Range Rover Sport D300 Engine ReplacementCompare 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
From £5,500 to £8,500 [ESTIMATED - using Land Rover 3.0L Ingenium diesel as proxy]
Used from £2,500 · Reconditioned from £4,500 · Common codes: AJ300D
From £2,500
Tested, bare/short engine
From £4,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Range Rover Sport D300 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Range Rover Sport D300 Replacement Engineto Finding the Best Range Rover Sport D300 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryRange 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.
Variant HistoryRange 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.
Range Rover Sport D300
Fuel TypeDiesel Mild Hybrid (MHEV)
Engine Size Range3.0L (2997cc)
Power Output Range300hp (221kW)Engine History Timeline
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.
present - Minor ECU and calibration updates; core AJ300D architecture remains unchanged across model years.
Key Specs Snapshot
Fuel TypeDiesel Mild Hybrid (MHEV)Engine Size Range3.0L (2997cc)Power Output Range300hp (221kW)Years Produced2022-presentEvery engine fitted to the Range Rover Sport D300 is covered below, with UK rebuilt pricing and known failure points.
Range Rover Sport D300 Engine Codes - Specifications & Replacement CostRange Rover Sport D300 Engine Codes - Specifications & Replacement Cost
3.0L Diesel Mild Hybrid (2022-present)
Power Output300hpYears Fitted2022-present
Compatible Trim Levels
- Range Rover Sport D300 S
- Range Rover Sport D300 SE
- Range Rover Sport D300 HSE
- Range Rover Sport D300 Dynamic HSE
- Range Rover Sport D300 Autobiography (all include 48V MHEV system)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,500
Reconditioned
Addressed known issues, tested
£4,500-£6,500
Rebuilt
Full teardown, upgraded internals
£5,500-£8,500
Common Failure
DPF regeneration issues from short journeys, SCR/AdBlue system faults (NOx sensor failures), and EGR valve carbon buildup are commonly reported issues, typically emerging between 40,000 and 100,000 miles.
The Range Rover Sport D300 (AJ300D) delivers strong efficiency and torque, but like other modern Ingenium diesels, it is susceptible to specific emissions and cooling system wear points. Rebuilt engines sourced through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.
Why the Range Rover Sport D300 AJ300D Loses Efficiency
Affected Vehicles
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.
Why It Happens
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.
Dealer (parts + labour)
£400-£800
Specialist (parts + labour)
£250-£500
What it involves
Forced DPF regeneration and EGR valve cleaning.
Suitability
Viable if caught early with no severe back-pressure damage.
1 - 2 daysDealer (parts + labour)
£8,000-£11,000
Specialist (parts + labour)
£5,500-£8,500 [ESTIMATED]
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty.
Suitability
Necessary if severe blockage causes back-pressure damage or hydrolock.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor/Preventative Minor | £400-£800 | £250-£500 | Forced DPF regeneration and EGR valve cleaning. | Viable if caught early with no severe back-pressure damage. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£11,000 | £5,500-£8,500 [ESTIMATED] | Supply & fit, upgraded components addressing the original failure point, 12-month warranty. | Necessary if severe blockage causes back-pressure damage or hydrolock. | 1 - 2 days |
Our Recommendation
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.
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.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Range Rover Sport D300. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Range Rover Sport D300 Engine ReplacementFrequently Asked Questions
Question 1How 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.
- Prices include full MHEV system compatibility and updated internal components.
- Rebuilt engines come with a 12-month unlimited mileage warranty.
Question 2What 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.
- Unusual turbo lag or excessive black smoke can indicate secondary damage from EGR or DPF issues.
- A countdown to "engine will not start" is a critical AdBlue system warning.
Question 3Is 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+.
- A £5,500-£8,500 rebuilt engine investment protects a high-value asset and restores factory performance.
- Rebuilt AJ300D engines include engineering fixes not present in the original unit.
Question 4How 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.
- This includes full engine swap, MHEV system recalibration, and thorough road testing.
- Supply-only orders can be dispatched nationwide within 24-48 hours of quote acceptance.
Question 5Does 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.
- The belt-integrated starter generator (BiSG) and associated wiring remain untouched during replacement.
- Calibration files are preserved or reloaded to ensure seamless hybrid operation.
Why Choose UsCompare Range Rover Sport D300Engine PricesToday
100+ Range Rover Sport D300 engines supplied through our network
12-Month Warranty on every rebuilt Range Rover Sport D300 engine
Nationwide UK delivery
supply & fit available for your L461 Range Rover Sport
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