The Jaguar FMBA – Petrol is a 2,995 cc, supercharged V6 engine produced between 2010 and 2018. It forms part of Jaguar's AJ-V6 Gen III family, featuring a Roots-type supercharger, direct and port fuel injection (Twin-Pulse), and variable valve timing on both intake and exhaust camshafts. In standard tune, it produces 250 kW (340 PS) and 450 Nm of torque, delivering strong mid-range response and linear power delivery.
Fitted to models such as the XF (X250), XK (X150), and early F-Type (X152), the FMBA – Petrol was engineered for a balance of performance and refinement. Its supercharged character provides immediate throttle response, making it well-suited for grand touring. Emissions compliance was achieved through dual lambda sensors, close-coupled catalytic converters, and evaporative emissions control, enabling Euro 5 compliance across its production run.
One documented concern is supercharger bypass valve (SBV) failure, which can lead to overboost or loss of power. This issue, referenced in Jaguar Service Bulletin XJSIB 34‑02‑08, stems from fatigue in the actuator diaphragm under repeated thermal cycling. Later production revisions included a redesigned valve with improved elastomer materials and revised ECU logic to reduce actuator stress.
Jaguar
All production years (2010–2018) meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Jaguar FMBA – Petrol is a 2,995 cc supercharged V6 engine from the AJ-V6 Gen III series (2010–2018). It combines direct and port fuel injection with a Roots-type supercharger to deliver strong mid-range torque and responsive performance. Designed to meet Euro 5 standards, it balances sporty character with daily drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,995 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Supercharged (Eaton Roots-type) | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 250 kW (340 PS) @ 6,500 rpm | |
| Torque | 450 Nm @ 3,500–5,000 rpm | |
| Fuel system | Twin-Pulse (direct + port injection) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Supercharger | Eaton M62 Roots-type (intercooled) | |
| Timing system | Double roller chain (front-mounted) | |
| Oil type | Jaguar Specification WSS-M2C947-A | |
| Dry weight | 192 kg |
The supercharged V6 delivers strong mid-RPM torque ideal for spirited driving but requires consistent inspection of the supercharger bypass valve and intercooler plumbing. Jaguar Specification WSS-M2C947-A oil is critical due to high thermal loads on the supercharger bearings and timing chain. Extended idling should be minimized to reduce heat soak in the intercooler system. The Twin-Pulse fuel system demands high-octane fuel (98 RON) to prevent knock under boost. Pre-2014 units should have the SBV upgrade per Jaguar SIB XJSIB 34-02-08. Catalytic converters require periodic inspection to prevent melting under sustained high load. ECU updates improve boost control stability in high-ambient conditions.
Oil Specs: Requires Jaguar WSS-M2C947-A specification (Jaguar SIB XJSIB 34-02-08). Supersedes ACEA A3/B4 standards.
Emissions: Euro 5 certification applies to all model years 2010–2018 (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under ISO 1585 standards. Output consistent across UK and EU markets (Jaguar TIS Doc. J36015).
Jaguar Technical Information System (TIS): Docs J34680, J35142, J35631, SIB XJSIB 34-02-08
VCA Type Approval Database (VCA/EMS/6789)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Jaguar FMBA – Petrol was used across Jaguar's X250/X150 platforms with longitudinal mounting and shared design principles with Land Rover for potential transverse adaptation studies. This engine received platform-specific adaptations-shortened intake manifolds in the XF and revised exhaust manifolds in the XK-and from 2014 the updated F-Type models adopted higher-output variants with revised supercharger calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side cylinder block near the starter motor (Jaguar TIS J34890). The 8th VIN digit indicates engine type ('F' for FMBA series). Pre-2014 models have silver cam covers with black plastic intake; post-2014 units use black cam covers. Critical differentiation from AJ-V8: FMBA – Petrol has front-mounted supercharger with intercooler ducting, while AJ-V8 uses side-mounted intake. Service parts require production date verification - supercharger bypass valves for engines before 09/2013 are incompatible with later units due to internal redesign (Jaguar SIB XJSIB 34-02-08).
The FMBA – Petrol's primary reliability risk is supercharger bypass valve failure on early builds, with elevated incidence in hot climates and stop-start use. Internal Jaguar quality reports from 2015 indicated a notable share of pre-2014 engines requiring SBV replacement before 120,000 km, while UK DVSA records link a significant portion of emissions-related MOT failures to lambda sensor degradation in high-mileage vehicles. Extended idling and delayed oil changes increase supercharger and chain stress, making oil quality and interval adherence critical.
Analysis derived from Jaguar technical bulletins (2010-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
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