BMW B58 vs BMW N62 / N63: which engine is more reliable?

According to our risk index, the BMW B58 carries less risk than the BMW N62 / N63: 38/100 (moderate risk) versus 54/100 (high risk). The BMW B58 has 1 documented serious fault, the main one being «Failure of the oil pump with a plastic rotor housing»; the BMW N62 / N63 has 3 documented serious faults, the main one being «N63 oil consumption from worn valve stem seals».

Risk index

BMW B58

Moderate risk · 1 serious fault

Lower risk

Risk index

BMW N62 / N63

High risk · 3 serious faults

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

Reviewed on 9 October 202618 sources How we work

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.^[1][2][3][4]

See the 6 of the BMW B58 faults

Is the BMW N62 / N63 reliable?

The N62 (naturally aspirated V8, 2001-2010) is considered a solid engine, with the coolant hoses and valve stem seals as points to watch. The N63 (twin-turbo V8, since 2008) has a worse reputation: oil consumption from the seals, the timing chain and coolant loss; the post-July 2013 N63TU is considered more reliable.^{[5][6][7][8][9]}

See the 6 of the BMW N62 / N63 faults

Side-by-side comparison

Comparison of BMW B58 and BMW N62 / N63
Item	BMW B58	BMW N62 / N63
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	2,998 cm³	—
Timing	Chain	Chain
Power	290–441 hp	272–450 hp
Production	since 2015^[10][11]	since 2001^{[7][12][13][14]}
Reliability
Risk index (what is it?)	38Moderate risk	54High risk
Documented faults	6	6
Of high or critical severity	1	3
Worst severity	High severity	Critical severity
Main faults	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)	High severity: N63 oil consumption from worn valve stem seals Critical severity: N63 timing chain stretch and guide breakage Critical severity: Additional turbo coolant pump with a risk of short circuit and fire
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	B58TU2 381 hp (B58B30M2, since 2022)^[2][3]	N62B48TU 4.8 naturally aspirated 355-367 hp (550i, 650i, 750i, X5 4.8i; 2005-2010)^[6][8]
With cautionVersions to be cautious about	B58 326 hp (B58B30M0, 2015-2019)^[2][3][15] B58 340-360 hp (B58B30M0, 2016-2019)^[2][3][15] B58TU 333-340 hp (B58B30M1, since 2018)^[2][3] B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)^[3]	N62B36 3.6 naturally aspirated 272 hp (735i, 2001-2005)^[5][8] N62B40 4.0 naturally aspirated 306 hp (540i and 740i, 2005-2010)^[5][9] N62B44 4.4 naturally aspirated 320-333 hp (545i, 645Ci, 745i, X5 4.4i; 2001-2006)^[5][9][16] N62B48 4.8 naturally aspirated 360 hp (X5 4.8is, 2004-2006)^[17] N63B44O1 (N63TU) 4.4 twin-turbo 450 hp (2013-2019)^[7]
AvoidVersions to avoid	None	N63B44O0 4.4 twin-turbo 408 hp (2008-2014)^[7][18]

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 B58

See the 16 models with the BMW B58

BMW N62 / N63

See the 12 models with the BMW N62 / N63

Other comparisons

With the BMW B58

With the BMW N62 / N63

Compare other engines

First engine

Second engine

That is the comparison you are viewing: change one of the two engines.

Sources

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

The 5 Most Common BMW B58 Engine ProblemsBMW Tuning · Technical documentation · published 7 February 2020 · consulted 9 October 2026
BMW B58 EngineFCP Euro · Technical documentation · consulted 9 October 2026
The Popular BMW B58 Inline-Six Engine Has One Big Achilles HeelThe Autopian · Motoring press · published 14 June 2024 · consulted 9 October 2026
¿En qué se diferencian los motores B58 y S58 de BMW?Diariomotor · Motoring press · published 27 April 2024 · consulted 9 October 2026 · in Spanish
BMW 5er E60, E61 – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 26 April 2024 · consulted 8 October 2026 · in German
BMW X5 E70 – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 5 January 2023 · consulted 8 October 2026 · in German
BMW 5er F10, F11: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
BMW 6er E63, E64 – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 5 January 2023 · consulted 8 October 2026 · in German
BMW 650i: Gebrauchtwagen-TestAUTO BILD · Motoring press · published 4 December 2015 · consulted 8 October 2026 · in German
BMW B58Wikipedia (inglés) · Other source · consulted 9 October 2026
BMW B58Wikipedia (alemán) · Other source · consulted 9 October 2026 · in German
BMW N62Wikipedia (inglés) · Other source · consulted 8 October 2026
BMW N63Wikipedia (inglés) · Other source · consulted 8 October 2026
BMW N62Wikipedia (alemán) · Other source · consulted 8 October 2026 · in German
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
BMW 745i (E65): Test über 100.000 kmAUTO ZEITUNG · Motoring press · published 12 January 2018 · consulted 8 October 2026 · in German
BMW X5 E53 – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 4 January 2023 · consulted 8 October 2026 · in German
Fiabilité Bmw Serie 5 (2010-2016) (252 témoignages)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French