The
M9R and
M9T are a family of
straight-four 16-valve turbocharged diesel engines co-developed by
Nissan and
Renault, and also
Mercedes-Benz Group in the case of the M9T/OM699. Following Renault's designation plan, the last letter (M9
R resp. M9
T) is to indicate the swept volume of 2.0 L resp. 2.3 litres. Despite the similar names, the diesel engines are only loosely related to the MR gasoline engines. M9R is built at Renault's Cleon factory in Normandy. As of late 2018, a new version of the M9R using adBlue and with slightly different internal dimensions replaced the original M9R. Features of the diesel engines include a cast-iron block, aluminium alloy cylinder head with double overhead camshafts, 16-valve layout and a bushes timing chain. The
M9T is directed to heavier vehicles like the Nissan Navara or the Renault Master. It features a bore and stroke of for a total displacement of , balancer shafts, typical speeds are 3500 rpm for maximum power and 1250 rpm for maximum torque. Low output versions of the
M9R for the Renault Trafic II at had been replaced by the Renault R engine with the introduction of the Trafic III, while versions starting from include VNT chargers. The top version of the Navara utilizes the
M9T with
twin-turbochargers and . During production period engines had been updated up to
Euro 6 (in early 2017).
M9R | (Gen 5) | }} | | (Gen 5) }} }} The
M9R is a
16-valve turbocharged diesel engine developed by the
Renault–Nissan Alliance, and first installed in the
Renault Laguna in 2006. It is available in the tune in
Nissan Qashqai,
Nissan X-Trail,
Renault Mégane,
Renault Koleos and
Renault Laguna models. In this trim the engine achieves maximum power at 4000 rpm and maximum torque of at 2000 rpm. A form with particulate filter is available in
Renault Laguna and
Nissan X-Trail models. A variant is also available on the Laguna GT. In both engines maximum power is achieved at 3750 rpm and maximum torque is available from 1750 rpm. In order to reduce vibrations,
balance shafts are included in some versions of the engine. The 2.0 dCi engine in all its versions complies with the
Euro 4 and 5 standards for exhaust emissions. The New Mégane and New Laguna respectively emitted /km and /km of
CO2 and the version of New Laguna 2.0 dCi emits /km of CO2; they all comply with the
Euro 5 standards for exhaust emissions. In 2011 the M9R engines has been updated with an optional package to lower exhaust emissions (Euro5) and
fuel consumption. These engines are tagged "2.0 Energy dCi 130" resp. "2.0 Energy dCi 150", typically maximum power is available at 3750 rpm and maximum torque at a minimum of 1750 rpm. The package comprises: • Stop & Start • Active thermal management • Smart electrical management • Variable capacity oil pump The CO2 values were thus reduced to 118 g/km for the Laguna both the 2.0 Energy dCi 130 and 2.0 Energy dCi 150. Towards the end of 2018, the 2-liter M9R engine became the "M9R Gen 5" when it received a thorough redesign to comply with the increasingly stringent anti-pollution regulations: first of all the engine dimensions were changed, from to - using the same bore as the larger M9T but with nearly no change in displacement, which increases by 2 cc to 1997 cc. Another important innovation introduced with this update was the BluedCi technology, which involves the installation of a small tank of adBlue, a chemical additive that is injected upstream of the catalyst and which, when combined with the exhaust gas, causes a reaction chemistry within the catalyst itself. This reaction transforms most of the nitrogen oxides into harmless nitrogen and water vapor. This engine debuted in two power levels, , in the Renault Talisman II 2.0 Blue dCi which was produced from December 2018. In December 2020 a single 190 PS version replaced both of the earlier versions. The engine is fitted to the following vehicles: • 2007–2011
Nissan Qashqai • 2007–2012
Nissan X-Trail • 2005–2015
Renault Laguna • 2006–2015
Renault Mégane • 2007–2016
Renault Koleos • 2006–2014
Renault Espace • 2007–2010
Renault Vel Satis • 2011–2012
Renault Scénic • 2015
Nissan Teana • 2006–2014
Vauxhall Vivaro Renault Trafic Nissan Primastar • 2010–2015
Renault Latitude • 2015–2023
Renault Espace V M9T The
M9T is a version specifically designed for
light commercial vehicles that is manufactured by Renault in
Cléon. It was introduced on the
Renault Master and its
badge engineered derivatives, initially with power ranging from to , and torque ratings starting at up to . Later, it was also introduced to the
Nissan Navara and the
Mercedes-Benz X-Class. Nissan calls it the
YS23 while in Mercedes-Benz vehicles, it is named the
OM699. The engines with lower power ratings feature a single fixed geometry turbocharger, while the more powerful versions have a
variable-geometry turbocharger or
twin-turbochargers. The engines are compliant with the
Euro 6 emission regulations. Applications: •
Dongfeng •
Z9 •
Mercedes-Benz •
X-Class •
Nissan •
Navara •
NV400 •
Terra •
Opel •
Movano •
Renault •
Alaskan •
Master •
Vauxhall •
Movano File:Nissan_YS23DDTT_Engine.jpg|Nissan YS23DDTT Engine ==See also==