BMW B58 vs Porsche V8 and V6 (Cayenne and Panamera): which engine is more reliable?

According to our risk index, the BMW B58 carries less risk than the Porsche V8 and V6 (Cayenne and Panamera): 38/100 (moderate risk) versus 55/100 (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 Porsche V8 and V6 (Cayenne and Panamera) has 5 documented serious faults, the main one being «Cracked plastic coolant pipes on the Cayenne V8».

Risk index

BMW B58

Moderate risk · 1 serious fault

Lower risk

Risk index

Porsche V8 and V6 (Cayenne and Panamera)

High risk · 5 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 202626 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 Porsche V8 and V6 (Cayenne and Panamera) reliable?

There are no public failure statistics for these engines. The sources agree on three points: the plastic coolant pipes of the first Cayenne V8s, cylinder bore scoring in the naturally aspirated 4.5, and the timing chain of the VR6 V6s. On the 4.8 and the Panamera, the camshaft adjuster bolts (a 2012 workshop campaign) and leaks weigh more.^{[5][6][7][8][9][10][11][12]}

See the 7 of the Porsche V8 and V6 (Cayenne and Panamera) faults

Side-by-side comparison

Comparison of BMW B58 and Porsche V8 and V6 (Cayenne and Panamera)
Item	BMW B58	Porsche V8 and V6 (Cayenne and Panamera)
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	2,998 cm³	—
Timing	Chain	Chain
Power	290–441 hp	250–570 hp
Production	since 2015^[13][14]	2002–2017^{[5][15][16][17]}
Reliability
Risk index (what is it?)	38Moderate risk	55High risk
Documented faults	6	7
Of high or critical severity	1	5
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: Cracked plastic coolant pipes on the Cayenne V8 High severity: Timing chain stretch on the Cayenne VR6 V6 engines Critical severity: Cylinder bore scoring in the Cayenne 4.5 V8 block
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	B58TU2 381 hp (B58B30M2, since 2022)^[2][3]	None
With cautionVersions to be cautious about	B58 326 hp (B58B30M0, 2015-2019)^[2][3][18] B58 340-360 hp (B58B30M0, 2016-2019)^[2][3][18] B58TU 333-340 hp (B58B30M1, since 2018)^[2][3] B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)^[3]	3.2 V6 VR6 250 hp (Cayenne I, 2004-2007)^[7][8][19] 3.6 V6 VR6 FSI 290 hp (Cayenne I, 2007-2010)^[7][8][20] 3.6 V6 VR6 300 hp (Cayenne II, 2010-2017)^[19][21] 4.5 V8 S 340 hp (M48.00, Cayenne I, 2002-2007)^[5][6][7][9] 4.5 V8 Turbo 450 hp and Turbo S 521 hp (M48.50, Cayenne I, 2002-2007)^[5][6][7][9] 4.8 V8 S 385 hp and GTS 405 hp (M48.01, Cayenne I, 2007-2010)^[7][8][20] 4.8 V8 Turbo 500 hp and Turbo S 550 hp (M48.51, Cayenne I, 2007-2010)^[20][22] 4.8 V8 S 400 hp, GTS 420 hp, Turbo 500/520 hp and Turbo S 550/570 hp (Cayenne II, 2010-2017)^{[10][11][21][23]} 3.6 V6 300/310 hp (Panamera and Panamera 4, 2010-2016)^{[10][15][24][25]} 4.8 V8 S, 4S and GTS 400-440 hp (M48.20, Panamera, 2009-2016)^[10][12][25] 4.8 V8 Turbo and Turbo S 500-570 hp (M48.70, Panamera, 2009-2016)^[10][25][26]
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 B58

See the 15 models with the BMW B58

Porsche V8 and V6 (Cayenne and Panamera)

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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
Porsche Cayenne (generaciones 955/957 y 958, motores y problemas conocidos)Wikipedia (inglés) · Other source · consulted 9 October 2026
Alusil (aleación de aluminio y silicio para cilindros)Wikipedia (inglés) · Other source · consulted 9 October 2026
Gebrauchtwagen-Kaufberater: Was kann der Porsche Cayenne 9PA?AutoScout24 · Motoring press · published 10 January 2022 · consulted 9 October 2026 · in German
Porsche Cayenne I 9PA - Probleme und KrankheitenGebrauchtwagenberater · Motoring press · consulted 9 October 2026 · in German
Buying, owning, improving the Porsche Cayenne 958Car Mechanics · Motoring press · published 24 September 2025 · consulted 9 October 2026
Part 573 Safety Recall Report 17V-368 (Porsche AH08, reguladores de los árboles de levas)NHTSA / Porsche Cars North America · Official body · published 21 February 2023 · consulted 9 October 2026
Amended Chronology For Recall AH08 (cronología de la campaña de los reguladores de levas)Porsche Cars North America (documento en NHTSA) · Manufacturer · published 20 July 2017 · consulted 9 October 2026
1st Gen Porsche Panamera Buyer's GuideStuttcars · Other source · consulted 9 October 2026
BMW B58Wikipedia (inglés) · Other source · consulted 9 October 2026
BMW B58Wikipedia (alemán) · Other source · consulted 9 October 2026 · in German
Porsche Panamera (primera generación, 970)Wikipedia (inglés) · Other source · consulted 9 October 2026
Porsche-Achtzylindermotoren: historia de los V8 de PorschePorsche Newsroom · Manufacturer · consulted 9 October 2026 · in German
Porsche V8 engines (familia M48)Wikipedia (inglés) · Other source · consulted 9 October 2026
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
Probleme mit dem Porsche Cayenne (9PA y 92A) inklusive RückrufaktionenCarWiki.de · Other source · consulted 9 October 2026 · in German
Fiabilité Porsche Cayenne (2002-2010): pannes et témoignagesfiches-auto.fr · Owners' forum · consulted 9 October 2026 · in French
Fiabilité Porsche Cayenne 2 (2010-2017): pannes et témoignagesfiches-auto.fr · Owners' forum · consulted 9 October 2026 · in French
Porsche Cayenne 4.8 500 ch 2012: moteur cassé, vis d'arbre à cames desserrée à 147.000 kmfiches-auto.fr · Owners' forum · published 9 May 2018 · consulted 9 October 2026 · in French
Porsche Cayenne Coolant Pipe Failure: Causes, Symptoms, and Repair CostsForeign Automotive (taller de Ontario, Canadá) · Other source · consulted 9 October 2026
Fiabilité Porsche Panamera (2009-2016): pannes et témoignagesfiches-auto.fr · Owners' forum · consulted 9 October 2026 · in French
970 Porsche Panamera Common ProblemsYOUCANIC · Other source · published 6 November 2024 · consulted 9 October 2026
DVSA – base de llamadas a revisiónDVSA (Reino Unido) · Official body · consulted 9 October 2026