BMW N20 vs 0.9 TCe: which engine is more reliable?

According to our risk index, the 0.9 TCe carries less risk than the BMW N20: 49/100 (moderate risk) versus 63/100 (high risk). The BMW N20 has 2 documented serious faults, the main one being «Timing chain guide and tensioner wear (2011-2015)»; the 0.9 TCe has 3 documented serious faults, the main one being «Coolant leak at the thermostat housing».

Risk index

BMW N20

High risk · 2 serious faults

Risk index

0.9 TCe

Moderate risk · 3 serious faults

Lower risk

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 27 September 20268 sources How we work

Is the BMW N20 reliable?

The BMW N20 (2011-2017) was the first turbocharged four-cylinder with which BMW replaced its naturally aspirated six-cylinders in models such as the 320i, 328i and X3, and it is generally mechanically sound. Its best-documented weak point is the timing chain guides and tensioner on units built before 2015; oil leaks, the electric water pump and, to a lesser extent, the turbo and the high-pressure fuel pump are also known issues.^[1][2]

See the 5 of the BMW N20 faults

Is the 0.9 TCe reliable?

The 0.9 TCe (H4Bt) is a three-cylinder turbo with a good reliability reputation, better than that of its sibling the 1.2 TCe: it does not share the same oil consumption or the same rate of chain problems. Its most-cited weak point is a coolant leak at the thermostat housing, which if ignored can end up damaging the head gasket; chain, turbo and lambda sensor cases appear less often.^[3][4]

See the 5 of the 0.9 TCe faults

Side-by-side comparison

Comparison of BMW N20 and 0.9 TCe
Item	BMW N20	0.9 TCe
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,997 cm³	898 cm³
Timing	Chain	Chain
Power	156–245 hp	90 hp
Production	2011–2017^[1][5]	2012–2024^{[3][4][6][7][8]}
Reliability
Risk index (what is it?)	63High risk	49Moderate risk
Documented faults	5	5
Of high or critical severity	2	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: Timing chain guide and tensioner wear (2011-2015) Critical severity: Electric water pump failure (BMW campaign in the US over fire risk) Medium severity: Oil leaks from the rocker cover gasket and the filter housing	High severity: Coolant leak at the thermostat housing Critical severity: Timing chain or tensioner failure High severity: Turbocharger wear or failure
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	N20B20 156 hp (115 kW, 2013-2016)^[2] N20B20B 184 hp (135 kW, 2011-2017)^[2] N20B20 218 hp (160 kW, 2012-2015)^[2] N20B20A 245 hp (180 kW, 2011-2017)^[2]	0.9 TCe 90 (H4Bt, 2012-2024)^[3][4]
AvoidVersions to avoid	None	None

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

BMW N20

See the 8 models with the BMW N20

0.9 TCe

See the 8 models with the 0.9 TCe

Other comparisons

With the BMW N20

With the 0.9 TCe

Compare other engines

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Sources

Every fact on this page links to its source. If you find an error, let us know.

BMW N20Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW N20 Engine: Pros, Cons, Reliability, Tuning, and Maintenance GuideBMW BLOG · Motoring press · published 8 June 2025 · consulted 27 September 2026
Fiabilité des 0.9 TCeFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Moteur H Renault-NissanWikipedia (francés) · Other source · consulted 27 September 2026 · in French
BMW N20Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Mercedes-Benz M281 engineWikipedia (inglés) · Other source · consulted 27 September 2026
Renault ClioWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Dacia SanderoWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish