How much does a Land Rover Velar D300 engine replacement cost in the UK?

A reconditioned 306DT V6 diesel typically costs £6,500–£9,500 supply only; the AJ20D6 Ingenium costs £5,500–£8,200. Fitting adds £1,500–£2,200. Use our calculator for a figure specific to your Velar.

Is the Velar D300 engine reliable?

It depends which engine your D300 has. The 306DT V6 (2017–2020) is a capable engine but has a known crankshaft bearing fatigue risk — 5,000-mile oil changes are essential. The AJ20D6 Ingenium (2021+) is a more modern, reliable design with EGR cooler and cooling system watchpoints. Check the Era Map above for your specific car.

What are the common problems with the Velar D300 engine?

On the 306DT V6: crankshaft bearing failure, turbo contamination, and injector issues. On the AJ20D6 Ingenium: EGR cooler leaks, cooling system issues, and DPF regeneration problems. The engine choice defines the risk profile — check which era your car is from.

Is it worth replacing a Velar D300 engine, or should I scrap the car?

Depends on vehicle value. An L560 Velar D300 is a £15,000–£35,000 vehicle — a £6,500–£8,000 recon is 19–53% of the car's value. This sits at or below our 60% Land Rover scrap threshold for most examples. A well-maintained, higher-value example justifies replacement; a tired, high-mileage one may not.

How do I find my Velar D300 engine code?

Listed on the VIN plate and vehicle documentation. The D300 badge covers two engines: 306DT V6 (2017–2020) and AJ20D6 Ingenium (2021+). Tell us your registration date and we'll confirm which one you have for free.

How do I prevent the common failures on a D300?

For the 306DT V6: 5,000-mile oil changes are essential to prevent crankshaft bearing failure. For the AJ20D6 Ingenium: monitor coolant levels for EGR cooler leaks and replace the water pump preventatively at 60,000–80,000 miles. Both engines need regular long runs for DPF health.

Land Rover Velar D3002017–present306DT / AJ20D6

Land Rover Velar D300 Engine Replacement — Compare Prices & Get Quotes

The D300 badge covers two distinct diesel powertrains on the L560 Velar — the 3.0 V6 (306DT) from 2017–2020 and the inline‑six Ingenium (AJ20D6) from 2021 onward. Get quotes from trusted UK specialists today.

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Velar D300 Engines — from £3,500 to £11,000306DT / AJ20D6

Velar D300 Engines — from £3,500 to £11,000· 306DT / AJ20D6

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The VELAR D300 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

Land Rover Velar D300 Engine Replacement Costs

Supply Only£5,500–£9,500

Fitted (Indie)£7,000–£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£5,500–£9,500£7,000–£11,50012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£7,000–£11,000£8,500–£13,00012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£11,000–£15,000£12,500–£17,00024–36 monthsInsurance jobs, warranty claims

Figures above reflect both engine eras; specific costs vary by engine — see the Era Map above.

Labour estimate: Fitting a Velar D300 engine typically takes 14–20 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

→ Compare Velar D300 engine prices from UK specialists

Common Problems

1. Crankshaft Bearing Failure (306DT, 2017–2020)

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

Typical mileage: 80,000–140,000 miles

Repair cost: N/A — requires bottom‑end rebuild or replacement

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

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

Our recommendation:

This is the defining issue of the 306DT. The crankshaft bearing has a fatigue life. The key defence is 5,000‑mile oil changes with JLR‑spec oil, not the factory 15,000‑mile schedule. If you hear a rumble or knock on cold start, have the oil pressure checked 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 (306DT, 2017–2020)

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

Typical mileage: 80,000–140,000 miles

Repair cost: N/A — requires bottom‑end rebuild or replacement

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

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

Our recommendation:

2. EGR Cooler Leak (AJ20D6, 2021+)

Symptoms: Coolant loss with no visible external leak, white exhaust smoke, burning smell, engine warning light.

Typical mileage: 40,000–80,000 miles

Repair cost: £600–£1,200 (EGR cooler replacement) [PLACEHOLDER]

Replacement cost: N/A — repair only (if caught before overheating)

🟠 Check - book inspection urgently if coolant levels drop

Our recommendation:

The EGR cooler on the AJ20D6 is a known weak point. If you notice unexplained coolant loss or white smoke, have the EGR cooler inspected. Catching it early prevents overheating damage. Later revisions (post‑2022) have improved the design, but it remains a watchpoint.

3. DPF Regeneration Issues (Both Engines)

Symptoms: DPF warning light, reduced power, increased fuel consumption, stop‑start unavailable.

Typical mileage: 30,000–80,000 miles (depends on usage)

Repair cost: £300–£800 (forced regeneration or clean) [PLACEHOLDER]

Replacement cost: N/A — repair only (unless physically damaged)

🟡 Monitor - book inspection soon

Our recommendation:

Both engines need regular long runs for passive DPF regeneration. If your D300 is used primarily for short journeys, plan a 30–45 minute motorway run every two weeks. If the DPF warning light comes on, book a forced regeneration promptly.

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Velar 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.

Velar 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 SenseCold‑start rumble (306DT bearing wear)⚠️ Sometimes£5,500–£7,000 (bottom‑end rebuild)Only if caught before crank is scored — act on first knockEGR cooler leak (AJ20D6)✅ Yes£600–£1,200Straightforward — catch it before it causes overheatingDPF regeneration issues✅ Yes£300–£800Routine maintenance — forced regen or cleanSnapped crankshaft (306DT)❌ Usually NoEngine replacementCatastrophic — full replacement requiredSevere overheating damage (AJ20D6)❌ Usually NoEngine replacementLittle left to salvage — replacement is the only option

Buying This Velar D300? Check These First

Buy If

306DT (2017–2020): documented 5,000‑mile oil change history — no cold knock
AJ20D6 (2021+): EGR cooler replaced or inspected — no coolant loss
Regular long runs (DPF health) — or proof of forced regenerations
Full JLR service history with correct oil spec for the engine era

Avoid If

306DT: cold‑start knock or rumble — walk away
306DT: no record of regular oil changes — this engine is unforgiving
AJ20D6: coolant loss with no diagnosis — EGR cooler may be failing
Any engine: engine warning light with no diagnosis — potentially expensive

Closing Verdict

The D300 badge represents two very different engines. The 306DT V6 is powerful but has a known Achilles heel — crank bearing failure, preventable only with aggressive oil changes. The AJ20D6 Ingenium is more modern and reliable, with EGR cooler and cooling system as its main watchpoints. Buy on full, era‑appropriate service history — and never ignore a cold knock.

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

→ Compare Velar D300 engine prices before you buy

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Buying Checklist

Before you buy a used Land Rover Velar D300 (or before you commit to an engine replacement), check these:

Cold Start (306DT) — Listen for rumble/knock that fades as engine warms — crank bearing warning

Coolant Level (AJ20D6) — Check for unexplained loss — EGR cooler leak indicator

Service History — including which engine era (306DT or AJ20D6) and confirmed oil‑change intervals

Oil Clarity (306DT) — Check dipstick; metallic glitter indicates bearing wear

DPF Status — Check for warning lights; short journeys cause clogging

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.

306DT (3.0 V6 diesel)

Years2017–2020

Power300 PS (296 bhp) @ 4,000 rpm; 700 Nm @ 1,500–2,500 rpm

2025 Enquiries980 [EM-VERIFIED]

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

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

306DT (3.0 V6 diesel)2017–2020300 PS (296 bhp) @ 4,000 rpm; 700 Nm @ 1,500–2,500 rpm980 [EM-VERIFIED]£6,500–£9,500 [PLACEHOLDER]

AJ20D6 (3.0 inline‑six diesel)2021–present300 PS (296 bhp) @ 4,000 rpm; 650 Nm @ 1,500–2,500 rpm— (pattern data)£5,500–£8,200 [PLACEHOLDER]

Technical Specs

AJ20D6 3.0 inline‑six

Displacement2,993 cc

Cylinders6‑cylinder V‑configuration

Compression Ratio16.1:1

Fuel SystemCommon‑rail direct injection

TurbochargerVariable‑geometry turbo (VGT)

Displacement2,997 cc

Cylinders6‑cylinder inline

Compression Ratio15.5:1

Fuel SystemCommon‑rail direct injection

TurbochargerVariable‑geometry with electric wastegate

→ Compare Velar D300 engine prices for your Land Rover

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Market Intelligence

Most Common Failure

306

DT: crankshaft bearing fatigue / AJ20D6: EGR cooler leak

[PATTERN DATA]

Average Enquiry Mileage

85,000

miles

[PATTERN DATA]

Average Replacement Cost

£7,500

reconditioned, supply only

[PLACEHOLDER]

Most Requested Engine Code

306

DT (980 enquiries) / AJ20D6 (growing)

[EM-VERIFIED]

Peak Enquiry Season

Winter — cold starts expose bearing issues

[PATTERN DATA]

Regional Demand

South East19%

South West16%

London14%

PATTERN DATA

Regional Demand Breakdown

19%South East

14%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.

Find the best Land Rover Velar D300 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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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