BMW M54 vs 1.8 TCe: which engine is more reliable?

According to our risk index, the 1.8 TCe carries less risk than the BMW M54: 32/100 (moderate risk) versus 54/100 (high risk). The BMW M54 has 2 documented serious faults, the main one being «Thermostat and water pump failure»; the 1.8 TCe has 2 documented serious faults, the main one being «A110 oil pressure solenoid valve sticking in 2018–2019 cars».

Risk index

BMW M54

High risk · 2 serious faults

Risk index

1.8 TCe

Moderate risk · 2 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 31 October 202611 sources How we work

Is the BMW M54 reliable?

The BMW M54 (2000-2006) is a naturally aspirated petrol inline-six with a reputation for longevity, passing 200,000 km if maintained. Its weak points are the crankcase ventilation valve and the plastic cooling system; check that they have been renewed.^[1][2][3]

See the 5 of the BMW M54 faults

Is the 1.8 TCe reliable?

The 1.8 TCe (M5P) in the Alpine A110 and the Mégane R.S. IV has no documented endemic faults. What has been published are recalls for the A110: the oil pressure solenoid valve (2019) and the fuel pump (2021 and 2023). We have found no recalls or complaints about this engine in the Mégane R.S.^[4][5][6][7]

See the 2 of the 1.8 TCe faults

Side-by-side comparison

Comparison of BMW M54 and 1.8 TCe
Item	BMW M54	1.8 TCe
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,798 cm³
Timing	Chain	—
Power	170–235 hp	252–350 hp
Production	2000–2006^[8][9]	2017–2026^[7][10][11]
Reliability
Risk index (what is it?)	54High risk	32Moderate risk
Documented faults	5	2
Of high or critical severity	2	2
Worst severity	High severity	High severity
Main faults	High severity: Thermostat and water pump failure High severity: Cracked expansion tank and coolant leak Medium severity: Cracked crankcase ventilation valve (CCV) and oil consumption	High severity: A110 oil pressure solenoid valve sticking in 2018–2019 cars High severity: A110 fuel pump that can leave the car unable to start when hot
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	1.8 TCe 280–300 hp (M5P, Mégane R.S. IV, 2018–2023)^[4][6][7]
With cautionVersions to be cautious about	M54B22, 2.2 litres (168-170 hp)^[1][2][3] M54B25, 2.5 litres (189-192 hp)^[1][2][3] M54B30, 3.0 litres (228-235 hp)^[1][2][3]	1.8 TCe 252–350 hp (M5P, Alpine A110, 2017–2026)^[4][6]
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 M54

1.8 TCe

Other comparisons

With the BMW M54

With the 1.8 TCe

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Sources

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

BMW M54 Engine Guide: Reliability, Common Problems & Tuning PotentialEuro Premium Parts · Technical documentation · consulted 5 October 2026
Il motore da 6 cilindri che supera agilmente i 300.000 kmAutoblog.it · Motoring press · published 13 February 2026 · consulted 5 October 2026 · in Italian
BMW M54 reliabilityAutoscore · Other source · consulted 5 October 2026
Rappels Alpine A110 (2019). Risque de casse moteurL'argus · Motoring press · published 28 August 2019 · consulted 31 October 2026 · in French
Rappel Alpine A110. La pompe à essence de 2 849 exemplaires remplacéeL'argus · Motoring press · published 7 September 2021 · consulted 31 October 2026 · in French
Alpine A110. Un nouveau rappel pour remplacer des pompes à essenceL'argus · Motoring press · published 25 October 2023 · consulted 31 October 2026 · in French
Renault Mégane IVWikipedia (fr) · Other source · consulted 31 October 2026 · in French
BMW M54Wikipedia (inglés) · Other source · consulted 5 October 2026
BMW M54Wikipedia (alemán) · Other source · consulted 5 October 2026 · in German
Alpine A110 (2017)Wikipedia (en) · Other source · consulted 31 October 2026
Alpine A110 (2017)Wikipedia (fr) · Other source · consulted 31 October 2026 · in French