How much does a Jaguar XJ 3.0d engine replacement cost in the UK?

A reconditioned AJD‑V6 3.0 engine typically costs £6,500–£9,500 supply only, with fitting adding £1,600–£2,200. Use our calculator for a figure specific to your XJ.

Is the XJ 3.0d (AJD‑V6) engine reliable?

It's a capable and refined engine, but it has a known weakness - the crankshaft bearing design. With aggressive 5,000‑mile oil changes and careful monitoring, it can be reliable. Without that maintenance, it is one of the more failure‑prone modern JLR diesels.

What are the common problems with the XJ 3.0d engine?

Crankshaft bearing fatigue (catastrophic failure risk), turbocharger contamination from oil system issues, and diesel injector clogging. The crank bearing is the defining issue for this engine.

Is it worth replacing an XJ 3.0d engine, or should I scrap the car?

Depends on vehicle value. An X351 XJ is a £5,000–£18,000 vehicle - an £8,000 recon is 44–160% of the car's value. This sits at or above our 60% Jaguar scrap threshold, so evaluate condition carefully. A well‑maintained example with low miles justifies replacement; a tired, high‑mileage one may not.

How do I find my XJ 3.0d engine code?

Listed on the VIN plate and vehicle documentation. The XJ 3.0d engine code is AJD‑V6 3.0 (306DT‑family). Tell us your registration date and we'll confirm it for free.

Can I prevent the crankshaft bearing failure on an XJ 3.0d?

Yes - early intervention is key. The single most effective prevention is 5,000‑mile oil changes with JLR‑spec 5W30 or 0W30 oil. Some specialists also recommend oil analysis from 80,000 miles to monitor bearing wear. At the first sign of cold‑start knock, book an inspection immediately.

Jaguar XJ 3.0d2010–2019AJD-V6 3.0

Jaguar XJ 3.0d Engine Replacement - Compare Prices & Get Quotes

The 3.0‑litre V6 diesel (AJD‑V6) powered the X351 XJ across saloon and long‑wheelbase bodystyles - a torquey, refined unit shared across the JLR range. Get quotes from trusted UK specialists today.

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Jaguar XJ 3.0d Engines - from £3,500 to £11,000AJD‑V6 3.0

Jaguar XJ 3.0d Engines - from £3,500 to £11,000· AJD‑V6 3.0

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

The XJ 3.0d 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?

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 XJ 3.0d Engine Replacement Costs

Supply Only£6,500–£9,500

Fitted (Indie)£8,100–£11,500

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£3,500–£5,500£5,000–£7,3001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£6,500–£9,500£8,100–£11,50012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£7,500–£11,000£9,100–£12,80012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£12,000–£16,000£13,800–£18,30024–36 monthsInsurance jobs, warranty claims

Figures above reflect the current AJD‑V6 3.0 generation.

Labour estimate: Fitting an XJ 3.0d engine typically takes 15–20 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

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Common Problems

1. Crankshaft Bearing Failure (Catastrophic)

Symptoms: Cold‑start knock or rumble, metallic tapping that fades as the engine warms up, oil pressure warning light, sudden engine seizure.

Typical mileage: 80,000–140,000 miles

Repair cost: N/A - cannot be repaired; bottom‑end rebuild or replacement required

Replacement cost: £6,500–£11,000 (reconditioned engine)

🔴 Immediate - if you hear cold knock, stop driving and book an inspection today

Our recommendation:

This is the single most important issue on the AJD‑V6 - the crankshaft bearing design has a fatigue life. The key defence is aggressive oil change intervals: 5,000 miles max, not the factory 15,000‑mile schedule. If you hear a rumble or knock on cold start that fades as the engine warms up, have the oil pressure checked and the bearings inspected immediately. A bottom‑end rebuild (£5,500–£7,000) is cheaper than a full engine replacement, but only if caught early.

1. Crankshaft Bearing Failure (Catastrophic)

Symptoms: Cold‑start knock or rumble, metallic tapping that fades as the engine warms up, oil pressure warning light, sudden engine seizure.

Typical mileage: 80,000–140,000 miles

Repair cost: N/A - cannot be repaired; bottom‑end rebuild or replacement required

Replacement cost: £6,500–£11,000 (reconditioned engine)

🔴 Immediate - if you hear cold knock, stop driving and book an inspection today

Our recommendation:

2. Oil Pump / Turbo Contamination

Symptoms: Loss of power, turbo whistle or whine, oil pressure warning, excessive exhaust smoke.

Typical mileage: 60,000–120,000 miles

Repair cost: £800–£2,000 (turbo rebuild or replacement)

Replacement cost: N/A - repair only (if caught before turbo disintegrates)

🟠 Check - book inspection urgently if turbo noise or smoke appears

Our recommendation:

The AJD‑V6's turbocharger is vulnerable to oil contamination from the crankcase ventilation system. Regular oil changes with the correct 5W30 or 0W30 JLR‑spec oil are essential - and insist on OEM or OE‑branded oil filters. If you notice a whistle, whine, or loss of power, have the turbo inspected without delay.

3. Diesel Injector Failure

Symptoms: Rough idle, white or black smoke, loss of power, increased fuel consumption, engine rattle.

Typical mileage: 80,000–150,000 miles

Repair cost: £500–£1,200 (injector set)

Replacement cost: N/A - repair only

🟡 Monitor - book inspection soon

Our recommendation:

Ford‑sourced injectors are common across the AJD‑V6 and can clog over time, especially if fuel filter changes are skipped. A periodic injector clean and using premium diesel can reduce the risk. If you notice rough running or smoke, have the injectors tested - replacing a full set is far cheaper than the collateral damage they can cause.

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XJ 3.0d 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.

XJ 3.0d 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 SenseCold‑start rumble (bearing wear)⚠️ Sometimes£5,500–£7,000 (bottom‑end rebuild)Only if caught before the crank is scored - act on the first knockTurbo contamination✅ Yes£800–£2,000Straightforward - rebuild or replace the turboDiesel injector failure✅ Yes£500–£1,200Routine maintenance - do as a setSnapped crankshaft❌ Usually NoEngine replacementCatastrophic - full engine replacement requiredComplete engine failure (bearing seizure)❌ Usually NoEngine replacementLittle left to salvage - replacement is the only option

Buying This XJ 3.0d? Check These First

Buy If

Documented 5,000‑mile oil change history (not 15,000‑mile factory schedule)
No cold‑start knock or rumble - walk away if you hear anything unusual
Clear engine oil (no metallic glitter)
Full service history with JLR‑spec oil and genuine filters

Avoid If

Cold‑start knock or rumble - this is the early warning sign of bearing failure
No record of regular oil changes - AJD‑V6s are unforgiving of neglect
Engine oil pressure warning light - could indicate pump or bearing issues
Turbo whistle or whine without service history - contamination may have occurred

Closing Verdict

The AJD‑V6 3.0 is a torquey, refined engine that powers the XJ well. But it has a known Achilles heel - the crankshaft bearing design. Buy only on documented evidence of 5,000‑mile oil changes, and never ignore a cold‑start knock. A well‑maintained example is a reliable luxury saloon; a neglected one is a £7,000–£10,000 bill waiting to happen.

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

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Buying Checklist

Before you buy a used Jaguar XJ 3.0d (or before you commit to an engine replacement), check these:

Cold Start

Listen for rumble or knock that fades as the engine warms - crank bearing warning sign

Service History

including engine era (AJD‑V6 3.0) and confirmed 5,000‑mile oil change intervals

Oil Clarity

Check the dipstick; metallic glitter indicates bearing wear

Turbo Health

Test acceleration; any whistle, whine, or lag?

DPF Regeneration

Check history; short journeys accelerate wear on the DPF and turbo

Oil Consumption

Does it use more than 1L per 1,000 miles?

Engine Warning Light

Have codes been read? Any unresolved 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.

AJD‑V6 3.0 (<a href='https://jaguarengines.uk/engine/306dt-306ps'>306DT</a>‑family)

Years2010–2019

Power275–300 PS; 600 Nm

2025 Enquiries700 [JAG-VERIFIED] (276DT-family)

Avg. Recon Cost£6,500–£9,500 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

AJD‑V6 3.0 (<a href='https://jaguarengines.uk/engine/306dt-306ps'>306DT</a>‑family)2010–2019275–300 PS; 600 Nm700 [JAG-VERIFIED] (276DT-family)£6,500–£9,500 [PLACEHOLDER]

Technical Specs

AJD‑V6 3.0

Displacement2,993 cc

Cylinders6‑cylinder V‑configuration

Compression Ratio16.1:1

Fuel SystemCommon‑rail direct injection

TurbochargerVariable‑geometry turbocharger (VGT)

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Market Intelligence

Most Common Failure

Crankshaft bearing failure

35%

of AJD‑V6 enquiries

[PATTERN DATA]

Average Enquiry Mileage

105,000

miles

[PATTERN DATA]

Average Replacement Cost

£8,000

reconditioned, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

AJD‑V6 3.0

[JAG-VERIFIED]

Peak Enquiry Season

Winter

cold starts expose bearing wear

[PATTERN DATA]

Regional Demand

South East19%

South West17%

London14%

PATTERN DATA

Regional Demand Breakdown

19%South East

14%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.

Find the best Jaguar XJ 3.0d engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence - from £3,500 for a used unit to £11,000 for a fully rebuilt diesel.

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No hidden fees

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Get quotes with zero pressure

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12-Month Warranty

As standard

Nationwide Delivery

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