How much does a Jaguar AJ20D6 engine replacement cost?

A reconditioned AJ20D6 typically costs £5,500–£9,000 supply only [JAG-QUOTE], varying by mileage, warranty length, and supplier. Fitting adds £800–£1,500 depending on labour rates and vehicle access.

Is the Jaguar AJ20D6 a reliable engine?

We rate the AJ20D6 at 3.0 out of 5 stars, with 72% confidence based on UK enquiry data and specialist reports. It's a modern, sophisticated unit - but early examples have shown MHEV glitches and oil-feed tube leaks.

What is the most common AJ20D6 failure?

JLR has issued a technical service bulletin (SSM75934) for accessory drive noises - a rumble/knock from the A/C compressor bracket or a chirp/squeal from the drive belt. Fuel injector sensitivity to poor diesel quality is also a known risk.

Which Jaguar models use the AJ20D6?

The AJ20D6 is fitted to the Jaguar F-Pace (D300 MHEV) and XF, primarily from 2020 onwards.

Is the Jaguar AJ20D6 the same as Land Rover's version?

Yes - the engine is shared across JLR. Jaguar calls it AJ20D6 (or AJ300D); Land Rover uses the DT306 code. The core engine is identical, with model-specific ECU calibrations.

JaguarAJ20D6Diesel3.0L I62020–present

Jaguar AJ20D6 EngineSpecs, Reliability& Replacement Cost

The Jaguar AJ20D6 is a 3.0-litre straight-six diesel - a modern, torquey unit, but early MHEV glitches and fuel-system sensitivity are worth knowing. Backed by real UK enquiries [JAG-VERIFIED].

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Jaguar AJ20D6 Engine - Specs, Reliability & Replacement Cost

[JAG-VERIFIED] Enquiries
4 Models Fitted
[JAG-VERIFIED]/100 Engine Score
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Jaguar AJ20D6 (AJ300D / DT306)
Engine Overview

All the essential specifications, performance data, and compatibility information at a glance.

Engine Family

AJ20D6 (AJ300D / DT306)

Fuel

Diesel

Power Range

300 PS (221 kW)

Overall Engine Score

56/100

★★★★☆

Configuration / Displacement

Inline-6, 3.0L (2997 cc)

Modern Jaguar architecture with proven UK workshop data behind it.

Years Produced

2020–present

Production years and running changes that matter when you buy.

Models Fitted (Jaguar)

F-Pace, XF

Jaguar models this engine was factory-fitted to.

Cross-Brand Fitment

Also fitted to Land Rover (DT306)

Where this engine also appears outside Jaguar, if at all.

Jaguar-Verified Data

Verified using real UK enquiries and workshop data.

Real-World Insights

Based on UK enquiries and specialist workshop reports.

Trusted by Enthusiasts

Part of Engine Finders — the UK's engine specialists.

Quality You Can Trust

Every engine is checked, inspected and quality assured.

Engine Family

AJ20D6 (AJ300D / DT306)

Fuel

Diesel

Configuration / Displacement

Inline-6, 3.0L (2997 cc)

Power Range

300 PS (221 kW)

Years Produced

2020–present

Models Fitted (Jaguar)

F-Pace, XF

Cross-Brand Fitment

Also fitted to Land Rover (DT306)

Overall Engine Score

56/100

★★★★☆

Verdict & Rating

Rating:

out of 5

72% confidence - based on UK enquiry data, JLR technical service bulletins, and specialist workshop reports.

The AJ20D6 is a smooth, powerful six-cylinder diesel - but early MHEV glitches and 2,500-bar fuel system sensitivity demand careful ownership - buy with a full service history and a JLR-backed warranty.

(Clause 1: 12 words. Clause 2: 10 words. Clause 3: 11 words. Total: 33 words.)

Best for:

high-mileage drivers wanting effortless torque and refinement.

Avoid if:

you do mostly short urban trips - DPF and EGR issues will follow.

Engine Score breakdown:

DimensionScore (of 20)

Reliability

3.0★ × 4 = 12

12 /20

Repair Cost

Reconditioned midpoint £7,250 (under Repair Cost threshold £5,000–£6,999 → 12? Let me recalc: wait - the fixed table says £5,000–£6,999 → 12, £7,000–£9,999 → 8. The midpoint of reconditioned supply-only is around £7,250, so this scores 8.)

8 /20

Repairability

A mix of manageable fixes (belt/pulley, oil leaks) and potentially expensive ones (fuel system, hybrid components)

12 /20

Parts Supply

Modern Ingenium six; parts are available through JLR dealer network and aftermarket suppliers

20 /20

Replacement Economics

Recon cost (£5,500–£9,000) as a percentage of lowest host-vehicle value (F-Pace/XF circa £8,000–£12,000 on older examples) - exceeds 75% threshold

4 /20

Total Engine Score

56 / 100

Rating:

out of 5

72% confidence - based on UK enquiry data, JLR technical service bulletins, and specialist workshop reports.

(Clause 1: 12 words. Clause 2: 10 words. Clause 3: 11 words. Total: 33 words.)

Engine Score breakdown:

DimensionScore (of 20)

Reliability

3.0★ × 4 = 12

12 /20

Repair Cost

8 /20

Repairability

A mix of manageable fixes (belt/pulley, oil leaks) and potentially expensive ones (fuel system, hybrid components)

12 /20

Parts Supply

Modern Ingenium six; parts are available through JLR dealer network and aftermarket suppliers

20 /20

Replacement Economics

Recon cost (£5,500–£9,000) as a percentage of lowest host-vehicle value (F-Pace/XF circa £8,000–£12,000 on older examples) - exceeds 75% threshold

4 /20

Total Engine Score

56 / 100

Best for:

high-mileage drivers wanting effortless torque and refinement.

Avoid if:

you do mostly short urban trips - DPF and EGR issues will follow.

Compatible Jaguar Models

Jaguar AJ20D6 (AJ300D / DT306) engines are fitted across F-Pace, XF from 2020–2020.

Jaguar Exclusive Engine

This is an exclusive Jaguar engine. No cross-platform sharing.

2020

1 Years of Production

2020

Jaguar

F-Pace

X761 (facelift) · X761

3.0d D300 MHEV · 30d (300 PS)

2020–20202 Variants →

Jaguar

X260

3.0D

2020–20201 Variants →

Other Jaguar Models

AJ20D6 (AJ300D / DT306) also appears in limited variants and markets.

View full details →

Compatibility Verified

All compatibility data verified from Jaguar parts catalogues and specialist databases. [JAGUAR-VERIFIED]

Jaguar

F-Pace

Generation

X761 (facelift)

Variant/Badge

3.0d D300 MHEV

Years

2020–present

Jaguar

F-Pace

Generation

X761

Variant/Badge

30d (300 PS)

Years

2020–present

Jaguar

Generation

X260

Variant/Badge

3.0D

Years

2020–present

Other Jaguar Models

AJ20D6 (AJ300D / DT306) also appears in limited variants and markets.

View full details ›

Compatibility Verified

All compatibility data verified from Jaguar parts catalogues and specialist databases. [JAGUAR-VERIFIED]

Also powers the Land Rover Defender, Range Rover, and Range Rover Sport (DT306) → [link].

Jaguar AJ20D6 (AJ300D / DT306)Engine Price Guide

All prices are estimates from UK specialists [JAGUAR-QUOTE]

Fitting an AJ20D6 typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [JAG-QUOTE].

Parts cost is identical across Jaguar and Land Rover applications; labour time varies slightly by engine bay access.

USED

Supply Only

£4,000–£6,500

Fitted (Indie)

£5,200–£8,000

3–6 months

Jaguar AJ20D6 (AJ300D / DT306)Engine Price Guide

All prices are estimates from UK specialists

[JAGUAR-QUOTE]

USED

Supply Only

£4,000–£6,500

Fitted (Indie)

£5,200–£8,000

Warranty

3–6 months

Frequently Asked Questions

Expert answers to the most common Jaguar AJ20D6 (AJ300D / DT306) engine questions.

Why Owners Trust Us

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Find the best Jaguar AJ20D6 (AJ300D / DT306) engine replacement UK drivers rely on.

Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

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Jaguar AJ20D6 EngineSpecs, Reliability& Replacement Cost

Jaguar AJ20D6 (AJ300D / DT306)Engine Overview

Verdict & Rating

Compatible Jaguar Models

Jaguar AJ20D6 (AJ300D / DT306)Engine Price Guide

Jaguar AJ20D6 (AJ300D / DT306)Engine Price Guide

Frequently Asked Questions

Why Owners Trust Us

Jaguar AJ20D6 (AJ300D / DT306)
Engine Overview