How much does a Jaguar F-Pace D300 engine replacement cost in the UK?

A reconditioned D300 3.0-litre Ingenium diesel engine typically costs £5,500–£8,500 supply only. Used engines are available from £3,500–£5,500. Rebuilt engines start from approximately £6,500. Fitting adds £1,300–£2,000 depending on your location and workshop. Main dealer new engines can exceed £14,000.

Is the Jaguar F-Pace D300 engine reliable?

The D300 is widely regarded as the most reliable F-Pace diesel option. The 3.0-litre straight-six Ingenium is significantly more robust than the 2.0-litre diesel, with fewer major failure patterns. However, it has known issues: timing chain stretch (oil dilution from DPF regeneration is a contributing factor), DPF clogging (urban use), and EGR cooler failures. With proper maintenance, the D300 is a durable and rewarding engine.

What are the common problems with the Jaguar F-Pace D300?

The most frequently reported issues are timing chain stretch (accelerated by oil dilution from DPF regeneration), DPF clogging (short urban journeys), and EGR cooler failures. The 3.0-litre is less prone to these issues than the 2.0-litre, but vigilance is still required.

Is it worth replacing a Jaguar F-Pace D300 engine, or should I scrap the car?

Depends on vehicle value. Against a well-kept £40,000 F-Pace D300, a £7,000 recon is 17.5% - definitely worth it. Against a high-mileage £20,000 example, the same recon approaches our 60% Jaguar threshold - get a scrap valuation first.

How do I find my Jaguar F-Pace D300 engine code?

Listed on the VIN plate and vehicle documentation. The D300 carries the engine code AJ20D6 (also referred to as AJ300D in some documentation). It's a 3.0-litre straight-six twin-turbo diesel with 48V mild-hybrid assistance, used in the F-Pace X761 from 2021 onwards.

Can I repair the timing chain, or does it need full engine replacement?

Yes - if caught early. A preventative timing chain and tensioner replacement costs £1,200–£2,500. Oil dilution from failed DPF regenerations is a key contributor to timing chain wear. If ignored and the chain snaps, the engine is an interference design - pistons and valves collide, resulting in catastrophic engine damage. At the first sign of cold-start rattle, book an inspection immediately. Regular oil changes (10,000-mile intervals) are the single most effective preventative measure.

Jaguar F-Pace D3002021–present3.0L Straight-Six Twin-Turbo Diesel MHEV (AJ20D6)

Jaguar F-Pace D300 Engine Replacement - Compare Prices & Get Quotes

Name: Jaguar F-Pace D300 UK Engine Enquiry Data 2025
Creator: JaguarEngine.uk

Get quotes today from trusted UK Jaguar F-Pace specialists. Compare reconditioned, rebuilt and used 3.0-litre straight-six twin-turbo diesel engines with MHEV - supply & fit available nationwide.

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Jaguar F-Pace D300 Engines - from £4,000 to £9,500Code: AJ20D6 / AJ300D

Jaguar F-Pace D300 Engines - from £4,000 to £9,500· Code: AJ20D6 / AJ300D

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

The D300 THROUGH TIME Era Map

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

Era Note

One engine throughout this badge's history - no era ambiguity.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

2021–presentAJ20D6 / AJ300D (3.0L Straight-Six Twin-Turbo Diesel MHEV)★★★★☆ [NEWLY ASSIGNED - see Data Note]£5,500–£8,500 [PLACEHOLDER - confirm vs cost sheet]One engine throughout this badge's history - no era ambiguity.

Why use this era map?

This table is the single source every other section on this page matches - Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Jaguar F-Pace D300 Engine Replacement Costs

Supply Only£5,500–£8,500

Fitted (Indie)£6,800–£10,000

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£3,500–£5,500£4,800–£7,2001–6 monthsBudget priority; lower-mileage examples

Reconditioned Engine£5,500–£8,500£6,800–£10,00012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£6,500–£9,500£7,800–£11,00012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£10,000–£14,000+£11,500–£16,000+24–36 monthsInsurance jobs, warranty claims

Figures above reflect the AJ20D6 3.0-litre Ingenium diesel engine. Rebuilt engines are available from approximately £6,500. Main dealer new engines can exceed £14,000.

Labour estimate: Fitting an F-Pace D300 engine typically takes 14–18 hours at £75–£110/hr (independent) or £130–£180/hr (London/SE dealer).

Compare D300 engine prices from UK specialists

Common Problems

1. Timing Chain Stretch & Oil Dilution

Symptoms: Rattling noise on cold start, metallic ticking from the engine, engine warning light, DPF filling prematurely, oil level rising on the dipstick.

Typical mileage: 50,000–100,000 miles

Repair cost: £1,200–£2,500 (chain + tensioner replacement)【PLACEHOLDER - confirm vs cost sheet】

Replacement cost: £5,500–£9,500 (if chain snaps and pistons strike valves)

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

Oil dilution from failed DPF regenerations is a key contributor to timing chain wear on Ingenium diesel engines. Stretched timing chains can cause the DPF to fill prematurely, creating a cascade of failures. The 3.0-litre is less prone to this than the 2.0-litre, but vigilance is still required. At the first sign of cold-start rattle, get the chain and tensioners inspected immediately. Regular oil changes using the correct 0W-20 JLR-spec oil are essential.

Read the full timing chain failure guide

1. Timing Chain Stretch & Oil Dilution

Symptoms: Rattling noise on cold start, metallic ticking from the engine, engine warning light, DPF filling prematurely, oil level rising on the dipstick.

Typical mileage: 50,000–100,000 miles

Repair cost: £1,200–£2,500 (chain + tensioner replacement)【PLACEHOLDER - confirm vs cost sheet】

Replacement cost: £5,500–£9,500 (if chain snaps and pistons strike valves)

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

Read the full timing chain failure guide

2. DPF Clogging & Regeneration Issues

Symptoms: DPF warning light, reduced performance, increased fuel consumption, failed regeneration cycles, oil dilution.

Typical mileage: 40,000–80,000 miles (urban-driven vehicles)

Repair cost: £300–£900 (forced regeneration, DPF clean)【PLACEHOLDER - confirm vs cost sheet】

Replacement cost: N/A - repair only

🟡 Monitor - book inspection soon

Our recommendation:

The Ingenium diesel's DPF is sensitive to short urban journeys. The MHEV system helps but doesn't eliminate the risk. If you predominantly drive in town, ensure the vehicle completes regular regeneration cycles - a motorway run at 2,000+ rpm for 20 minutes at least once a week is recommended. The 3.0-litre is less prone to these issues than the 2.0-litre, but they remain a known pattern.

Read the full DPF failure guide

3. EGR Cooler Failures

Symptoms: Coolant loss with no visible external leak, white exhaust smoke, engine management light, overheating.

Typical mileage: 40,000–80,000 miles

Repair cost: £500–£1,000 (EGR cooler replacement)【PLACEHOLDER - confirm vs cost sheet】

Replacement cost: N/A - repair only

🟠 Check - book inspection urgently

Our recommendation:

EGR cooler failure is a well-documented issue across the Ingenium diesel family. If you're experiencing unexplained coolant loss, have the EGR cooler inspected promptly. Ignoring it can lead to overheating and potential engine damage, though it doesn't typically progress to full engine replacement.

Read the full EGR cooler failure guide

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F-Pace D300 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.

F-Pace D300 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 SenseTiming chain stretch✅ Yes£1,200–£2,500Preventative - catches the fault before catastrophic failureDPF clogging✅ Yes£300–£900Forced regeneration or DPF clean - less than replacementEGR cooler failure✅ Yes£500–£1,000Specialist repair available; cheaper than engine replacementOil dilution✅ Yes£100–£300More frequent oil changes (10,000-mile intervals)Timing chain snap (valve contact)❌ Usually No£5,500–£9,500Typically requires full engine replacement or complete rebuild

Buying This D300? Check These First

Buy If

Full Jaguar service history with evidence of regular oil changes using 0W-20 JLR-spec oil - ideally every 10,000 miles
Evidence of DPF-friendly driving - regular motorway runs
No cold-start rattle - a quiet startup suggests healthy timing chain
Post-2021 build with the revised Ingenium diesel

Avoid If

No proof of regular oil changes - the Ingenium diesel is unforgiving of neglect
DPF warning light with no regeneration history
Cold-start rattle with no timing chain inspection
Engine warning light with timing, EGR, or DPF codes and no diagnosis

Closing Verdict

The D300 is the pick of the F-Pace diesel range - a smooth, powerful straight-six that represents JLR's most refined diesel engine. It's significantly more robust than the 2.0-litre diesel, with fewer reported issues. But it's still a modern diesel with modern diesel problems - timing chain vigilance, DPF maintenance, and EGR cooler attention are the price of entry. Buy on documented history, not on faith. A well-maintained D300 is a £35,000–£55,000 premium SUV; a neglected one is a £7,000 engine replacement waiting to happen.

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

Compare D300 engine prices before you buy

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Buying Checklist

Before you buy a used Jaguar F-Pace D300 (or before you commit to an engine replacement), check these:

Cold Start

Listen for rattling or metallic ticking (timing chain stretch warning)

Service History

including the D300 era (2021–present) and confirmed oil-change intervals using 0W-20 JLR-spec oil - ideally every 10,000 miles

DPF Check

Check for DPF warning light or evidence of regeneration issues (urban-driven vehicles are high risk)

Oil Level

Check the dipstick; rising oil level indicates fuel dilution from failed DPF regenerations

Smoke Check

White smoke on startup can indicate EGR coolant leak

Coolant Level

Any history of coolant loss without visible leaks? (EGR cooler warning)

Engine Warning Light

Have codes been read? Any unresolved timing, EGR, DPF, or cooling system issues?

MOT History

Check for emissions-related failures

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.

AJ20D6 / AJ300D (3.0L Straight-Six Twin-Turbo Diesel MHEV)

Years2021–present

Power300 PS (221 kW / 296 bhp) @ 4,000 rpm · 650 Nm @ 1,500–2,500 rpm

2025 Enquiries- (pattern data)

Avg. Recon Cost£5,500–£8,500 [PLACEHOLDER - confirm vs cost sheet]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

AJ20D6 / AJ300D (3.0L Straight-Six Twin-Turbo Diesel MHEV)2021–present300 PS (221 kW / 296 bhp) @ 4,000 rpm · 650 Nm @ 1,500–2,500 rpm- (pattern data)£5,500–£8,500 [PLACEHOLDER - confirm vs cost sheet]

Technical Specs

AJ20D6 / AJ300D

Displacement2,997 cc

CylindersStraight-6, 4 valves per cylinder

Compression Ratio15.5:1

Fuel SystemCommon-rail direct injection

TurbochargerTwin-turbocharged with 48V MHEV system

→ Compare D300 engine prices for your Jaguar

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Market Intelligence

Most Common Failure

Timing chain stretch

oil dilution from DPF regeneration is a key contributor

Average Enquiry Mileage

35,000

–60,000 miles

[PATTERN DATA]

Average Replacement Cost

£5,500

–£8,500 reconditioned, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

AJ20D6 / AJ300D

[PATTERN DATA]

Peak Enquiry Season

Winter

cold starts expose timing chain and DPF issues【PATTERN DATA】

Regional Demand

South East20%

London18%

Midlands14%

PATTERN DATA

Regional Demand Breakdown

20%South East

18%London

Frequently Asked Questions

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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see prices, warranty terms and supply & fit options side-by-side before you commit, across every X761 that left the factory with this refined 3.0-litre straight-six diesel.
UK Engine Replacement Services for D300
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