The MG e — Boost – Petrol (SAIC) is a 1,490 cc, inline‑three turbocharged petrol engine with integrated electric motor, produced from 2020 onwards. It features direct injection, a twin — scroll turbocharger, and a 48V mild — hybrid system delivering combined outputs. The electric motor enables torque — fill for responsive low — speed acceleration.
Fitted to models such as the MG HS PHEV, this powertrain was engineered for a blend of performance and efficiency in compact SUV…
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All production years (2020–Present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The MG e-Boost – Petrol (SAIC) is a 1,490 cc inline‑three turbocharged petrol mild-hybrid engineered for compact SUVs (2020-Present). It combines direct fuel injection with a 48V electric motor to deliver responsive acceleration and reduced fuel consumption. Designed to meet Euro 6d standards, it balances performance with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,490 cc | |
Fuel type | Petrol | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Turbocharged (Twin-Scroll) | |
Bore × stroke | 76.0 mm × 87.4 mm | |
Power output | 119 kW (161 PS) + 10 kW (14 PS) electric | |
Torque | 250 Nm + 45 Nm electric @ 1,500–4,000 rpm | |
Fuel system | Direct Injection (Bosch) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled (separate circuits for ICE & e-motor) | |
Turbocharger | Twin-scroll turbo (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | SAIC Longlife 020 (SAE 0W-20) | |
Dry weight | 118 kg (engine only) |
The MG e-Boost – Petrol (SAIC) is used exclusively in MG's HS platform with transverse mounting. This engine features platform-specific adaptations-integrated mounting points for the 48V battery and revised exhaust routing for the GPF. All adaptations are documented in OEM technical bulletins.
The e-Boost – Petrol's primary reliability focus is on the 48V mild-hybrid system and associated thermal management. SAIC service data indicates a minor incidence of software-related drivability glitches, while UK DVSA records show no systemic failures. High ambient temperatures and frequent short trips can stress the cooling system, making adherence to the severe service schedule critical.
Analysis derived from SAIC technical bulletins (2020-2024) and UK DVSA failure statistics (2021-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The e-Boost engine is fundamentally sound, leveraging proven turbocharged petrol architecture with a 48V mild-hybrid addition. Long-term reliability hinges on using the correct 0W-20 oil, high-grade fuel, and adhering to the severe service schedule for coolant, especially for the electric motor circuit. Software updates are also crucial for optimal performance.
The most frequently documented issues involve the 48V system software causing drivability glitches, GPF clogging from short trips or poor fuel, turbo wastegate rattle, and coolant leaks from the dedicated electric motor cooling circuit. These are addressed in various SAIC service bulletins.
This specific 1.5L turbocharged petrol mild-hybrid engine is currently used only in the MG HS Plug-in Hybrid (PHEV) model, available from 2020 onwards. It is not found in other MG vehicles like the ZS or MG4.
Tuning potential is limited and not officially supported. The engine control unit (ECU) is tightly integrated with the 48V hybrid system. Unauthorized remaps can disrupt this synergy, trigger fault codes, and potentially damage the turbocharger or hybrid components, voiding the warranty.
Official combined figures for the MG HS PHEV are around 1.4 L/100km, but this is highly dependent on electric driving. Real-world petrol-only consumption for a mixed drive is approximately 7.0-8.5 L/100km (33-40 mpg UK), varying significantly with driving style and use of the electric motor.
Yes. Like most modern engines, the MG e-Boost petrol engine is an interference design. If the timing chain were to fail, the pistons would collide with the open valves, resulting in catastrophic internal engine damage requiring a rebuild or replacement.
SAIC mandates the use of their specific Longlife 020 specification, which is a 0W-20 viscosity synthetic oil. Using the correct low-viscosity oil is critical for protecting the turbocharger bearings and ensuring proper lubrication of the timing chain under all operating conditions.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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