TheBMW N20is a 1.6 and 2.0L(98 and 122cu in)turbochargedfour-cylinderDOHCpetrol enginewithvariable valve liftandvariable valve timingwhich replaced theN53(orBMW N52in some markets) and was produced from 2011 to 2017 byBMW.Although the N20 is a four-cylinder engine, it is considered a replacement for the naturally aspirated six-cylinder N52/N53 because it powers equivalent models, producing similar horsepower to the N52/N53 with greater low-rpm torque and better efficiency.[1]
| BMW N20 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | BMW |
| Production | 2011-2017 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 1,592cc(97cu in) 1,997cc(122cu in) |
| Cylinder bore | 84.0 mm (3.31 in) |
| Piston stroke | 71.8 mm (2.83 in) 90.1 mm (3.55 in) |
| Cylinder blockmaterial | Aluminium |
| Cylinder headmaterial | Aluminium |
| Valvetrain | DOHC,withVVT&VVL |
| Combustion | |
| Turbocharger | Singletwin-scroll |
| Fuel type | Gasoline |
| Chronology | |
| Predecessor | BMW N52,BMW N53 |
| Successor | BMW B48 |
The N20 features a twin-scroll turbocharger,double-VANOS(variable valve timing),Valvetronic(variable valve lift),direct injection,automatic stop-start[2]and an electric water pump. The N20 was sold alongside the smaller displacementBMW N13turbocharged four-cylinder engine. The N20 was placed inWards Top 10 Enginesin 2012.[3]
In 2014, the N20 began to be replaced by its successor, theBMW B48.
Class action lawsuit alleging timing chain guide failures
editIt has been well documented in online forums, that thousands of early production N20 engines were manufactured with faulty internal plastic timing chain guides. Evidence indicates that defective polycarbonate compositions were utilized in the manufacturing process for the timing chain guide, and as a result over a very short period of time the rigid plastic guides would break down and deteriorate in the engine with little or no warning. Upon failure of these internal plastic components, the timing chain slackens (becomes loose) and "skips time" by jumping teeth on upper cam shaft sprocket, a phenomenon that causes catastrophic damage to the engine by changing the piston-to-valve synchronization and causing these parts to contact each other.
In 2017, a class action lawsuit[4]was filed by several owners against BMW seeking redress for the faulty units. Plaintiffs in the BMW engine defect class action seek to represent a nationwide Class of consumers affected by timing chain guide and secondary chain failure and wear as well as several subclasses for states such as New Jersey, Illinois, Florida, Utah, New York, Colorado, Texas, Alabama, Oklahoma, Massachusetts, California, Wisconsin, Oregon and North Carolina. In 2018 BMW attempted to dismiss the class action lawsuit.[5]In 2019 U.S. District Judge William H. Walls partially granted and partially denied BMW's motion to dismiss claims that it sold vehicles with a known engine defect. Walls also ruled that the automaker cannot escape the suit entirely.[5]
Models
edit| Engine | Displacement | Power | Torque | Redline | Year |
|---|---|---|---|---|---|
| N20B16 | 1,592 cc (97.1 cu in) | 125 kW (168 bhp) at 5,000 rpm |
250 N⋅m (184 lb⋅ft) at 1,500-4,700 rpm |
7,000 | 2013–2016 |
| N20B20 | 1,997 cc (121.9 cu in) | 115 kW (154 bhp) at 5,000 rpm |
240 N⋅m (177 lb⋅ft) at 1,250-4,500 rpm |
7,000 | 2013–2017 |
| 135 kW (181 bhp) at 5,000 rpm |
270 N⋅m (199 lb⋅ft) at 1,250-4,500 rpm |
7,000 | 2011–2017 | ||
| 160 kW (215 bhp) at 5,500 rpm |
310 N⋅m (229 lb⋅ft) at 1,350-4,800 rpm |
7,000 | 2012–2017 | ||
| 180 kW (241 bhp) at 5,000 rpm |
350 N⋅m (258 lb⋅ft) at 1,250-4,800 rpm |
7,000 | 2011–2017 |
N20B16
editApplications:
125 kW version
N20B20
editApplications:[7]
115 kW version
135 kW version
- 2011–2015E84X1 xDrive/sDrive20i
- 2011–2017F25X3 xDrive20i
- 2012–2015F30320i
- 2013–2016F34320i GT
- 2014–2016F32420i
- 2011–2016F10520i
- 2013-2016F10520Li
- 2011–2016E89Z4 sDrive20i
- 2014–2016F22220i
- 2015-2017BrillianceHuasong 7MPV[8]
160 kW version
- 2012–2017F20125i
- 2013–2016F10525Li
- 2015-2017BrillianceHuasong 7MPV[8]
180 kW version
- 2011–2016E89Z4 sDrive28i[9]
- 2011–2015E84X1 xDrive/sDrive28i[10]
- 2012–2017F25X3 xDrive28i
- 2011–2016F30328i
- 2014-2016F32428i
- 2012–2016F10528i
- 2013–2016F34328i GT
- 2014–2016F22228i
- 2014–2017F26X4 xDrive28i
2016–2018F15X5 xDrive40e
See also
editReferences
edit- ^"N20 series engines – BMW goes for less, delivers more".www.cbt.com.my.Archived fromthe originalon 26 October 2013.
- ^"BMW N20 and N26 Four Cylinder Turbocharged Engines".www.unixnerd.demon.co.uk.Archived fromthe originalon 20 February 2020.Retrieved30 April2017.
- ^"BMW's Innovative 4-Cyl. Blazes New Path for Smaller Engines".www.wardsauto.com.Retrieved3 June2012.
- ^"BMW Class Action Seeks Fix for Engine Chain Defect".Top Class Actions.2017-11-17.Retrieved2019-05-29.
- ^ab"BMW Engine Defect Class Action Moves Forward With Warranty Claims".Top Class Actions.2018-11-02.Retrieved2019-05-29.
- ^"BMW 5 Serisi Sedan: Teknik Veriler".www.bmw.com.tr(in Turkish). Archived fromthe originalon 25 October 2013.
- ^"BMW 3 Series Sedan".www.bmw.com.au.Archived fromthe originalon 23 September 2015.Retrieved3 June2012.
- ^ab"Brilliance Huasong 7 MPV".www.chinaautoweb.Retrieved8 March2015.
- ^"BMW 4-Cylinder Engines Return to US in 2011 in the Z4 sDrive28i".www.bmwgroup.com.Retrieved14 May2012.
- ^"BMW X1 sDrive28i - Features & Specs".www.bmwusa.com.Retrieved16 August2013.