Mercedes-Benz M281 engine

The M281 is a straight-three petrol engine produced by Mercedes-Benz since 2014.

Mercedes-Benz M281
Overview
Manufacturer	Mercedes-Benz
Also called	Renault H4D Renault H4B Nissan BR
Production	2014–
Layout
Configuration	Straight-three engine
Displacement	1.0 L (999 cc) 0.9 L (898 cc) (M281 E09 LA)
Cylinder bore	72.2 mm
Piston stroke	81.3 mm 73.1 mm (M281 E09 LA)
Cylinder block material	Aluminium alloy
Cylinder head material	Aluminium alloy
Valvetrain	DOHC
Compression ratio	10.5:1 9.5:1 (M281 E09 LA)
Combustion
Turbocharger	Single-turbo (M281 E09 LA)
Fuel system	Multi-point injection
Fuel type	Petrol
Oil system	Dry sump. Motor oil provided by Petronas

Design

The M281 uses an aluminium alloy cylinder block and head, and features a dual overhead camshaft with 4 valves per cylinder.^[1] It is transversely mounted and is available in three configurations: naturally aspirated with 45 kW (60 hp) or 53 kW (71 hp), or as a turbocharged 66 kW (89 hp) version.^[2][3] These engines are used in Smart, Renault, Nissan, and Dacia models due to Daimler A.G.'s involvement in the Renault–Nissan–Mitsubishi Alliance since 2010.^[4]

Models

Engine	Displacement	Power	Torque	Years
M281 E10 R	999 cc (61 cu in)	45 kW (60 hp) at 6,000 rpm	87 N⋅m (64 lb⋅ft) at 3,500 rpm	2014–
M281 E10		52 kW (70 hp) at 6,000 rpm	91 N⋅m (67 lb⋅ft) at 2,850 rpm
M281 E09 LA turbocharged	898 cc (55 cu in)	66 kW (89 hp) at 5,500 rpm	135 N⋅m (100 lb⋅ft) at 2,500 rpm
M281 E09 LA turbocharged	898 cc (55 cu in)	80 kW (107 hp) at 5,750 rpm	170 N⋅m (125 lb⋅ft) at 2,000 rpm	2016–2018|
M281 E09 LA turbocharged	898 cc (55 cu in)	92 kW (123 hp) at 5,550 rpm	200 N⋅m (148 lb⋅ft) at 2,000 rpm

M281 E10 R

• 2014–2019 C453/A453 Smart Fortwo
• 2014–2019 W453 Smart Forfour

M281 E10 (Nissan HR10DE/Renault H4D)

• 2014–2019 C453/A453 Smart Fortwo
• 2014–2019 W453 Smart Forfour
• 2014–present Renault Twingo III
• 2017–2020 Dacia Sandero II 1.0 SCe
• 2017–2020 Dacia Logan II 1.0 SCe
• 2017–2022 K14 Nissan Micra 1.0

M281 E09 LA (Nissan HR09DET/Renault H4Bt)

• 2014–2019 C453/A453 Smart Fortwo
• 2014–2019 W453 Smart Forfour
• 2014–present Renault Twingo III
• 2014–2020 Dacia Sandero II 0.9 TCe
• 2014–2020 Dacia Logan II 0.9 TCe
• 2017–2022 K14 Nissan Micra 1.0
• 2014-2019 Renault Clio IV 0.9