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 applications. Emissions compliance is achieved through gasoline particulate filtration (GPF) and the mild-hybrid system, meeting stringent Euro 6d standards across all markets.
One documented engineering focus is managing thermal loads from the integrated electric motor and turbocharger, addressed in SAIC's Technical Service Bulletin TSB‑EV‑08/22. This involves specific coolant flow paths and revised heat shielding. Software updates have been issued to optimize the transition between electric and combustion power.
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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 mild-hybrid system provides instant torque-fill, making the engine feel more responsive in city driving but requires the specific SAIC Longlife 020 (0W-20) oil to protect the turbo and timing chain. The twin-scroll turbo and GPF demand high-quality, low-ash fuel to prevent clogging. Coolant for the electric motor circuit must be replaced per the severe service schedule to prevent overheating, as outlined in SAIC TSB TSB-EV-08/22. Software updates are critical for smooth powertrain transitions.
Oil Specs: Requires SAIC Longlife 020 (0W-20) specification (SAIC Owner's Manual HS PHEV).
Emissions: Euro 6d certification applies to all model years (2020-Present) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Combined system output requires 95 RON fuel (SAIC TIS Doc. ENG-1490-01).
SAIC Technical Information System (TIS): Docs ENG-1490-01, TURBO-1490, SIB FUEL-03/21, TSB TSB-EV-08/22
VCA Type Approval Database (VCA/EMS/5678)
SAIC Group Powertrain Specifications 2023 (PT-2023)
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.
Locate the engine code stamped on the front face of the cylinder block, below the exhaust manifold (SAIC TIS ENG-ID-01). The 8th VIN digit for the HS PHEV is 'P'. Visually, the engine is identifiable by its compact inline-3 layout, the bright orange high-voltage cables running to the belt-driven starter-generator (BSG), and the twin-scroll turbo housing. Critical differentiation from non-hybrid 1.5T: The e-Boost engine has a larger, more complex intake manifold housing the BSG motor and a 48V battery located under the front passenger seat. Software version must be checked via diagnostics for correct TSB application.
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.
Find answers to most commonly asked questions about MG E-BOOST.
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