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Land Rover 30DDTX Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 3.0-litre inline-6 diesel fitted to the Discovery 5 and Range Rover Sport from 2016 to 2020. Reconditioned units are available from approximately £6,500 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£3,500
Reconditioned from
£6,500
Rebuilt from
£7,500
GB
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Key Specs
Land Rover 30DDTX - Specifications at a Glance
Engine Code
30DDTX
Fuel
Diesel
Configuration
3.0L Inline-6, turbocharged (Ingenium architecture)
Power Output(s)
255-258 hp (D250 / D300 badging)
Years Produced
2016-2020
UK Models Fitted
2 Land Rover models - full list in Compatibility below
Replaced
306DT
Replaced By
None - still in widespread use (later mild-hybrid variants)
Most Common Failure
EGR cooler leaks and AdBlue system faults
Reconditioned Price Range
£6,500-£9,500 supply-only
Vetted UK specialists for 30DDTX replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Land Rover Models Use the 30DDTX-
The 30DDTX is Land Rover's modern Ingenium 3.0-litre inline-6 diesel, introduced to replace the older V6 306DT. It offers improved refinement, better fuel economy, and a more compact packaging layout, serving as the primary diesel option for Land Rover's mid-size and large SUVs during this period.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Land Rover Discovery 5 | L462 | Discovery 5 D250, D300 | 2017-2020 | |
| Land Rover Range Rover Sport | L494 (facelift) | Range Rover Sport D250, D300, SDV6 | 2018-2020 |
02
Land Rover Range Rover Sport
Generation/Chassis
L494 (facelift)
Badge(s)
Range Rover Sport D250, D300, SDV6
Years
2018-2020
CROSS-BRAND
30DDTX is documented across 2 BMW applications spanning Land Rover Discovery 5, Land Rover Range Rover Sport. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Land Rover 30DDTX Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £3,500-£5,500 | £4,410-£6,670 | 3-6 months |
Reconditioned | £6,500-£9,500 | £7,410-£10,670 | 12-24 months |
Rebuilt | £7,500-£11,000 | £8,410-£12,170 | 12-24 months |
The final cost of a Land Rover 30DDTX engine replacement is heavily influenced by the condition of the emissions and forced-induction systems. Units rebuilt with a new or refurbished EGR cooler, updated AdBlue system components, and refreshed turbochargers command a slight premium but prevent near-term repeat failures. For a detailed breakdown of how specific component conditions affect the overall Land Rover 30DDTX engine cost, see our full reconditioned engine cost guide.
Labour Guide
Fitting a 30DDTX typically takes 14-18 hours at £65/hr (independent specialist) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
Land Rover 30DDTX Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 30DDTX, based on real-world data and verified failure patterns.
Verified issue focus: EGR cooler leaks and AdBlue system faults.
1. EGR Cooler Leaks
1. EGR Cooler Leaks
Typical onset:
60,000-100,000 miles
What happens:
The EGR cooler can develop internal or external leaks, leading to unexplained coolant loss, white smoke from the exhaust, and potential engine overheating if ignored. This is often exacerbated by carbon buildup in the intake system.
Repair vs replace:
EGR cooler replacement is a standard maintenance fix. However, if the leak has caused severe overheating, the cylinder head may be compromised, necessitating a full engine replacement. Read our full coolant system failure guide.
Read more about this issue
2. AdBlue System Faults
2. AdBlue System Faults
Typical onset:
50,000-90,000 miles
What happens:
The AdBlue heater or injector can fail, causing the diesel exhaust fluid to crystallize. This leads to "Engine Power Reduced" warnings, fault codes, and eventually a no-start condition once the countdown timer expires.
Repair vs replace:
Component replacement (heater, injector, or dosing module) is a standard repair and does not typically require a full engine replacement unless the crystallization has severely damaged the SCR catalyst or exhaust plumbing.
Read more about this issue
3. Turbocharger Wear
3. Turbocharger Wear
Typical onset:
80,000-120,000 miles
What happens:
The turbocharger wastegate can develop a rattle, or the bearings can wear over time, leading to boost leaks, reduced power, and excessive smoke.
Repair vs replace:
Turbocharger replacement or refurbishment is a standard repair and does not require a full engine replacement unless turbo debris has entered the oil system and caused bearing damage.
Read more about this issue
As a newer Ingenium design, the 30DDTX inline-6 architecture avoids the catastrophic crankshaft bearing failures that plagued the older 306DT V6, making it a significantly more robust and reliable platform overall .
Compare rebuilt 30DDTX prices with the failure already addressed
Engine Variants
How to Confirm You Have the 30DDTX
The 30DDTX is Land Rover's specific designation for the modern 3.0-litre Ingenium inline-6 diesel. Confirming your exact code is critical because, while it shares a displacement with older Land Rover diesels, the physical architecture and engine management are entirely different. WHERE TO FIND THE CODE: The engine code is stamped on a machined pad on the engine block, typically visible near the bellhousing or on the cylinder head cover. It will also be explicitly listed on your V5C registration document under "Engine Code" or "Engine Capacity", and can be decoded directly from your 17-character VIN. COMMONLY CONFUSED CODES: - 306DT: The older 3.0L V6 diesel. Externally distinct (V6 vs Inline-6), with entirely different mounting points, ECU, and a known history of catastrophic crankshaft bearing failures. - 306D1: Another variant of the older 3.0L V6 architecture, sharing the same fundamental layout and failure risks as the 306DT, and completely non-interchangeable with the inline-6 30DDTX. Why fitting the wrong revision matters: The inline-6 architecture of the 30DDTX is physically and electronically incompatible with the V6 306DT/306D1 blocks. Attempting to swap a V6 unit into an inline-6 chassis without extensive, custom fabrication and ECU remapping is not viable. CLOSING LINE: Not 100% sure- Enter your registration above - we'll confirm your exact 30DDTX fitment before any quotes are sent.
Easily Confused
306DT
- the older 3.0L V6 diesel, which suffered from well-documented catastrophic crankshaft bearing failures that the inline-6 30DDTX architecture was specifically designed to resolve.
Alternative / Next-Gen Code
448DT
- the 4.4L V8 diesel alternative fitted to the same Discovery 5 and Range Rover Sport chassis during this era, offering higher torque but with different service intervals and failure profiles.
Confirm the exact 30DDTX fitment
Buying Guide
Buying a Replacement 30DDTX - 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 30DDTX engine is only advisable if it comes with a comprehensive, documented service history proving that the AdBlue system and EGR cooler have been proactively maintained or replaced. Without this specific history, the risk of inheriting emissions-related faults is unacceptably high. Explore our vetted used Land Rover 30DDTX engine network.
Reconditioned:
A proper reconditioned Land Rover 30DDTX engine is the most balanced and recommended choice for the majority of owners. A quality, specialist-led rebuild will systematically address the known weak points: a new or refurbished EGR cooler, updated AdBlue dosing components, refreshed turbochargers, and all critical gaskets and seals. This effectively resets the engine's reliability clock and is the most cost-effective way to secure long-term peace of mind. Compare reconditioned Land Rover 30DDTX engine options.
Rebuilt:
A full rebuild is justified for high-mileage examples, vehicles that have suffered from overheating, or if the cylinder bores show measurable scoring. An upgraded rebuild should include new pistons, a reground crankshaft, and a complete refresh of the oil pump, ensuring the engine can reliably handle another 100,000+ miles of heavy-duty use. View rebuilt Land Rover 30DDTX engine specifications.
Supply & Fit Line:
Buying through the EnginesMarket network means you can opt for a full supply and fit service, with the replacement engine installed by a Land Rover specialist and backed by a nationwide warranty. Learn more about supply and fit.
Vehicle Value Note:
The Land Rover 30DDTX is typically found in host vehicles (like the Discovery 5 L462 or Range Rover Sport L494 facelift) valued between £15,000 and £45,000+, heavily dependent on condition, mileage, and specification. For these modern, high-value chassis, a £6,500+ reconditioned Land Rover 30DDTX engine replacement represents a viable investment (well under 50% of the vehicle's total current market value), making replacement financially sound compared to older, lower-value platforms.
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Related Engines
Engines Related to the Land Rover 30DDTX
Explore engines that are closely related to the Land Rover 30DDTX, including its predecessor, successor, and key family variants.
Predecessor
306DT
- the older 3.0L V6 diesel, which suffered from well-documented catastrophic crankshaft bearing failures that the inline-6 30DDTX architecture was specifically designed to resolve.
Successor
None
the 30DDTX remains the core 3.0L diesel architecture for modern Land Rovers, with later iterations simply adding mild-hybrid electrical assistance rather than a full architectural replacement.
Sibling
448DT
- the 4.4L V8 diesel alternative fitted to the same Discovery 5 and Range Rover Sport chassis during this era, offering higher torque but with different service intervals and failure profiles.
FAQ
Land Rover 30DDTXFrequently Asked Questions
Question 1How much does a Land Rover 30DDTX engine replacement cost-
A reconditioned Land Rover 30DDTX engine typically costs between £6,500 and £9,500 for supply only. Fitted costs through an independent specialist will add approximately £910-£1,170 in labour. Used units are available from £3,500 but carry a higher risk of inherited emissions system wear.
- Fitted costs through an independent specialist will add approximately £910-£1,170 in labour.
- Used units are available from £3,500 but carry a higher risk of inherited emissions system wear.
Question 2What is the most common failure with the 30DDTX-
The most common failures are EGR cooler leaks and AdBlue system faults, typically emerging between 60,000 and 100,000 miles. EGR leaks can lead to unexplained coolant loss, while AdBlue crystallization triggers 'Engine Power Reduced' warnings. Turbocharger wear is also a documented issue at higher mileages.
- EGR leaks can lead to unexplained coolant loss, while AdBlue crystallization triggers "Engine Power Reduced" warnings.
- Turbocharger wear is also a documented issue at higher mileages.
Question 3Which Land Rover models use the 30DDTX engine-
The 30DDTX was fitted to the Land Rover Discovery 5 (L462) and the facelifted Range Rover Sport (L494) between 2016 and 2020. It serves as the primary 3.0L diesel option, replacing the older V6 architecture. It offers improved refinement and better fuel economy for these heavy SUV platforms.
- It serves as the primary 3.0L diesel option, replacing the older V6 architecture.
- It offers improved refinement and better fuel economy for these heavy SUV platforms.
Question 4Should I buy a used or reconditioned 30DDTX engine-
A reconditioned Land Rover 30DDTX is strongly recommended over a used unit due to the complexity and high replacement cost of the turbo and emissions systems. A proper rebuild will systematically replace the EGR cooler, AdBlue dosing components, and turbochargers. A used unit is only advisable with comprehensive, documented proof that these specific preventative repairs have already been completed.
- A proper rebuild will systematically replace the EGR cooler, AdBlue dosing components, and turbochargers.
- A used unit is only advisable with comprehensive, documented proof that these specific preventative repairs have already been completed.
Question 5How do I know if my car has the 30DDTX engine-
The engine code is stamped on a machined pad on the engine block, typically visible near the bellhousing or on the cylinder head cover. It will also be explicitly listed on your V5C registration document under 'Engine Code' or 'Engine Capacity', or can be decoded directly from your 17-character VIN.
- It will also be explicitly listed on your V5C registration document under "Engine Code" or "Engine Capacity".
- You can also decode it directly from your 17-character VIN.
Compare Land Rover 30DDTX Engine Prices Today
Get a free, no-obligation price comparison for your exact Land Rover 30DDTX engine. Our registration lookup confirms your precise fitment before any quotes are sent, ensuring you receive accurate, compatible options. With reconditioned 30DDTX units starting from £6,500, comparing takes two minutes and could save you hundreds on your Discovery 5 or Range Rover Sport repair.
Vetted UK Specialists
Vetted UK specialists for 30DDTX replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
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