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Land Rover 306PS Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 3.0-litre supercharged V6 petrol engine (Ingenium architecture) fitted to the Land Rover Range Rover and Range Rover Sport. Reconditioned Land Rover 306PS units start from £4,500 , backed by 80 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,500
Reconditioned from
£4,500
Rebuilt from
£6,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Land Rover 306PS - Specifications at a Glance
Engine Code
306PS
Fuel
Petrol
Configuration
3.0L V6, DOHC, 24-valve, supercharged (Ingenium architecture)
Power Output(s)
340-380 hp (depending on tune, e.g., P380)
Years Produced
2014-2020
UK Models Fitted
2 Land Rover models - full list in Compatibility below
2025 UK Replacement Requests
80
Replaced
AJ126 (Jaguar-sourced 3.0L SC)
Replaced By
N/A (Current flagship Ingenium V6)
Most Common Failure
Cooling system leaks and occasional oil cooler issues
Reconditioned Price Range
£4,500-£7,500 supply-only
Vetted UK specialists for 306PS replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Land Rover Models Use the 306PS-
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Land Rover Range Rover | L405 | P380, HSE, Autobiography | 2014-2020 | |
| Land Rover Range Rover Sport | L494 | P380, HSE, Dynamic | 2014-2020 |
02
Land Rover Range Rover Sport
CROSS-BRAND
306PS is documented across 2 BMW applications spanning Range Rover, Range Rover Sport. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Land Rover 306PS Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,500-£4,500 | £3,280-£5,540 | 3-6 months |
Reconditioned | £4,500-£7,500 | £5,280-£8,540 | 12-24 months |
Rebuilt | £6,500-£10,000 | £7,280-£11,040 | 12-24 months |
The final Land Rover 306PS engine cost depends heavily on the condition of the cooling system and the supercharger assembly. Sourcing a reconditioned unit that includes a refurbished water pump, updated coolant crossover pipes, and a verified oil cooler provides the best long-term value. For a detailed breakdown of what influences these figures across different conditions, see our full reconditioned engine cost guide.
Labour Guide
Fitting a Land Rover 306PS engine typically takes 12-16 hours at £65-£85/hr (independent specialist) due to the tight engine bay packaging of the L405 and L494 chassis, and the complexity of the supercharger and cooling ancillaries .
Price Factors
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Common Problems
Land Rover 306PS Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 306PS, based on real-world data and verified failure patterns.
Verified issue focus: Cooling system leaks and occasional oil cooler issues.
1. Cooling System Leaks (Water Pump & Crossover Pipes)
1. Cooling System Leaks (Water Pump & Crossover Pipes)
Typical onset:
60,000-100,000 miles
What happens:
The 306PS utilizes several plastic and composite cooling components, including the water pump housing and coolant crossover pipes. Over time, heat cycling causes these materials to degrade, leading to slow coolant loss, sweet-smelling steam from the engine bay, and potential overheating if ignored.
Repair vs replace:
Replacing the water pump and crossover pipes is a standard preventative repair. However, if the leak has been ignored and the engine has overheated, cylinder head warpage may occur, necessitating a full Land Rover 306PS engine replacement.
Read more about this issue
2. Oil Cooler Issues & Particulate Filter Regeneration
2. Oil Cooler Issues & Particulate Filter Regeneration
Typical onset:
100,000-180,000 miles
What happens:
Occasional oil cooler seal degradation can lead to internal or external leaks. Additionally, on L405 hosts, oil dilution can occur as a byproduct of frequent, incomplete particulate filter (GPF/DPF) regeneration cycles, particularly in vehicles subjected to short, urban journeys.
Repair vs replace:
Replacing the oil cooler is a straightforward repair if caught early. To mitigate oil dilution, owners are advised to ensure regular sustained high-speed driving to allow regeneration cycles to complete, or to adhere to strict, shortened oil change intervals.
Read more about this issue
The 306PS is generally considered a robust and reliable unit within the modern Land Rover lineup. Its failure rate is notably lower than older supercharged variants, provided the cooling system is monitored and full JLR service history is maintained .
Compare rebuilt 306PS prices with the failure already addressed
Engine Variants
How to Confirm You Have the 306PS
As a Specific page type with no distinct sub-codes listed in the inventory, this section focuses on accurate identification and avoiding common, costly misidentifications. The 306PS engine code is stamped on a machined pad on the cylinder block and is also recorded on your vehicle’s V5C registration document under "Engine Number". Owners frequently confuse the 306PS with its predecessor, the AJ126, or the diesel variant, the 306DT. While the AJ126 is also a 3.0-litre supercharged V6, it is a Jaguar-sourced architecture with different mounting points, engine management calibration, and cooling system layouts. The 306DT is a twin-turbo diesel V6 with an entirely different internal architecture and emissions system. Fitting an AJ126 or 306DT wiring harness, ECU, or ancillary components to a 306PS host will result in a non-running vehicle and significant wasted expenditure.
Not sure which engine your car has- Enter your registration above - we'll confirm your exact 306PS fitment before any quotes are sent.
Easily Confused
AJ126
The - the Jaguar-sourced 3.0-litre supercharged V6 that the 306PS replaced in Land Rover's lineup, offering similar power outputs but with a different mounting layout and cooling system architecture.
Alternative / Next-Gen Code
AJ20P6
The (P400) - the modern mild-hybrid 3.0-litre inline-six that is gradually superseding the V6 architecture in newer Land Rover models, offering improved efficiency, electrification, and a fundamentally different internal layout.
Related JLR Variants
306DT
The - the 3.0-litre twin-turbo diesel V6 that shares the same L405 and L494 chassis applications but features a completely different internal architecture, block design, and emissions system.
Confirm the exact 306PS fitment
Not sure which engine your car has- Enter your registration above - we'll confirm your exact 306PS fitment before any quotes are sent.
Buying Guide
Buying a Replacement 306PS - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used Land Rover 306PS engine for sale can be a viable option for rolling restorations, provided the seller can confirm the cooling system has been recently serviced and there is no history of overheating or oil dilution. Without this history, you risk inheriting age-related plastic cooling component degradation. Learn more about used engines.
Reconditioned:
For most modern Land Rover owners, a reconditioned 306PS is the optimal choice. A proper recon will proactively address the engine’s known weaknesses by fitting a refurbished water pump, updated coolant crossover pipes, and a verified oil cooler, delivering near-new reliability for future high-performance driving. Explore reconditioned engine options.
Rebuilt:
A full rebuild is justified for low-mileage, high-spec L405 or L494 projects where the engine is being stripped to the bare block. This allows for line-boring the main bearings, balancing the rotating assembly, and ensuring the engine matches the pristine condition of the flagship chassis. View rebuilt engine services.
Supply & Fit Line:
Sourcing and fitting your replacement through our vetted network ensures the work is completed by specialists familiar with modern Land Rover wiring and supercharger systems, backed by a nationwide warranty. Check supply and fit availability.
Vehicle Value Note:
Modern Range Rover L405 and Range Rover Sport L494 models typically hold values between £30,000 and £80,000, depending on mileage, specification, and condition . Because a fully reconditioned Land Rover 306PS engine replacement is well within this value band, replacement is generally a financially sound decision, provided the vehicle's overall body condition and service history are sound.
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Related Engines
Engines Related to the Land Rover 306PS
Explore engines that are closely related to the Land Rover 306PS, including its predecessor, successor, and key family variants.
Predecessor
AJ126
The - the Jaguar-sourced 3.0-litre supercharged V6 that the 306PS replaced in Land Rover's lineup, offering similar power outputs but with a different mounting layout and cooling system architecture.
Successor
AJ20P6
The (P400) - the modern mild-hybrid 3.0-litre inline-six that is gradually superseding the V6 architecture in newer Land Rover models, offering improved efficiency, electrification, and a fundamentally different internal layout.
Sibling
306DT
The - the 3.0-litre twin-turbo diesel V6 that shares the same L405 and L494 chassis applications but features a completely different internal architecture, block design, and emissions system.
FAQ
Land Rover 306PSFrequently Asked Questions
Question 1How much does a Land Rover 306PS engine replacement cost-
A reconditioned Land Rover 306PS engine typically costs between £4,500 and £7,500 for supply only, with fitted prices ranging from £5,280 to £8,540. Used units start around £2,500 but carry a higher risk of inherited cooling system degradation. Full rebuilt units for high-spec applications can exceed £10,000. Labour typically adds 12-16 hours at £65-£85/hr for an independent specialist.
- Used units start around £2,500 but carry a higher risk of inherited cooling system degradation.
- Full rebuilt units for high-spec applications can exceed £10,000.
- Labour typically adds 12-16 hours at £65-£85/hr for an independent specialist.
Question 2What is the most common failure on the Land Rover 306PS engine-
The most documented failures on the 306PS relate to the cooling system, specifically water pump housing and plastic coolant crossover pipe degradation. Over time, heat cycling causes these components to crack, leading to slow coolant loss and potential overheating. Occasional oil cooler seal issues and oil dilution from incomplete particulate filter regeneration cycles are also noted on higher-mileage examples.
- Over time, heat cycling causes these components to crack, leading to slow coolant loss and potential overheating.
- Occasional oil cooler seal issues and oil dilution from incomplete particulate filter regeneration cycles are also noted on higher-mileage examples.
Question 3Which Land Rover models use the 306PS engine-
The 306PS engine was fitted to the Land Rover Range Rover (L405) and Range Rover Sport (L494) between 2014 and 2020. It served as the premium supercharged petrol option, often badged as P380. It replaced the older Jaguar-sourced AJ126 architecture. It was designed to offer refined power delivery and seamless integration with modern vehicle electronics.
- It served as the premium supercharged petrol option, often badged as P380.
- It replaced the older Jaguar-sourced AJ126 architecture.
- It was designed to offer refined power delivery and seamless integration with modern vehicle electronics.
Question 4Should I buy a used or reconditioned 306PS engine-
For a modern Land Rover, a reconditioned 306PS is strongly recommended over a used unit. Used engines frequently inherit the same age-related plastic cooling component degradation that prompted the original removal. A proper reconditioned build proactively replaces the water pump, updates the coolant crossover pipes, and verifies the oil cooler integrity. Reconditioned units also include comprehensive compression and pressure testing to guarantee reliability.
- Used engines frequently inherit the same age-related plastic cooling component degradation that prompted the original removal.
- A proper reconditioned build proactively replaces the water pump, updates the coolant crossover pipes, and verifies the oil cooler integrity.
- Reconditioned units also include comprehensive compression and pressure testing to guarantee reliability.
Question 5How do I know if my car has the 306PS engine-
You can confirm your engine code by checking the V5C registration document under the "Engine Number" field or by locating the code stamped on the cylinder block. The 306PS is a 3.0-litre supercharged V6, easily distinguished from the diesel 306DT by its supercharger assembly and lack of diesel emissions equipment. It is also distinct from the older AJ126, which features different mounting points and engine management calibration. Fitting an AJ126 or 306DT wiring harness to a 306PS host will result in a non-running vehicle.
- The 306PS is a 3.0-litre supercharged V6, easily distinguished from the diesel 306DT by its supercharger assembly and lack of diesel emissions equipment.
- It is also distinct from the older AJ126, which features different mounting points and engine management calibration.
- Fitting an AJ126 or 306DT wiring harness to a 306PS host will result in a non-running vehicle.
Compare Land Rover 306PS Engine Prices Today
Get a free, no-obligation comparison of replacement options specific to your exact Range Rover or Range Rover Sport. Our registration lookup confirms your 306PS fitment and tune before any quotes are sent, ensuring you only pay for compatible parts. With reconditioned 306PS units starting from £4,500, comparing takes two minutes and could save you thousands on your Land Rover repair.
Vetted UK Specialists
Vetted UK specialists for 306PS replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
Expert Support
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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