The Range Rover Sport (2014–2017) fitted with the AJ133 5.0L supercharged V8 delivers exceptional performance, but this engine is also known for certain weaknesses that can shorten its lifespan. Problems such as excessive oil consumption, timing chain tensioner wear, and supercharger seal leaks are commonly reported by UK owners, and in many cases these faults appear without much warning. Understanding the weak points of the AJ133, the signs that problems are developing, and the options available for repair or replacement is essential for anyone maintaining this engine.
Quick Facts Box
- Model Covered: Range Rover Sport (L494) 2014–2017
- Engine Code: AJ133 (5.0L Supercharged V8)
- Typical Lifespan: 70,000–100,000 miles (112,000–160,000 km) – ESTIMATE (DVSA & owner forum data)
- Common Failures: Oil starvation → spun bearings, timing chain tensioner failure, supercharger seal leaks, coolant ingress
- Replacement Cost Range: £4,500 – £10,500 (parts + labour) – ESTIMATE
- Warranty: 12-Months Unlimited Mileage Warranty on all engines via EngineFinders
- Supply & Fit: Available UK-wide – London, Leeds, Bristol, Manchester & more
AJ133 Engine Weak Points: Oil Consumption, Timing Chains & Supercharger Seals
The AJ133 5.0L supercharged V8 is a masterpiece of power, delivering 510 bhp and 625 Nm in the Range Rover Sport – but it’s plagued by three fatal flaws that UK owners know all too well.
1. Oil Consumption & Starvation
Many AJ133 engines burn 1L of oil per 1,000 miles – not inherently fatal, but if ignored, low oil leads to spun rod bearings and total bottom-end failure. Land Rover issued TSB LTB00485 (2015) acknowledging “excessive oil consumption under spirited driving conditions”, but offered no free fix.
2. Timing Chain Tensioner Failure
Plastic tensioners degrade, causing slack → skipped timing → valves meet pistons. A £1,200 repair if caught early; a £7,000+ engine replacement if ignored.
3. Supercharger Seal Leaks
Oil leaks from the nose seal contaminate belts and cause slippage or failure – often misdiagnosed as “just a leak” until the supercharger seizes.
Real-world data from Ranger Rover Experts shows 68% of AJ133 failures occur between 75,000–95,000 miles, often without warning.
EngineFinders has helped over 1,100 UK Range Rover owners replace their AJ133 engines since 2016 – with rebuilt units featuring upgraded tensioners, reinforced oil squirters, and remanufactured superchargers.
Technical Specifications: Range Rover Sport AJ133 V8 (2014–2017)
| Engine Code | AJ133 |
| Displacement | 5,000 cc (5.0L) |
| Fuel Type | Petrol (Super Unleaded recommended) |
| Cylinders / Config | 8-cylinder, 90° V, DOHC |
| Bore x Stroke | 92.5 mm x 93.0 mm |
| Compression Ratio | 9.5:1 |
| Power Output | 510 bhp (375 kW) @ 6,000–6,500 rpm |
| Torque | 625 Nm (461 lb-ft) @ 2,500–5,500 rpm |
| Forced Induction | Eaton TVS R1740 Supercharger (with intercooler) |
| Years Used | 2013–2017 (Range Rover Sport L494) |
| Timing System | Dual-row timing chains (tensioner prone to failure) |
| OEM Oil Spec | Land Rover SAE 5W-30 (STJLR.03.5003) |
| Known TSB / Recall | TSB LTB00485 (Oil Consumption), TSB LTB00512 (Timing Chain Noise) |
These OEM specifications align with UK type-approval requirements for engine performance and emissions, governed by the UK vehicle type approval standards.
The AJ133’s Achilles’ heel is its lubrication system. High-RPM supercharging demands perfect oil flow – but factory oil pump and baffle designs can’t keep up during hard cornering or track use. Combine that with plastic timing components and you’ve got a ticking time bomb.
Full UK Cost Breakdown: New, Reconditioned, Used AJ133 Engines (2014–2017)
Don’t be fooled by “cheap” used engines – many are ticking time bombs with the same flaws. Here’s what you’ll actually pay in 2024:
| New OEM Engine (Dealer) | £8,500 – £10,500 | £1,200 – £1,800 | £9,700 – £12,300 | 2 years (Land Rover) |
| Reconditioned Engine | £3,800 – £5,200 | £900 – £1,400 | £4,700 – £6,600 | 12-Months Unlimited Mileage (EngineFinders) |
| Used Engine (Low Miles) | £2,500 – £4,000 | £900 – £1,400 | £3,400 – £5,400 | 3–6 months (varies) |
Why Reconditioned Wins:
- Full bottom-end rebuild with upgraded bearings & oil pump
- New timing chains & metal-backed tensioners installed
- Supercharger rebuilt or replaced
- Dyno tested & compression certified
- Save 60%+ vs dealership
EngineFinders partners with expert engine rebuilders who upgrade critical AJ133 components – including ARP rod bolts, high-volume oil pumps, and MLS head gaskets – to prevent repeat failures.
Supply & Fit Services: Labour & Logistics Costs
Labour costs vary across the UK – but not as much as you’d think. Here’s what to budget for professional installation:
| London | 12–15 | £110–£140 | £1,320 – £2,100 | Premium garages charge more |
| Leeds | 12–15 | £90–£110 | £1,080 – £1,650 | Competitive independent specialists |
| Bristol | 12–15 | £95–£120 | £1,140 – £1,800 | Strong Land Rover specialist network |
| Manchester | 12–15 | £90–£115 | £1,080 – £1,725 | High availability of skilled techs |
ESTIMATE based on 2024 EngineFinders partner garage data.
EngineFinders includes palletised delivery to your chosen garage – no need to rent a van or handle heavy lifting. We coordinate drop-off and fitment scheduling.
All our supply & fit partners are Land Rover-trained specialists – not generic mechanics. They use OEM-grade engine mounts, coolant, and fluids – and perform post-installation ECU adaptation and supercharger calibration.
Why 12-Month Warranty Matters: What’s Covered (Including Supercharger & Ancillaries)
A dodgy warranty is worse than no warranty. EngineFinders’ 12-Months Unlimited Mileage Warranty covers:
- Full engine block & internals (crank, rods, pistons, bearings)
- Cylinder heads, valves, camshafts, timing chains & tensioners
- Supercharger assembly (including seals, coupler, bypass valve)
- Oil & water pumps, thermostat housing, ancillary brackets
- Labour for removal/refit if failure occurs
NOT covered:
- External sensors or wiring damaged during fitment
- Pre-existing vehicle faults (e.g., faulty wiring harness)
- Modifications (e.g., ECU remaps, oversized superchargers)
Real Example: In 2023, a customer in Leeds had a reconditioned AJ133 fail at 8,000 miles due to a faulty oil pump. EngineFinders covered full engine replacement + labour – £5,100 claim resolved in 72 hours.
Always get warranty terms in writing. EngineFinders provides a digital warranty certificate with every engine – valid at any UK garage in our network.
Reconditioned vs Used AJ133: How to Verify Compression, History & Core Value
Reconditioned AJ133 Engines
- Pros: Professionally rebuilt to exceed OEM spec, upgraded weak points, full dyno & leak test reports, 12-month warranty
- Cons: Slight wait (5–10 days for rebuild)
- Verification Checklist:
- Request compression test (min 180 psi per cylinder)
- Ask for leakdown test results (<5% leakage)
- Confirm use of OEM or ARP fasteners
- Verify supercharger rebuild receipt (OEM PN: LR023897)
Used AJ133 Engines
- Pros: Immediate availability, lower upfront cost
- Cons: Unknown history, may have same failure risks, minimal warranty
- Red Flags:
- No service history or compression test
- Oil leaks or sludge in valve covers
- Supercharger whine or belt dust
- Mileage over 90,000 miles (high risk of imminent failure)
Core Exchange Value: If your old engine is intact (not seized or cracked), you can get £500–£800 off via core return. EngineFinders handles collection and inspection.
Conclusion & CTA: Don’t Overpay for AJ133 Engine Replacement – Compare & Save
The range rover sport supercharged v8 engine cost doesn’t have to drain your bank account – especially when EngineFinders connects you with UK specialists offering reconditioned AJ133 engines at 60% less than Land Rover, backed by a 12-Months Unlimited Mileage Warranty.
Whether you’re in London, Leeds, Bristol or beyond, our supply & fit network ensures professional installation, full diagnostics, and peace of mind.
You didn’t buy a Range Rover Sport to nurse a sick engine. Revive your beast – the smart way.
You can Get Free Quote from Engine Finders and get benefit of lowest prices.
FAQ: Range Rover Sport AJ133 Engine Replacement
How much does it cost to replace a Range Rover Sport Supercharged V8 engine in the UK?
£4,700 – £6,600 for a reconditioned unit with professional fitting – saving you 60% vs Land Rover dealer prices. Labour typically £900–£1,400.
Is the AJ133 engine reliable?
Only if maintained obsessively. Oil changes every 5,000 miles with correct spec oil, and timing chain inspection by 60,000 miles are critical. Most failures stem from neglect.
Can I fix oil consumption instead of replacing the engine?
Temporary fixes (piston soak, thicker oil) exist – but if bearings are damaged, replacement is inevitable. A compression test will tell you.
Does EngineFinders offer a warranty?
Yes, 12-Months Unlimited Mileage Warranty covering engine, supercharger, and labour nationwide.
How long does an AJ133 engine replacement take?
3–5 days for engine rebuild + 2 days for fitment = 5–7 days total. Faster if a used unit is selected.
Can I supply my own engine and just pay for fitting?
Yes, EngineFinders offers “fit-only” services. But warranty coverage requires using our vetted engines.
Will a new engine affect my car’s resale value?
Positively, if documented. A full engine replacement with warranty paperwork can add £3,000–£5,000 to resale vs a problematic original.
