How much does a Land Rover Defender OCTA engine replacement cost in the UK?

A reconditioned Defender OCTA engine (S68B44B) typically costs £10,000–£13,000 supply only. Fitting adds £1,200–£2,000. These are high-cost, specialist-only replacements — the OCTA's BMW-sourced V8 and 48V MHEV system require Land Rover or BMW specialist expertise.

Is the Land Rover Defender OCTA V8 reliable?

The S68B44B is BMW's latest-generation 4.4L twin-turbo V8, shared with the Range Rover Sport SV. It has proven robust in BMW M models, but the Defender OCTA is a low-volume, high-performance variant launched in 2024. Early data suggests strong reliability, though long-term owner experience is still emerging. The 48V mild-hybrid system adds complexity — maintain strictly to manufacturer schedules.

What are the common problems with the Defender OCTA?

48V mild-hybrid system issues (battery/module faults), cooling system stress on the high-output V8, and high-performance brake and drivetrain wear due to the vehicle's 2.5-tonne weight and 635PS output. The OCTA's 0–60mph time of 3.8 seconds puts immense stress on every component.

Is it worth replacing a Defender OCTA engine, or should I scrap the car?

The OCTA starts from £145,300 — a £10,000–£13,000 engine replacement is 7–9% of the vehicle's value. This is almost always worth it for a well-maintained example. Our 60% Land Rover scrap threshold would only apply if the vehicle is heavily damaged or very high mileage — unlikely on a 2024+ model.

How do I find my Land Rover Defender OCTA engine code?

The OCTA uses a single engine code: S68B44B — BMW's 4.4-litre twin-turbo V8 with 48V mild-hybrid. This is shared with the Range Rover Sport SV. The code is stamped on the engine block; your VIN and vehicle documentation will also confirm the specification.

Can I repair the 48V MHEV system, or does it need replacement?

Yes — if diagnosed early. Battery module replacement (£800–£2,500) is the most common repair. The DC-DC converter and control modules can also fail. The system is well-understood from BMW applications, but requires specialist diagnostic equipment. At the first sign of 48V warnings, book an inspection immediately — ignoring warnings can lead to more expensive control module failures.

Land Rover Defender OCTA2024–present4.4L Twin-Turbo V8 MHEV

Land Rover Defender OCTA Engine Replacement — Compare Prices & Get Quotes

Name: Land Rover Defender OCTA UK Engine Enquiry Data 2025
Creator: LandRoverEngine.uk

Get quotes today from trusted UK Land Rover V8 specialists. The most powerful Defender ever made — 635PS 4.4-litre twin-turbo mild-hybrid V8. Compare reconditioned, rebuilt and used S68B44B engines — supply & fit available nationwide.

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12-Month Warranty

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Supply & Fit Available

12-Month Warranty

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Defender OCTA Engines — from £8,000 to £14,000Code: S68B44B BMW-sourced V8

Defender OCTA Engines — from £8,000 to £14,000· Code: S68B44B BMW-sourced V8

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

Land Rover Defender OCTA — Which Engine Does Your Car Actually Have?

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

BMW M-division twin-turbo V8 with 48V mild-hybrid — 635PS, 750Nm

GenerationYearsEngine CodeReliabilityRecon CostEra Note

L663 Defender OCTA BMW 320d L663 Defender OCTA

2024–presentS68B44B (BMW-sourced 4.4L V8 MHEV)★★★★☆ [NEWLY ASSIGNED — see Data Note]£8,000–£14,000 [PLACEHOLDER — confirm vs cost sheet]BMW M-division twin-turbo V8 with 48V mild-hybrid — 635PS, 750Nm

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Land Rover Defender OCTA Engine Replacement Costs

Supply Only£10,000–£13,000

Fitted (Indie)£11,200–£14,500

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£8,000–£10,000£9,000–£11,2001–6 monthsBudget priority; lower-mileage donor

Reconditioned Engine£10,000–£13,000£11,200–£14,50012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£12,000–£14,000£13,200–£15,50012–24 monthsLong-term ownership; 5+ year horizon

Main Dealer New£18,000–£22,000£20,000–£25,00024–36 monthsInsurance jobs, warranty claims

Figures above reflect the current S68B44B generation — the OCTA is a single-generation model from 2024 onward. All pricing is indicative; actual costs vary by mileage, condition and workshop location.

Labour estimate: Fitting a Defender OCTA V8 engine typically takes 14–18 hours at £80–£120/hr (independent Land Rover specialist) or £140–£190/hr (London/SE dealer).

→ Compare Defender OCTA engine prices from UK specialists

Common Problems

1. 48V Mild-Hybrid System Issues

2. Cooling System Stress (High-Performance V8)

3. High-Performance Brake & Drivetrain Wear

Weighing Your Options?

Compare Specialist Quotes When You're Ready

12 vetted Land Rover specialists, covering the new S68 V8 OCTA, with a 12-month warranty as standard.

See Defender OCTA Engine Options

Defender OCTA — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Defender OCTA — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes Sense48V MHEV battery/module failure✅ Yes£800–£2,500Vehicle under warranty or high-value — always worth fixingCoolant system leaks (pipes, pump)✅ Yes£500–£1,500Straightforward repair on an otherwise healthy engineTurbocharger failure (twin-turbo)✅ Yes£2,000–£4,000Viable on a vehicle worth £80,000+Timing chain/guide wear (S68)⚠️ Sometimes£2,500–£5,000Long-term ownership; BMW S-engine timing chains are robust but labour-intensiveMajor internal failure (crank/block)❌ Usually NoEngine replacement requiredReplacement often £10,000–£14,000 — assess vehicle value carefully

Buying This Defender OCTA? Check These First

Buy If

Full Land Rover service history with BMW MHEV-specific maintenance logged
Low mileage (under 20,000) with documented running-in procedure followed
48V system health check completed by a Land Rover specialist
OCTA Mode and 6D Dynamics suspension function tested

Avoid If

Any 48V electrical warnings present without a documented fix
Evidence of coolant loss or overheating (cooling system stress)
Poor service history — this engine demands precise oil specification
High mileage without documented major service (brakes, transmission, diff)

Closing Verdict

The Defender OCTA is a landmark vehicle — the most powerful Defender ever built — but it's also a complex piece of engineering. The BMW-sourced S68 V8 is a proven unit, but its 48V MHEV system and the vehicle's 2.5-tonne weight place unusual stress on every component. Buy on documented history; maintain religiously; and accept that running costs are commensurate with a £145,000+ vehicle.

Don't guess.Get the right engine at the right price.

→ Compare Defender OCTA engine prices before you buy

Don't Guess. Compare.

Get real quotes from vetted UK specialists and make the right call for your 320d.

→ Compare Defender OCTA engine prices before you buy

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Buying Checklist

Before you buy a used Land Rover Defender OCTA (or before you commit to an engine replacement), check these:

Cold Start — Listen for any rattle on startup; the S68 should fire instantly with a distinctive V8 bark

Service History — Including BMW S68-specific oil specification (LL-04 or later) and MHEV battery health checks

48V System Check — Any warnings on the dash; battery health; start-stop function working correctly

Coolant Level — Check for any loss; the cooling system works hard in this high-performance V8

Turbo Response — Test acceleration; any hesitation, lag, or whistling indicates turbo or wastegate issues

Oil Consumption — Monitor between services; S68 engines are generally robust but can consume oil in hard use

Brake & Drivetrain — Check for judder, clunks, or whine — the OCTA's weight and power stress these components

MOT History — Check for emissions-related failures (MHEV systems can trigger warnings)

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Engine Codes

This table's rows match Section 1B's Era Map exactly.

S68B44B (BMW-sourced 4.4L V8 MHEV)

Years2024–present

Power635 PS / 467 kW / 626 bhp

2025 Enquiries— (pattern data — low-volume halo)

Avg. Recon Cost£10,000–£13,000 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

S68B44B (BMW-sourced 4.4L V8 MHEV)2024–present635 PS / 467 kW / 626 bhp— (pattern data — low-volume halo)£10,000–£13,000 [PLACEHOLDER]

Technical Specs

S68B44B

Displacement4,395 cc

CylindersV8, 32-valve DOHC with VVT

Compression Ratio10.5:1 [VERIFY]

Fuel SystemDirect injection

TurbochargerTwin-turbo (parallel) with 48V mild-hybrid

Additional specifications

Maximum torque750 Nm @ 1,800–5,855 rpm

0–60mph3.8 seconds

Top speed155 mph

Transmission8-speed automatic (ZF 8HP80XMH)

Kerb weight2,510 kg (DIN)

→ Compare Defender OCTA engine prices for your Land Rover

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Market Intelligence

Most Common Failure

V mild-hybrid system issues — early reports suggest battery/module sensitivity

[PATTERN DATA — early adopter reports]

Average Enquiry Mileage

15,000

miles (new model — limited data)

[PATTERN DATA]

Average Replacement Cost

£11,000

reconditioned, supply only

[PLACEHOLDER — confirm vs cost sheet]

Most Requested Engine Code

S68B44B

[PATTERN DATA — single engine option]

Peak Enquiry Season

Spring/Summer — high-performance SUV buyers preparing for off-road adventures

[PATTERN DATA]

Regional Demand

South East30%

London25%

South West15%

PATTERN DATA — premium SUV demographic

Regional Demand Breakdown

30%South East

25%London

FAQ

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty — always confirm terms with your chosen supplier.

Why UK Land Rover Defender OCTA Owners Trust LandRoverEngine.uk

Trusted Defender OCTA Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real Defender owners, as part of the Engine Finders network, with specialist knowledge of the BMW‑sourced S68 V8 and its 48V mild‑hybrid system.
Compare Defender OCTA Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit, with transparent pricing for the new 635PS S68B44B V8.
UK Engine Replacement Services for Defender OCTA
supply‑only or full supply & fit available nationwide, covering the OCTA’s unique powertrain with specialists who understand high‑performance Land Rover V8s.

Find the best Land Rover Defender OCTA engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get your flagship back on the road with confidence.

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No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available