Boxster 2.5L-2.7L Engines
from £2,800 to £5,200
Rebuilt units from £2,800 · Common codes: M96.20, M96.22, M96.23, M97.20
Get quotes from trusted UK Porsche Boxster engine specialists. Compare reconditioned & used engines for Boxster to Spyder - M96/M97/9A1 covered. Get a quote before it's too late.
Boxster 2.5L-2.7L Engines
from £2,800 to £5,200
Rebuilt units from £2,800 · Common codes: M96.20, M96.22, M96.23, M97.20
Boxster S 3.2L-3.4L Engines
from £4,200 to £7,800
Rebuilt units from £4,200 · Common codes: M96.21, M96.24, M97.21, M97.22
Boxster 718 Turbo & Spyder Engines
from £5,500 to £11,500
Rebuilt units from £5,500 · Common codes: MA1.22, MA1.23, M97.24

Most replacements completed within 3-5 days.


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Not sure which variant your Porsche Boxster is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.

Every engine code fitted to the Porsche Boxster across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Extracted from detailed petrol and performance engine families across Porsche Boxster variants.

M96.20 - 2.5L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
Avg. rebuilt price
£2,800 - £4,500
Supply only
Technical specifications
Common failures
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Porsche Boxster engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.

The Porsche Boxster's flat-six engines deliver iconic performance but face well-documented challenges, particularly IMS bearing failure on M96 units and timing chain issues on M97. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month unlimited...
IMS Bearing Failure
Most affected vehicles
Porsche Boxster 2.5, 2.7, S 3.2 (986, 1997-2004, M96.20/M96.21/M96.22/M96.23/M96.24)
Failure mileage range
60,000-100,000 miles
Typical failure window
Root cause
The intermediate shaft bearing uses a sealed design that can degrade over time, allowing metal particles to enter the engine and cause catastrophic damage if the bearing fails completely.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative IMS Upgrade - Replace bearing before failure | £1,800 - £2,800 | £950 - £1,600 | Remove gearbox, install upgraded open-bearing IMS kit with improved seals | Preventative only; viable if caught before symptoms appear, extends engine life significantly |
| Full Replacement - Rebuilt M96 Engine - Address catastrophic failure | £6,500 - £11,000 | £4,200 - £7,800 | Supply & fit rebuilt engine with upgraded IMS, new seals, bench-tested, 12-month warranty | Best value when failure has occurred; upgraded components address original weak point |
Our recommendation
If your M96 Boxster is under 80k miles with no symptoms, a preventative IMS upgrade from a specialist offers excellent value. If you're hearing rattles or have confirmed failure, replacement with a rebuilt unit featuring upgraded internals is the only reliable solution.
Compare rebuilt M96 engine prices for your Porsche Boxster
Every Porsche Boxster engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
Compare Porsche Boxster engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Porsche Boxster within hours.

Every displacement fitted to the Porsche Boxster is listed below, with compatible engine codes, production years and common failure notes to help you identify the right replacement.
The entry-level flat-six for the original 986 Boxster, offering smooth naturally-aspirated performance but susceptible to IMS bearing issues that dominate UK replacement enquiries for this displacement.
Engine Code(s)
M96.20
Compatible Models (UK)
Boxster 2.5 (986, 1997-1999), Boxster 2.5 Tiptronic
Power output
Verified by registration
Common Failure Points
IMS bearing wear, rear main seal leaks on higher-mileage units
Production Years: 986, 1997-1999
Get quotes for Porsche Boxster 2.5L petrol engines
Choose your Porsche Boxster engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early 2.5L naturally aspirated to the latest 718 turbocharged units.
All Porsche Boxster models use petrol flat-six or flat-four engines; naturally aspirated units dominate classic 986/987 generations while modern 718 variants feature turbocharged displacement.
Common Porsche Boxster Petrol Engine Families
Found In
Known For
Typical Petrol Models
All Porsche Boxster models use petrol flat-six or flat-four engines; naturally aspirated units dominate classic 986/987 generations while modern 718 variants feature turbocharged displacement.
Common Porsche Boxster Petrol Engine Families
Found In
Known For
Typical Petrol Models
Not sure which fuel type your Porsche Boxster has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Porsche Boxster specialists.

This section covers all major engine changes across the Boxster's production timeline, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
⚙Key Changes
▣Main Engines
M96.20- 2.5L petrol (Boxster 2.5)
▰Popular Models
🔧Known For
Engine Codes Covered:
M96.20