Range Rover Sport 3.0 SC Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Range Rover Sport 3.0 SC engine specialists. Compare prices on reconditioned, rebuilt and used engines to ensure a reliable and cost-effective replacement for your premium performance SUV.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £6,000 to £9,500 [EM-QUOTE]
Used from £2,500 · Reconditioned from £4,500 · Common codes: AJ126
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 3.0 SC specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Range Rover Sport 3.0 SC Replacement Engineto Finding the Best Range Rover Sport 3.0 SC Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryRange Rover Sport 3.0 SC - Engine History & Specs at a Glance
When the 3.0 SC (badged Si6) was introduced to the L494 Range Rover Sport, it offered a compelling blend of supercharged V6 performance and everyday usability, serving as the entry-level petrol option before the transition to four-cylinder Ingenium and mild-hybrid architectures.
Variant HistoryRange Rover Sport 3.0 SC - Engine History & Specs at a Glance
When the 3.0 SC (badged Si6) was introduced to the L494 Range Rover Sport, it offered a compelling blend of supercharged V6 performance and everyday usability, serving as the entry-level petrol option before the transition to four-cylinder Ingenium and mild-hybrid architectures.
Range Rover Sport 3.0 SC
Fuel TypePetrol
Engine Size Range3.0L (2995cc)
Power Output Range340hpEngine History Timeline
AJ126 (3.0L SC) 3.0L, 340hp (Introduced as the Si6 petrol option for the L494 Range Rover Sport, featuring a roots-type supercharger for immediate throttle response).
Phased out in favour of the 2.0L Si4 (PT204) and later the 3.0L P400 MHEV to meet stricter emissions targets.
Key Specs Snapshot
Fuel TypePetrolEngine Size Range3.0L (2995cc)Power Output Range340hpYears Produced2015-2017Every engine fitted to the Range Rover Sport 3.0 SC is covered below, with UK rebuilt pricing and known failure points.
Range Rover Sport 3.0 SC Engine Codes - Specifications & Replacement CostRange Rover Sport 3.0 SC Engine Codes - Specifications & Replacement Cost
3.0L Supercharged Petrol (2015-2017)
Power Output340hpYears Fitted2015-2017
Compatible Trim Levels
- Range Rover Sport Si6
- Range Rover Sport SE Si6
- Range Rover Sport HSE Si6
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-£7,500
Rebuilt
Full teardown, upgraded internals
£6,000-£9,500
Common Failure
Water pump failure and coolant leaks from plastic crossover pipes, alongside timing chain tensioner wear and supercharger coupler degradation.
The Range Rover Sport 3.0 SC (Si6) delivers supercharged V6 performance, but its cooling system and supercharger drivetrain introduce specific wear points. The AJ126 engine dominates replacement demand for mid-2010s petrol Sports, primarily due to coolant crossover leaks and timing chain tensioner wear. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Range Rover Sport 3.0 SC AJ126 Overheats
Affected Vehicles
Range Rover Sport 3.0 SC (AJ126, 2015-2017)
Typical Failure Mileage
60,000-120,000 miles
Root Cause
The plastic coolant crossover pipes and water pump impellers degrade under high underbonnet temperatures, leading to sudden coolant loss and potential overheating if not addressed promptly.
Why It Happens
The plastic coolant crossover pipes and water pump impellers degrade under high underbonnet temperatures, leading to sudden coolant loss and potential overheating if not addressed promptly.
Dealer (parts + labour)
£1,200-£2,000
Specialist (parts + labour)
£800-£1,500
What it involves
Replace degraded plastic crossover pipes with upgraded aluminium alternatives, fit new water pump, and pressure test the system.
Suitability
Viable for isolated leaks if the engine block and internals are otherwise healthy and overheating was caught early.
1 - 2 daysDealer (parts + labour)
£8,000-£11,500
Specialist (parts + labour)
£6,000-£9,500
What it involves
Supply & fit of a fully rebuilt AJ126 with upgraded cooling components and revised crossover pipes, plus 12-month warranty.
Suitability
Recommended if overheating has already caused secondary internal damage or warped cylinder heads.
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 |
|---|---|---|---|---|---|
 Water Pump & Crossover Pipe Replacement Minor | £1,200-£2,000 | £800-£1,500 | Replace degraded plastic crossover pipes with upgraded aluminium alternatives, fit new water pump, and pressure test the system. | Viable for isolated leaks if the engine block and internals are otherwise healthy and overheating was caught early. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£11,500 | £6,000-£9,500 | Supply & fit of a fully rebuilt AJ126 with upgraded cooling components and revised crossover pipes, plus 12-month warranty. | Recommended if overheating has already caused secondary internal damage or warped cylinder heads. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Range Rover Sport 3.0 SC (2015-2017) currently holds a value of £12,000-£25,000 in the UK [THIRD-PARTY]. A £6,000-£9,500 rebuilt engine replacement sits comfortably within the vehicle's value band. Flag: Safe.
Our Recommendation
Our Recommendation
For isolated coolant leaks, specialist pipe and water pump replacement with upgraded components is highly cost-effective. However, if the engine has overheated, a rebuilt unit provides a comprehensive, warrantied reset.
Don't Let Engine Failure Write Off Your Range Rover Sport 3.0 SC
Protect your premium investment with a rebuilt engine that addresses the AJ126's known cooling and supercharger weaknesses. Every engine supplied through our network features upgraded components, comes with a minimum 12-month unlimited mileage warranty, and is available with nationwide supply and fit to get your Range Rover Sport back on the road.
Compare rebuilt AJ126 Range Rover Sport 3.0 SC engine prices
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 3.0 SC. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Range Rover Sport 3.0 SC Engine ReplacementFrequently Asked Questions
Question 1How much does a Range Rover Sport 3.0 SC engine replacement cost-
A fully rebuilt Range Rover Sport 3.0 SC AJ126 engine typically costs between £6,000 and £9,500 for supply only, with supply and fit packages ranging from £8,000 to £11,500 depending on the specialist.
- Supply-only rebuilt: £6,000-£9,500 [EM-QUOTE]
- Supply & fit: £8,000-£11,500 [ESTIMATED]
- Always ensure the quote includes a minimum 12-month warranty.
Question 2What are the signs of coolant or water pump failure in a Range Rover Sport 3.0 SC-
The AJ126 V6 is prone to plastic coolant crossover pipe degradation and water pump failure. Early warning signs include unexplained coolant loss, sweet smells from the engine bay, overheating warnings, or white smoke from the exhaust.
- Monitor the coolant reservoir for unexplained drops in level.
- Check for external leaks around the water pump and crossover pipes.
- Address overheating warnings immediately to prevent catastrophic internal damage.
Question 3Is the 3.0 SC (Si6) more reliable than the 5.0 V8-
Yes, the 3.0 SC AJ126 is generally considered more reliable than the 5.0L AJ133 V8. While both share some supercharger and cooling system characteristics, the AJ126 avoids the severe timing chain tensioner and oil consumption issues that plague the high-output 5.0L V8 at higher mileages.
- The AJ126 has fewer catastrophic bottom-end failure reports.
- Cooling system maintenance is critical for both engines.
- Rebuilt AJ126 units include upgraded preventative components.
Question 4Is it worth replacing the engine in a Range Rover Sport 3.0 SC-
Yes, investing in a rebuilt engine is financially sound. With Range Rover Sport 3.0 SC values currently ranging from £12,000 to over £25,000 depending on condition, a £6,000-£9,500 replacement is well within the vehicle's value band and preserves this premium asset.
- Premium Range Rover Sport values easily absorb rebuild costs.
- A rebuilt engine resets the mechanical lifespan with upgraded components.
- Upgraded cooling and supercharger parts prevent repeat failures.
Question 5How long does a Range Rover Sport 3.0 SC engine replacement take-
A standard supply and fit service for a Range Rover Sport 3.0 SC typically takes 3 to 5 days at a specialist workshop. The complex supercharger system and tight engine bay require meticulous removal and calibration.
- Removal and installation: 2-3 days.
- Fluid top-up, system bleeding, and ECU calibration: 1-2 days.
- Always confirm turnaround times with your chosen specialist.
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