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Range Rover Mk4 L405 Engine Replacement - Rebuilt & Reconditioned Units from £3,000

Source genuine OE-spec engines from vetted UK specialists. Every unit tested to Range Rover OEM standards with 12m unlimited mileage warranty. Compare quotes & save up to 60% online.

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Engine Finders

Range Rover Mk4 (L405) Engine Specialists

Expert Solutions for Every Mk4 - TDV6 to SVR

Need a reliable replacement engine for your Range Rover Mk4 (L405)?
Facing issues like oil leaks or throttle body failures? Engine Finders is the UK's #1 marketplace for high-quality Range Rover engines.

Find Your Perfect Range Rover Mk4 (L405) Engine Today!
Range Rover Mk4 (L405) Engine replacement specialists | Engine Finders

Range Rover Mk4 (L405) Replacement Engine Options - UK Supply

All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for L405.

Range Rover Mk4 (L405) Rebuilt Engines

High-performance rebuilds using OEM parts, addressing oil leaks and timing chain issues.

Range Rover Mk4 (L405) Remanufactured Engines

Fully stripped and rebuilt to factory specs, resolving EGR valve and turbo problems.

Range Rover Mk4 (L405) Reconditioned Engines

Thoroughly inspected and restored units, ideal for fixing throttle body failures.

Range Rover Mk4 (L405) Replacement Engines

Direct swap engines for minimal downtime, tackling loud engine knocking sounds.

Range Rover Mk4 (L405) Refurbished Engines

Cleaned, tested, and performance-tuned units, resolving supercharger wear issues.

Range Rover Mk4 (L405) Used Engines

Affordable options with verified mileage and history, checked for common problems.

Range Rover Mk4 (L405) Compatible Engine Codes - Average Prices on Rebuilt Units (UK Supply)

All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.

Where to buy Range Rover Mk4 (L405) Engine replacement engine | Engine Finders

Why Choose Engine Finders for Your Range Rover Mk4 (L405) Engine?

Facing a failing Range Rover Mk4 (L405) engine? Whether it's catastrophic crankshaft failure on the 3.0 SDV6, timing chain disasters on the 5.0 V8 SC, or persistent oil consumption across the lineup, Engine Finders understands the specific, often severe, engine issues plaguing your L405. We source and supply replacement engines engineered to overcome these well-documented problems.

  • ✔ Combat 3.0 SDV6 Crankshaft Failures

    We offer upgraded replacement engines specifically addressing the Gen 1.5 3.0 SDV6 crankshaft breakage issue, a known cause of complete engine lockup.

  • ✔ Prevent 5.0 V8 SC Timing Chain Catastrophe

    Our L405 5.0 V8 SC engines come with updated timing components or are remanufactured to prevent the common timing chain failures that can destroy the engine.

  • ✔ Solve Persistent Oil Consumption Issues

    Our replacement engines are designed to eliminate excessive oil use, addressing breather leaks and internal wear common in high-mileage L405 engines.

  • ✔ Ensure TDV8 Turbo & DPF Reliability

    We provide TDV8 engines with upgraded turbo oil drain systems and cleaned/removed DPF units to prevent costly future failures and maintenance.

  • ✔ Guarantee Direct Bolt-On Compatibility

    Our engines are matched precisely to your L405's model year and variant, ensuring correct wiring harness, sensor, and ECU compatibility [[14]].

  • ✔ Back with Expert Support & Warranty

    We provide technical support and comprehensive warranties, giving you confidence that your Mk4 Range Rover engine replacement is done right.

Rated 4.9 out of 5 by 997 satisfied customers who chose reconditioned and used Land Rover engines through Engine Finders.

Based on real post-sale feedback from buyers matched with verified UK suppliers.

4.9/5
"Saved £1300 on my Land Rover engine, quickest quotes ever!" - Sam, Warrington
"Defender 110 engine swap sorted in days, proper reliable service." - Alex, Huddersfield
"Land Rover wanted £7.8k, Engine Finders saved me £1900, brilliant!" - Muhammad, Rochdale
"Best diesel engine fix for my Defender 110, no hassle at all." - Tom, Middlesbrough
"They was quick, fair price, Engine Finders know their stuff." - Priya, Dudley
Get Your Custom Land Rover Quote Today

Range Rover Mk4 (L405) Engines for Sale | Engine Finders

Facing catastrophic engine failure in your Range Rover Mk4 (L405)? Engine Finders connects you with the best deals on high-quality replacement engines, specifically sourced to address the known issues of your L405's powertrain.

Range Rover Mk4 (L405) Engine Replacement Engines

The Range Rover Mk4 (L405) was produced from 2012 to 2022 [[14]]. This generation marked a significant shift to an all-aluminium monocoque structure [[15]]. It utilized a diverse range of engines, including naturally aspirated V8s, supercharged V8s, and advanced diesel engines like the 3.0 SDV6 and 4.4 TDV8 [[6]]. Common failure points vary by engine code but often include oil leaks [[22]], timing chain issues (particularly in early V8 models), supercharger wear in supercharged variants [[25]], and specific component failures like the 3.0 Diesel throttle body [[20]].

Range Rover Mk4 (L405) Engine Models & Engines Codes

The Mk4 L405 utilized several engine codes across its production run. Understanding your specific code is crucial for finding the correct replacement.

  • SC 5.0L V8 (AJ133): Supercharged petrol engine. Common issues include supercharger wear and oil leaks [[25]]. Found in various L405 models from 2012.
  • NAT 5.0L V8 (AJ135): Naturally aspirated petrol V8. Generally robust but can suffer oil leaks [[23]]. Found in L405 models.
  • SDV6 3.0L V6 (AJD300/SC): Turbo diesel engine. Known for potential crankshaft failures (especially Gen 1.5) and oil leaks [[22]]. Found in L405 diesel models.
  • TDV6 3.0L V6 (AJD300): Older turbo diesel V6. Prone to turbocharger and EGR issues. Found in earlier L405 diesels.
  • TDV8 4.4L V8 (AJD440): Powerful turbo diesel V8. Issues can include DPF clogging, turbo problems, and oil leaks [[22]]. Found in L405 diesel models.
  • P380 3.0L I6 (AJ200): Mild Hybrid petrol engine. Later addition. General reliability is good. Found in L405 PHEV and mild hybrid models.
  • P400 3.0L I6 (AJ200): Plug-in Hybrid petrol engine. Electric system adds complexity. Found in L405 PHEV models.
  • P530 4.4L V8 (AJ160): High-performance supercharged V8. Shares supercharger wear issues [[25]]. Found in SVR and high-performance variants.

Identifying your engine code, often found on a plate near the engine [[9]], is essential for selecting the correct replacement.

Buy Used and Second-Hand Range Rover Mk4 (L405) Engines

Replacement options for your Mk4 (L405) Engine vary based on your needs and budget.

  • Used/Low-Mileage Engines: Recently removed engines from low-mileage donor vehicles, offering potential savings.
  • Reconditioned Engines: Used engines stripped down, cleaned, and fitted with new wear items like gaskets, seals, and timing components.
  • Rebuilt Engines: Engines rebuilt to original specifications using a mix of new, reconditioned, and used parts.
  • Remanufactured Engines: Engines professionally restored to meet or exceed original factory specifications using new or reconditioned parts.

Engine Finders ensures all engines listed meet strict quality standards, regardless of type, providing confidence in your Mk4 (L405) Engine replacement.

Range Rover Mk4 (L405) Engines in Stock

Our reconditioned Mk4 (L405) Engines undergo comprehensive rebuilding processes to address common failure points.

  • New gaskets, seals, and timing components (e.g., chains, tensioners).
  • Cleaning and inspection of the engine block and heads.
  • Replacement of wear items like piston rings, bearings, and oil pumps where necessary.
  • Refurbishment or replacement of ancillaries like the water pump and thermostat.
  • Specific upgrades for known issues, like modified crankshafts for problematic SDV6 variants.

Each engine is rigorously tested for compression, oil pressure, and correct operation before being offered for sale, ensuring reliable performance.

Warranty for Replacement Range Rover Mk4 (L405) Engines

We understand the importance of peace of mind with a major investment like a replacement engine.

  • Standard warranties typically cover 12 months or 12,000 miles for reconditioned/rebuilt engines.
  • Remanufactured engines often come with extended warranties, sometimes up to 2-3 years.
  • Certain components or specific engine codes might have different warranty terms.

Engine Finders is a price comparison website. Warranty terms are set by the supplying engine dealer and are subject to their terms and conditions. Please verify warranty details directly with the seller before purchase.

Where to buy Range Rover Mk4 (L405) Engine replacement engine | Engine Finders

Expert Tips for Choosing the Right Engine for Your Range Rover Mk4 (L405) Engine

♻️ Range Rover Mk4 (L405) Engine Types Explained

  • Used engines are low-mileage units from recent donor vehicles
  • Reconditioned engines have new wear items like gaskets and seals
  • Rebuilt engines follow OEM specs with mix of new and used parts
  • Remanufactured engines get new components and full testing

£ Range Rover Mk4 (L405) Engine Replacement Engine Cost in the UK

  • Used engines start from £2,500-£4,000 depending on mileage
  • Reconditioned engines range from £4,500-£7,000 for most variants
  • Remanufactured engines cost £6,500-£9,500 with full warranty
  • Engine Finders saves customers up to 40% vs main dealer prices

🔍 Finding the Right Range Rover Mk4 (L405) Engine

  • Check your engine code on plate near engine bay or VDS data
  • Match exact engine code like AJ133 for 5.0 SC V8 models
  • Verify production year compatibility for generation-specific parts
  • Confirm ECU and wiring harness compatibility before purchase

⛽ Range Rover Mk4 (L405) Engine Petrol vs Diesel Engines

  • Petrol engines offer smoother power delivery and lower maintenance
  • Diesel engines provide better torque and fuel economy for towing
  • SDV6 diesels have known crankshaft issues requiring careful selection
  • Supercharged petrol engines need regular supercharger maintenance

🔒 Quality Assurance & Warranty

  • Look for engines with new timing chains and tensioners installed
  • Verify oil pump and ancillaries have been replaced or serviced
  • Standard warranty is 12 months, extended for remanufactured units
  • Engine Finders verifies all suppliers meet strict quality standards

🛒 Compare & Save on Range Rover Mk4 (L405) Engines

  • Get multiple quotes to compare prices and warranty terms
  • Check if included parts like ECU and sensors match your car
  • Ask about return policies if engine has major problems
  • Engine Finders gets you quotes from 3-5 suppliers in 48 hours

Range Rover Mk4 (L405) Engine Works: How Experts Rebuild Engines

When your engine fails, Range Rover Mk4 (L405) Engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.

1. Complete Disassembly & Inspection: Experts strip the engine completely, inspecting every component for wear or damage. Critical checks include crankshaft straightness, cylinder bore condition, and connecting rod alignment specific to L405 engine blocks.

2. Block & Head Refurbishment: The engine block and cylinder heads are professionally cleaned and magnafluxed for cracks. Boring and honing of cylinders is done to precise tolerances, ensuring proper piston ring seal and oil control for long engine life.

3. Critical Component Replacement: All wear items are replaced including piston rings, main and rod bearings, oil pump, timing chains, guides and tensioners. For SDV6 engines, special attention is given to crankshaft modifications if required.

4. Precision Assembly: Reassembly follows strict torque specifications using calibrated tools. Head bolts are torqued in sequence, timing components are set precisely, and all gaskets are new. Supercharged engines require special procedures for VAGCOM coding.

5. Rigorous Testing: Engines undergo comprehensive testing including compression checks, oil pressure tests, and leak tests. Dynamometer testing ensures correct power output and smooth operation before shipping to confirm rebuild quality.

6. Final Quality Control: Final inspection includes checking all external components, verifying correct engine number matching, and ensuring all ancillaries function properly. Engines are run-in tested and filled with high-quality oil before dispatch.

Get Your Range Rover Mk4 (L405) Engine Quote

Frequently Asked Questions - Range Rover Mk4 (L405) Engines

What are the most common Range Rover Mk4 (L405) Engine problems?

Key issues vary by engine code:
• SDV6 (AJD300): Crankshaft failures (Gen 1.5), oil leaks
• 5.0 V8 SC (AJ133): Supercharger wear, timing chain issues
• TDV8 (AJD440): DPF clogging, turbocharger problems
• P380/P400 (AJ200): Hybrid system complexity, throttle body issues
• Regular oil consumption and EGR valve clogging are widespread.

How much does a Range Rover Mk4 (L405) Engine replacement cost UK?

Pricing depends on engine type and variant:
• Used Engines: £2,500-£4,000 (low mileage units)
• Reconditioned: £4,500-£7,000 (new wear items)
• Remanufactured: £6,500-£9,500 (full warranty)
• Engine Finders offers savings up to 40% vs main dealer prices.

How do I find my Range Rover Mk4 (L405) Engine code?

Locate the engine code easily:
• Check the engine identification plate in the engine bay
• Look for the VIN and cross-reference with vehicle data
• Common codes: AJ133 (5.0 SC V8), AJD300 (3.0 SDV6)
• Engine Finders requires the code for exact replacement matching.

Are reconditioned Range Rover Mk4 (L405) Engines reliable?

Yes, when professionally rebuilt:
• Quality rebuilds replace critical components like chains/tensioners
• Address known issues (e.g., SDV6 crankshaft modifications)
• Include new gaskets, seals, oil pumps, and ancillaries
• Engine Finders vets suppliers for strict quality standards.

What's included in a Range Rover Mk4 (L405) Engine rebuild?

A full rebuild typically includes:
• New timing components (chain, guides, tensioners)
• Replacement of piston rings, bearings, oil pump
• Cylinder head servicing and block reconditioning
• Fresh gaskets, seals, and key ancillaries like water pump.

How long does Mk4 (L405) Engine replacement take?

Timeline from order to installation:
• Delivery: Typically 2-5 business days UK-wide
• Installation: 1-2 days by a qualified mechanic
• Engine Finders ensures fast dispatch for urgent needs
• Having the engine code ready speeds up the sourcing process.

Which is better: Used or Reconditioned Mk4 (L405) Engine?

Choice depends on your risk tolerance:
• Used Engines: Lower cost, unknown history, potential wear
• Reconditioned: Higher cost, known rebuild quality, warranty
• For problematic codes like early SDV6, choose reconditioned/upgraded
• Engine Finders helps compare options based on your specific code.

Do Range Rover Mk4 (L405) Engines have timing chain problems?

It depends on the specific engine variant:
• 5.0 V8 SC (AJ133): Known for timing chain issues
• 3.0 SDV6 (AJD300): Less common, but possible
• Remedies: Updated tensioners and guides during rebuild
• Engine Finders supplies engines with these updates fitted.

Can I get a warranty on a replacement Mk4 (L405) Engine?

Yes, warranties vary by engine type:
• Reconditioned/Rebuilt: Standard 12 months typically
• Remanufactured: Often 2-3 years or longer
• Coverage includes parts and usually labour for defects
• Engine Finders ensures all listed engines meet warranty standards.

Why choose Engine Finders for Mk4 (L405) Engine replacement?

Engine Finders offers key advantages:
• Multiple quotes from vetted UK engine suppliers
• Up to 40% savings compared to main dealers
• Ensures correct engine code matching and compatibility
• Handles the search, letting you compare price and warranty easily.