1.0 PureTech vs BMW B58: which engine is more reliable?

According to our risk index, the BMW B58 carries less risk than the 1.0 PureTech: 38/100 (moderate risk) versus 57/100 (high risk). The 1.0 PureTech has 2 documented serious faults, the main one being «Excessive oil consumption through the piston rings»; the BMW B58 has 1 documented serious fault, the main one being «Failure of the oil pump with a plastic rotor housing».

Risk index

1.0 PureTech

High risk · 2 serious faults

Risk index

BMW B58

Moderate risk · 1 serious fault

Lower risk

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

Reviewed on 9 October 202615 sources How we work

Is the 1.0 PureTech reliable?

It is a simple naturally aspirated three-cylinder, but with two documented weak points: oil consumption through the piston rings, which Stellantis acknowledges across its entire production (2012-2016), and the oil-bath timing belt it shares with the 1.2. It is only recommended with a full service history, a consumption test and a checked belt.^[1][2][3][4]

See the 2 of the 1.0 PureTech faults

Is the BMW B58 reliable?

The B58 (3.0 turbo straight-six, since 2015) is considered robust and less troublesome than the N54/N55 it replaced, and the sources do not document widespread internal failures. The known faults are on the periphery: the plastic oil filter housing, crankcase ventilation, gaskets and coolant. On units built before 2021 there are also US reports of an oil pump with a plastic housing.^[5][6][7][8]

See the 6 of the BMW B58 faults

Side-by-side comparison

Comparison of 1.0 PureTech and BMW B58
Item	1.0 PureTech	BMW B58
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	999 cm³	2,998 cm³
Timing	Wet belt (belt-in-oil)	Chain
Power	68 hp	290–441 hp
Production	2012–2016^{[2][3][9][10]}	since 2015^[11][12]
Reliability
Risk index (what is it?)	57High risk	38Moderate risk
Documented faults	2	6
Of high or critical severity	2	1
Worst severity	Critical severity	High severity
Main faults	High severity: Excessive oil consumption through the piston rings Critical severity: Degradation of the oil-bath timing belt	High severity: Failure of the oil pump with a plastic rotor housing Medium severity: Oil and coolant leak from the plastic oil filter housing Medium severity: Failure of the crankcase ventilation PCV valve (integrated in the valve cover)
Most expensive documented repair	up to €1,200Degradation of the oil-bath timing beltPublished figure^[13][14]	No reliable data
Which versions to buy
BuyRecommended versions	None	B58TU2 381 hp (B58B30M2, since 2022)^[6][7]
With cautionVersions to be cautious about	1.0 VTi / PureTech 68 (EB0, 2012-2016)^{[1][2][4][13]}	B58 326 hp (B58B30M0, 2015-2019)^[6][7][15] B58 340-360 hp (B58B30M0, 2016-2019)^[6][7][15] B58TU 333-340 hp (B58B30M1, since 2018)^[6][7] B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)^[7]
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

1.0 PureTech

BMW B58

See the 11 models with the BMW B58

Other comparisons

With the 1.0 PureTech

With the BMW B58

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Sources

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

1.Citroën, DS, Opel, Peugeot 1.2 PureTech. Nouvelle prise en charge pour la consommation d'huileL'argus · Motoring press · published 30 March 2024 · consulted 26 September 2026 · in French
2.Moteur EBWikipédia · Other source · consulted 26 September 2026 · in French
3.PSA inaugure son « trois-pattes »L'argus · Motoring press · published 28 December 2011 · consulted 26 September 2026 · in French
4.Moteurs PureTech - Stellantis prend a minima ses responsabilitésUFC-Que Choisir · Consumer association · published 18 January 2025 · consulted 26 September 2026 · in French
5.The 5 Most Common BMW B58 Engine ProblemsBMW Tuning · Technical documentation · published 7 February 2020 · consulted 9 October 2026
6.BMW B58 EngineFCP Euro · Technical documentation · consulted 9 October 2026
7.The Popular BMW B58 Inline-Six Engine Has One Big Achilles HeelThe Autopian · Motoring press · published 14 June 2024 · consulted 9 October 2026
8.¿En qué se diferencian los motores B58 y S58 de BMW?Diariomotor · Motoring press · published 27 April 2024 · consulted 9 October 2026 · in Spanish
9.Peugeot 208 5p Access 1.0 PureTech 68 (2012-2015): precio y ficha técnicakm77 · Technical documentation · consulted 26 September 2026 · in Spanish
10.Prueba de consumo (126): Peugeot 208 1.0-VTi 68 CVkm77 · Motoring press · published 5 August 2013 · consulted 26 September 2026 · in Spanish
11.BMW B58Wikipedia (inglés) · Other source · consulted 9 October 2026
12.BMW B58Wikipedia (alemán) · Other source · consulted 9 October 2026 · in German
13.1.2 PureTech: precio y cambio de correa de distribuciónAutopista · Motoring press · published 2 August 2026 · consulted 26 September 2026 · in Spanish
14.Motor ZMZ EB0 Citroën Peugeot C3 II 208 I 1.0 VTi 68 CV usado y reconstruidoFair Motors · Technical documentation · consulted 26 September 2026 · in Spanish
15.How A Plastic Part On BMW's B58 Engine Can Turn An Oil Change Into A $3,000 RepairThe Autopian · Motoring press · published 28 March 2025 · consulted 9 October 2026