How much does a Range Rover Sport D300 engine replacement cost-

A rebuilt Range Rover Sport D300 (AJ300D) engine typically costs between £5,500 and £8,500 for supply only, while reconditioned units start from £4,500.

What are the signs of AJ300D engine failure in a Range Rover Sport D300-

Owners often report frequent DPF or AdBlue warning lights, sudden loss of power, or rough idling when the battery is depleted.

Is it worth replacing the engine in a 2022+ Range Rover Sport D300-

Yes-modern Range Rover Sport D300 models retain very strong values, typically between £55,000 and £90,000+.

How long does a Range Rover Sport D300 engine replacement take-

A standard supply and fit service for the Range Rover Sport D300 typically takes 3 to 4 days.

Does the AJ300D engine replacement retain the 48V mild-hybrid system-

Yes-every rebuilt or reconditioned AJ300D engine supplied through EnginesMarket is fully compatible with the L461’s 48V MHEV architecture.

Range Rover Sport D300 SPECIALISTS

Range Rover Sport D300 Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Range Rover Sport D300 engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective solution for your modern L461 Range Rover Sport.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

100+ Suppliers

Range Rover Sport D300 Engine

from£5,500 to £8,500...

Usedfrom £2,500
Reconditionedfrom £4,500
Common codesAJ300D

Land Rover range-rover-sport D300 Used Engine — AJ300D

Land Rover range-rover-sportUsed Engine — AJ300D

Land Rover range-rover-sport D300 Reconditioned Engine — AJ300D

Land Rover range-rover-sportReconditioned Engine — AJ300D

Land Rover range-rover-sport D300 Rebuilt Engine — AJ300D

Land Rover range-rover-sportRebuilt Engine — AJ300D

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

How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Range Rover Sport D300 Engine History & Specs at a Glance

When the D300 variant was introduced to the third-generation L461 Range Rover Sport in 2022, it brought refined 3.0-litre Ingenium mild-hybrid diesel technology to the mid-tier lineup, offering an optimal balance of daily drivability, fuel economy, and substantial towing torque.

2022
AJ300D (3.0L MHEV Diesel), 300hp, introduced with the all-new L461 Range Rover Sport, featuring a 48V mild-hybrid system, twin-turbocharging, and advanced emissions controls.
2023
present - Minor ECU and calibration updates; core AJ300D architecture remains unchanged across model years.

Every engine fitted to the Range Rover Sport D300 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Range Rover Sport D300 Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

AJ300D — 3.0L Diesel Mild Hybrid (2022-present)

Power Output: 300hp
Years Fitted: 2022-present

Can’t find your exact engine code?-> Get quotes for AJ300D Range Rover Sport D300 engine replacement

-> Get quotes for AJ300D Range Rover Sport D300 engine replacement

Common failure points and repair options

DPF Regeneration & EGR Carbon Buildup

Affected: Range Rover Sport D300 (AJ300D, 2022-present)
Typical failure mileage: 40,000-100,000 miles

Root cause

Frequent short-trip urban driving prevents complete passive DPF regenerations, leading to soot accumulation and EGR valve clogging, which restricts airflow and triggers warning lights.

Repair options

Repair tier	Dealer price	Specialist price
Minor/Preventative	£400-£800	£250-£500
Full Replacement - rebuilt/reconditioned engine	£8,000-£11,000	£5,500-£8,500 [ESTIMATED]

Our recommendation

For early signs of DPF restriction or AdBlue faults, targeted specialist repair is highly cost-effective. However, if the AJ300D has suffered catastrophic overheating, severe internal wear, or repeated emissions system failures, a full rebuilt engine with upgraded internals offers the best long-term reliability and protects your significant vehicle investment.

SCR/AdBlue System Faults

Affected: Range Rover Sport D300 (AJ300D, 2022-present)
Typical failure mileage: 50,000-120,000 miles

Root cause

NOx sensor failures or AdBlue heater malfunctions are common in colder climates or with inconsistent fluid quality, triggering limp mode and preventing engine restarts once the countdown expires.

Repair options

Repair tier	Dealer price	Specialist price
Minor/Preventative	£600-£1,200	£400-£800
Full Replacement - rebuilt/reconditioned engine	£8,000-£11,000	£5,500-£8,500 [ESTIMATED]

Our recommendation

-> Compare rebuilt AJ300D Range Rover Sport D300 engine prices

Don't Let Engine Failure Write Off Your Range Rover Sport D300

Don’t risk a costly emissions or internal failure ruining your premium L461 Range Rover Sport. By comparing quotes through EnginesMarket, you secure a rebuilt or reconditioned AJ300D engine with upgraded components that address known weak points, all backed by a comprehensive 12-month unlimited mileage warranty. Avoid main dealer premiums and benefit from nationwide supply and fit options tailored to your exact vehicle.

Compare Range Rover Sport D300 Engine Replacement Prices Now ->

FAQ

Range Rover Sport D300 Engine ReplacementFrequently Asked Questions

Everything Range Rover Sport D300 owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Range Rover Sport D300 Engine Prices Today

Don’t overpay at the main dealer. Comparing quotes through EnginesMarket is 100% free and no-obligation, connecting you directly with vetted UK specialists who hold verified, warranty-backed replacement engines specifically for your Range Rover Sport D300.

100+100+ Range Rover Sport D300 engines supplied through our network

12-Month12-Month Warranty on every rebuilt Range Rover Sport D300 engine

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