How much does a Land Rover Defender P400 engine replacement cost in the UK?

A reconditioned 204PT engine typically costs £3,000–£5,000 supply only, with used units available from £1,500–£2,800. Fitting adds £1,300–£1,800 depending on the workshop. Use our calculator for a figure specific to your Defender.

Is the Land Rover Defender P400 engine reliable?

Yes – the 204PT petrol Ingenium is considered more reliable than its diesel counterparts. It has fewer chronic issues; the main concerns are cooling system components (water pump) and occasional timing chain tensioner wear. With good maintenance, these engines are dependable.

What are the common problems with the Land Rover Defender P400?

Water pump and cooling system leaks, timing chain tensioner wear (less common than on diesel Ingenium), and PCV valve failure leading to increased oil consumption. All are well‑understood by JLR specialists.

Is it worth replacing a Defender P400 engine, or should I scrap the car?

Defender values remain high; a P400 is often worth £25,000–£45,000. A £4,000 reconditioned engine is only 10–15% of the vehicle's value – well within the safe threshold. Replacement is almost always worthwhile.

How do I find my Land Rover Defender P400 engine code?

The engine code is 204PT – it's the only petrol four‑cylinder used in the L663 Defender P400. You can also find it on the VIN plate or in the vehicle documentation.

Can I repair the 204PT timing chain, or does it need replacement?

Yes – if caught early, the tensioner and chain can be replaced preventatively (£1,200–£2,000). If the chain jumps and causes valve interference, a full engine replacement (£3,000+) is usually required. Act on any cold‑start rattle.

Land Rover Defender P4002020–present2.0-litre Ingenium Petrol

Land Rover Defender P400 Engine Replacement — Compare Prices & Get Quotes

The Defender P400 packs a 2.0-litre turbocharged Ingenium petrol engine — more refined than the diesels and with fewer chronic issues. Get quotes from UK specialists for reconditioned, rebuilt and used units today.

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Defender P400 Engines — from £1,500 to £6,500Code: 204PT

Defender P400 Engines — from £1,500 to £6,500· Code: 204PT

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

The P400 THROUGH TIME — Era Map

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

GenerationYearsEngine CodeReliabilityRecon CostEra Note

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 P400 Engine Replacement Costs

Supply Only£3,000–£5,000

Fitted (Indie)£4,300–£6,500

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,500–£2,800£2,800–£4,3001–6 monthsBudget priority; lower‑mileage examples

Reconditioned Engine£3,000–£5,000£4,300–£6,50012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£4,200–£6,500£5,500–£8,00012–24 monthsLong‑term ownership; 3+ year horizon

Main Dealer New£7,500–£10,000£9,000–£12,00024–36 monthsInsurance jobs, warranty claims

Figures above reflect the current L663 Defender P400 generation. This badge uses only the 204PT engine — no era ambiguity.

Labour estimate: Fitting a Defender P400 engine typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

→ Compare P400 engine prices from UK specialists

Common Problems

1. Water Pump and Cooling System Leaks

Symptoms: Gradual coolant loss, dampness around the front of the engine, rising temperature gauge, occasional warning light

Typical mileage: 60,000–120,000 miles

Repair cost: £400–£800 (water pump replacement)

Replacement cost: N/A — repair only

🟠 Check - book inspection urgently

Our recommendation:

The 204PT's cooling system is its most common weak point. The water pump and thermostat housing are known to develop leaks, especially on higher‑mileage examples. Catching it early avoids overheating damage. Replace the water pump as a preventative measure at around 60,000 miles – it's a well‑understood job for any JLR specialist.

Read the full coolant leak guide

1. Water Pump and Cooling System Leaks

Symptoms: Gradual coolant loss, dampness around the front of the engine, rising temperature gauge, occasional warning light

Typical mileage: 60,000–120,000 miles

Repair cost: £400–£800 (water pump replacement)

Replacement cost: N/A — repair only

🟠 Check - book inspection urgently

Our recommendation:

Read the full coolant leak guide

2. Timing Chain Tensioner Wear

Symptoms: Rattling noise on cold start for 1–2 seconds, occasional engine warning light if stretch alters cam timing

Typical mileage: 80,000–150,000 miles

Repair cost: £1,200–£2,000 (chain and tensioner replacement)

Replacement cost: £3,000–£5,000 (if chain jumps and causes valve interference)

🟡 Monitor - book inspection soon

Our recommendation:

Unlike the diesel Ingenium, the 204PT's timing chain issues are less catastrophic and less frequent, but they do occur. The tensioner can wear over time. A cold‑start rattle that lasts more than a second or two should be investigated promptly. Preventative replacement at around 80,000–100,000 miles is cheaper than a full engine rebuild.

Read the full timing chain failure guide

3. PCV Valve and Oil Consumption

Symptoms: Increased oil consumption, blue smoke on startup, occasional rough idle

Typical mileage: 70,000–120,000 miles

Repair cost: £200–£400 (PCV valve replacement)

Replacement cost: N/A — repair only

🟡 Monitor - book inspection soon

Our recommendation:

The PCV (positive crankcase ventilation) valve can fail, causing oil to be drawn into the intake. This leads to increased oil consumption and potentially carbon build‑up. Replacement is inexpensive and straightforward. Monitor your oil level between services – if it drops noticeably, have the PCV checked.

Read the full PCV valve failure guide

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Defender P400 — 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 P400 — 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 SenseWater pump leak✅ Yes£400–£800Straightforward replacement — catches before overheatingTiming chain tensioner wear✅ Yes (preventative)£1,200–£2,000Cost‑effective on a well‑maintained example; cheaper than a full engineSnapped timing chain❌ Usually NoEngine replacementValve/piston contact means rebuild or replacePCV valve failure✅ Yes£200–£400Simple and cheap — don't ignore oil consumptionHead gasket failure (overheating)⚠️ Sometimes£1,500–£3,000Viable on low‑mileage or cherished examples

Buying This Defender P400? Check These First

Buy If

Documented water pump replacement or coolant system service history
No rattles on cold start – a quiet start-up suggests healthy timing chain tension
Full service history with correct JLR‑spec oil (0W‑20)
Post‑2021 build (later production has improved cooling system components)

Avoid If

Evidence of repeated coolant top‑ups without a diagnosed leak
Cold‑start rattle that lasts more than a couple of seconds
Poor service history – these engines are sensitive to oil quality
Any engine warning light without a clear diagnosis

Closing Verdict

The 204PT petrol is a solid engine that avoids the major reliability pitfalls of the diesel Ingenium. Its primary weaknesses are cooling system components and, occasionally, timing chain tensioners. A well‑serviced P400 with a fresh water pump is a dependable long‑term proposition. The engine is modern, refined, and parts availability is strong across the UK.

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

→ Compare P400 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 P400 engine prices before you buy

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Buying Checklist

Before you buy a used Land Rover Defender P400 (or before you commit to an engine replacement), check these:

1. Cold Start — Listen for rattles lasting more than 1–2 seconds (timing chain tensioner warning)

2. Service History — including JLR‑spec oil changes (0W‑20) every 16,000 miles or annually

3. Coolant Level — any signs of leaks around the water pump or thermostat housing?

4. Oil Consumption — does it use more than 0.5L per 1,000 miles? (PCV may be failing)

5. Engine Warning Light — have codes been read? Any unresolved issues?

6. MOT History — check for emissions‑related failures (catalyst, O2 sensors)

7. Turbo/Boost — test acceleration; any hesitation or whistling? (turbo issues are rare but possible)

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 — one engine throughout this badge's history.

204PT

Years2020–present

Power296–300 PS (P400)

2025 Enquiries480 [EM-VERIFIED]

Avg. Recon Cost£3,000–£5,000 [EM-QUOTE]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

204PT2020–present296–300 PS (P400)480 [EM-VERIFIED]£3,000–£5,000 [EM-QUOTE]

Technical Specs

204PT

Displacement1,997cc (2.0‑litre)

Cylinders4‑cylinder inline

Compression Ratio10.5:1

Fuel SystemDirect injection (common‑rail)

TurbochargerSingle twin‑scroll turbocharger

→ Compare P400 engine prices for your Defender

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Market Intelligence

Most Common Failure

Water pump and cooling system leaks — the most frequently reported issue with the 204PT

[PATTERN DATA]

Average Enquiry Mileage

65,000

–90,000 miles

[PATTERN DATA]

Average Replacement Cost

£3,000

–£5,000 reconditioned, supply only

[EM-QUOTE]

Most Requested Engine Code

204

PT — the core petrol Ingenium across Defender, Velar, Evoque

[EM-VERIFIED]

Peak Enquiry Season

Spring – off‑road season and pre‑summer vehicle preparation

[PATTERN DATA]

Regional Demand

South East20%

Midlands17%

South West15%

PATTERN DATA

Regional Demand Breakdown

20%South East

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.

Trusted P400 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real Defender P400 owners, as part of the Engine Finders network, across the modern Ingenium era.
Compare P400 Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit, with specialists who genuinely understand the 204PT's cooling system and timing chain nuances.
UK Engine Replacement Services for Defender P400
supply‑only or full supply & fit available nationwide, covering this 2.0‑litre petrol variant with a 12‑month warranty as standard.

Find the best Land Rover Defender P400 engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and keep your Defender performing at its best.

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100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available