

Common Problems

1. Charge Air Cooler Coolant Leak

Symptoms: Low coolant warning light, coolant level dropping with no visible external leak, no white smoke from exhaust despite significant coolant loss, coolant loss more pronounced at high revs

Typical mileage: Any mileage — reported across low and high-mileage examples

Repair cost: £800–£1,500 (charge air cooler replacement)

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:

JLR is investigating coolant level low complaints on Ingenium I4 2.0L petrol engines. The root cause is often an internal leak in the Charge Air Cooler (CAC). Coolant escapes at high revs, burns off through the exhaust without noticeable smoke, and the expansion tank level drops. The leak can be identified by pressurising the Charge Air Cooler component specifically. If you're topping up coolant regularly, book a pressure test immediately. A £800–£1,500 charge air cooler replacement is far cheaper than the overheating damage that follows if ignored.

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

1. Charge Air Cooler Coolant Leak

Symptoms: Low coolant warning light, coolant level dropping with no visible external leak, no white smoke from exhaust despite significant coolant loss, coolant loss more pronounced at high revs

Typical mileage: Any mileage — reported across low and high-mileage examples

Repair cost: £800–£1,500 (charge air cooler replacement)

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/charge-air-cooler-coolant-leak/ [NEW FAILURE PAGE NEEDED]

2. Engine Misfire / Hesitation & Rough Idle

Symptoms: Check Engine Light (MIL) illuminated, engine running rough, hesitation when accelerating, engine speed instability at low RPM, rough idle, vehicle may stall and restart on next ignition cycle

Typical mileage: Any mileage — reported on 2019 MY-onward vehicles

Repair cost: £200–£800 (diagnosis + software update / CVVL unit replacement)

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

🟡 Monitor - book inspection soon if symptoms appear

Our recommendation:

NHTSA documents confirm misfire or hesitation complaints on 19MY-onward Range Rover and Range Rover Sport equipped with the AJ20P6 engine. A revised PCM and TCM calibration is available to address engine speed instability at low RPM. In some cases, the Continuous Variable Valve Lift (CVVL) system may be at fault, requiring CVVL unit replacement. If you experience rough idle or hesitation, have the dealer check for available software updates first — this is often a straightforward fix.

Read the full misfire / hesitation guide → /failures/ingenium-misfire-hesitation/ [NEW FAILURE PAGE NEEDED]

3. Thermostat Performance Issue (DTC P0128-00)

Symptoms: Check Engine Light, thermostat range performance issue flagged, potential cold-start running problems

Typical mileage: Any mileage — documented on AJ20P6-equipped vehicles

Repair cost: £300–£600 (thermostat assembly replacement)

Replacement cost: N/A — repair only

🟡 Monitor - book inspection soon if warning light appears

Our recommendation:

JLR has identified a thermostat range performance issue on AJ20-P6 engine vehicles, flagged by DTC P0128-00. The fix is to replace the thermostat assembly as per Topix and clear the DTC. This is a relatively straightforward repair. If you see a check engine light, have the codes read — if P0128-00 is present, thermostat replacement is the recommended course of action.

Read the full thermostat failure guide → /failures/thermostat-performance-issue/ [NEW FAILURE PAGE NEEDED]

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Range Rover 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.

Range Rover 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£800–£1,500Component replacement — straightforward fixMisfire / hesitation (software)✅ Yes£200–£400PCM/TCM calibration updateMisfire / hesitation (CVVL)✅ Yes£500–£800CVVL unit replacementThermostat performance issue✅ Yes£300–£600Thermostat assembly replacementHybrid battery failure⚠️ Sometimes£6,000–£10,000+Often warranty-covered; assess cost vs vehicle value

Buying This Range Rover P400e? Check These First

Buy If

Full service history with JLR-approved oil and coolant specs
No history of low coolant warnings or frequent top-ups
Evidence of regular use (hybrid batteries degrade with extended inactivity)
Remaining manufacturer warranty — the P400e is complex and benefits from cover

Avoid If

Low 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 petrol's known issues being addressed
Long periods of inactivity — hybrid battery health is a concern

Closing Verdict

The Range Rover P400e is a sophisticated plug-in hybrid that pairs a 2.0-litre Ingenium petrol engine with a 105kW electric motor. It delivers impressive performance (404 bhp, 640 Nm) and up to 30+ miles of electric-only range. However, the 2.0-litre Ingenium petrol engine has documented issues: charge air cooler coolant leaks, misfire/hesitation, and thermostat performance problems. Buy with documented service history, ideally with remaining manufacturer warranty, and you'll have a genuinely capable and efficient hybrid luxury SUV.

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

→ Compare Range Rover P400e engine prices before you buy

Don't Guess. Compare.

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→ Compare Range Rover P400e engine prices before you buy

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Buying Checklist

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

Coolant Level — Check for frequent top-ups; this is the most common P400e issue

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

Check Engine Light — Any warning lights? Have codes been read? Look for P0128-00

Service History — Including the 2.0-litre Ingenium petrol (AJ20P6) and confirmed coolant system inspections

Hybrid Battery Health — Check electric-only range matches claimed figures (30+ miles)

Charging System — Test both AC and DC charging functionality

Warranty Status — Manufacturer warranty is valuable on these complex vehicles

Drivability — Test for hesitation during acceleration and low-speed running

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.

AJ20P6 (PT204) + 105kW e-motor

Years2019–present

Power404 PS (297 kW) / 640 Nm

2025 Enquiries— (pattern data)

Avg. Recon Cost£6,500–£11,000 [EM-QUOTE]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

AJ20P6 (PT204) + 105kW e-motor2019–present404 PS (297 kW) / 640 Nm— (pattern data)£6,500–£11,000 [EM-QUOTE]

Technical Specs

AJ20P6 / PT204

Displacement1,997 cc (2.0L)

Cylinders4-cylinder inline

Bore / Stroke83 mm / 92.3 mm

Compression Ratio9.5:1

Fuel SystemDirect injection

TurbochargerSingle turbo

Electric Motor105 kW (142.7 PS)

Battery19.2 kWh lithium-ion (15.39 kWh usable)

Combined Power404 PS (297 kW)@5,500 rpm

Combined Torque640 Nm @1,500-4,400 rpm

0-60 mph5.1 seconds

Electric-only range30+ miles

GPFGasoline Particulate Filter fitted

→ Compare Range Rover P400e engine prices for your Land Rover

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Market Intelligence

Most Common Failure

Charge air cooler coolant leak — JLR investigating on Ingenium I4 2.0L petrol engines

Average Enquiry Mileage

30,000

–60,000 miles【PATTERN DATA】

Average Replacement Cost

£6,500

–£11,000 reconditioned【EM-QUOTE】

Most Requested Engine Code

AJ20P6 (PT204)【PATTERN DATA】

Peak Enquiry Season

Spring / Summer — PHEV owners prepare for travel season【PATTERN DATA】

Regional Demand

South East20%

London18%

South West (14%)【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.

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Find the best Land Rover Range Rover P400e engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence — from £6,500 supply-only.

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As standard

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