Jaguar SType 4.0 V8 Engine Replacement - Compare Prices & Get Quotes
Get quotes today from trusted UK Jaguar S-Type 4.0 V8 engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective replacement for your executive saloon.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £1,900 to £3,600 [ESTIMATED - using AJ26 as proxy from EM data]
Used from £800 · Reconditioned from £1,500 · Common codes: AJ26
From £800
Tested, bare/short engine
From £1,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Jaguar S-Type 4.0 V8 specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Jaguar S-Type 4.0 V8 Replacement Engineto Finding the Best Jaguar S-Type 4.0 V8 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryJaguar S-Type 4.0 V8 - Engine History & Specs at a Glance
When the Jaguar S-Type 4.0 V8 launched in 1999, it served as the flagship naturally aspirated petrol option for the X200 generation, delivering smooth, effortless cruising and refined power before being replaced by the updated 4.2L unit in 2003.
Variant HistoryJaguar S-Type 4.0 V8 - Engine History & Specs at a Glance
When the Jaguar S-Type 4.0 V8 launched in 1999, it served as the flagship naturally aspirated petrol option for the X200 generation, delivering smooth, effortless cruising and refined power before being replaced by the updated 4.2L unit in 2003.
Jaguar S-Type 4.0 V8
Fuel TypePetrol
Engine Size Range4.0L
Power Output Range280-290hpEngine History Timeline
AJ26 4.0L V8 introduced delivering 280-290hp and establishing the X200's premium petrol credentials with a robust dual-overhead-cam design.
Production of the 4.0L variant ceased as Jaguar transitioned the flagship naturally aspirated role to the updated 4.2L AJ33 V8 featuring revised intake geometry and enhanced low-end torque.
Key Specs Snapshot
Fuel TypePetrolEngine Size Range4.0LPower Output Range280-290hpYears Produced1999-2002Every engine fitted to the Jaguar S-Type 4.0 V8 is covered below, with UK rebuilt pricing and known failure points.
Jaguar S-Type 4.0 V8 Engine Codes - Specifications & Replacement CostJaguar S-Type 4.0 V8 Engine Codes - Specifications & Replacement Cost
4.0L Petrol (1999-2002)
Power Output280-290hpYears Fitted1999-2002
Compatible Trim Levels
- 4.0 V8 Classic
- 4.0 V8 SE
- 4.0 V8 Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£800-£1,500 [ESTIMATED - using AJ26 as proxy]
Reconditioned
Addressed known issues, tested
£1,500-£2,800 [ESTIMATED - using AJ26 as proxy]
Rebuilt
Full teardown, upgraded internals
£1,900-£3,600 [ESTIMATED - using AJ26 as proxy from EM data]
Common Failure
Main bearing wear and timing chain tensioner degradation, typically observed between 70,000-110,000 miles, often exacerbated by extended oil service intervals.
The Jaguar S-Type 4.0 V8 reliability landscape is defined by its AJ26 architecture. While offering refined performance, it is susceptible to specific high-mileage wear points. Rebuilt engines supplied through EnginesMarket include upgraded internal components designed to permanently address these original failure points, backed by a minimum 12-month unlimited mileage warranty.
Why the Jaguar S-Type 4.0 V8 AJ26 Wears Prematurely
Affected Vehicles
Jaguar S-Type 4.0 V8 (AJ26, 1999-2002)
Typical Failure Mileage
70,000 - 110,000 miles
Root Cause
Extended oil service intervals and the original composite timing chain guides degrade under heat cycles, allowing chain slack. This can lead to oil pressure drops and main bearing wear, or in severe cases, timing jumps and valve contact.
Why It Happens
Extended oil service intervals and the original composite timing chain guides degrade under heat cycles, allowing chain slack. This can lead to oil pressure drops and main bearing wear, or in severe cases, timing jumps and valve contact.
Dealer (parts + labour)
£2,200-£2,800
Specialist (parts + labour)
£1,100-£1,500
What it involves
Replacing plastic guides, metal tensioner, and chains before catastrophic failure occurs.
Suitability
Adds 50,000-80,000 miles of reliable service if caught early with no fault codes.
1 - 2 daysDealer (parts + labour)
£4,500-£6,500
Specialist (parts + labour)
£1,900-£3,600
What it involves
Complete engine swap with upgraded metal tensioners, bench-tested long block, supply & fit.
Suitability
Lifetime solution with 12-month warranty; resolves all internal wear simultaneously.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor - Preventative Timing Kit Installation Minor | £2,200-£2,800 | £1,100-£1,500 | Replacing plastic guides, metal tensioner, and chains before catastrophic failure occurs. | Adds 50,000-80,000 miles of reliable service if caught early with no fault codes. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £4,500-£6,500 | £1,900-£3,600 | Complete engine swap with upgraded metal tensioners, bench-tested long block, supply & fit. | Lifetime solution with 12-month warranty; resolves all internal wear simultaneously. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 1999-2002 Jaguar S-Type 4.0 V8 holds a UK market value of approximately £1,500-£4,000 [THIRD-PARTY]. At this valuation, a rebuilt engine replacement (£1,900-£3,600) may approach or exceed 60-80% of the vehicle's total value. We strongly advise evaluating the overall condition, MOT status, and sentimental value of the vehicle before committing. If the lowest viable replacement cost exceeds approximately 60% of the vehicle's current market value, evaluate scrap value before committing.
Our Recommendation
Our Recommendation
If your Jaguar S-Type 4.0 V8 is exhibiting early timing chain rattle but runs smoothly, a preventative timing kit installation from a trusted specialist is the most cost-effective first step. However, if main bearing knock is present, a full rebuilt engine with upgraded internals is the only reliable long-term solution, provided the vehicle's overall condition warrants the expense.
Don't Let Engine Failure Write Off Your Jaguar S-Type 4.0 V8
Whether you are dealing with timing chain rattle, main bearing wear, or cooling system leaks on your Jaguar S-Type 4.0 V8, the financial decision between repeated dealership repairs and a complete engine replacement is straightforward. EnginesMarket connects you with trusted UK specialists who supply fully rebuilt engines featuring upgraded internal components that permanently address the original design flaws. Every unit comes with a minimum 12-month unlimited mileage warranty, nationwide delivery, and optional supply & fit packages, allowing you to bypass main dealer markups and return to the road with confidence.
Compare rebuilt AJ26 Jaguar S-Type 4.0 V8 engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Jaguar S-Type 4.0 V8. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Jaguar S-Type 4.0 V8 Engine ReplacementFrequently Asked Questions
Question 1How much does a Jaguar S-Type 4.0 V8 engine replacement cost-
A rebuilt Jaguar S-Type 4.0 V8 engine typically costs between £1,900 and £3,600 for supply only, while a reconditioned unit ranges from £1,500 to £2,800.
- Rebuilt units include upgraded timing components to prevent future failures.
- Supply and fit packages typically add £800-£1,500 in labour depending on location.
Question 2What are the signs of AJ26 engine failure in a Jaguar S-Type 4.0 V8-
The most common early warning sign is a distinct metallic rattling noise on cold startup that lasts 1-2 seconds.
- Advanced failure may present as low oil pressure warnings, engine knocking, or sudden loss of power.
Question 3Is it worth replacing the engine in a Jaguar S-Type 4.0 V8-
Given the typical market value of a 1999-2002 Jaguar S-Type 4.0 V8 (£1,500-£4,000), a full engine replacement often approaches the vehicle's total value.
- It is only financially viable if the car has low mileage, solid bodywork, and holds significant sentimental or classic value.
- For most owners, evaluating the scrap or part-exchange value is the most prudent first step.
Question 4Do I need to reprogram the ECU after replacing my Jaguar S-Type 4.0 V8 engine-
Most Jaguar S-Type 4.0 V8 engine swaps do not require full ECU reprogramming if you fit an identical AJ26 engine code.
- However, the PATS immobiliser system may require dealer-level diagnostic tools to pair the new engine's ECU with your car's existing security module.
- Supply and fit specialists often handle this ECU pairing as part of the installation service.
Question 5How long does a Jaguar S-Type 4.0 V8 engine replacement take-
A professional supply and fit service for a Jaguar S-Type 4.0 V8 typically takes 2 to 3 working days.
- This includes the physical engine swap, fluid replacement, and mandatory ECU adaptation learning.
- Nationwide mobile fitting or collection services are available through our vetted specialist network.
Why Choose UsCompare Jaguar S-Type 4.0 V8Engine PricesToday
100+ Jaguar S-Type 4.0 V8 engines sourced through our network
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