Audi 3.0 TFSI V6 vs BMW B58: which engine is more reliable?

According to our risk index, the Audi 3.0 TFSI V6 carries less risk than the BMW B58: 36/100 versus 38/100 (both moderate risk). The Audi 3.0 TFSI V6 has 2 documented serious faults, the main one being «Timing chain stretch and tensioner wear»; the BMW B58 has 1 documented serious fault, the main one being «Failure of the oil pump with a plastic rotor housing».

Risk index

Audi 3.0 TFSI V6

Moderate risk · 2 serious faults

Lower risk

Risk index

BMW B58

Moderate risk · 1 serious fault

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

Reviewed on 9 October 202620 sources How we work

Is the Audi 3.0 TFSI V6 reliable?

The supercharged 3.0 TFSI (EA837, 2008-2018) has a reputation for reliability: Gebrauchtwagenberater sees no known problems in the A6 C7. What is documented is limited: thermostat and water pump leaks, a fuel rail recall campaign, chain wear in the first units, and carbon build-up. The turbocharged EA839 (from 2016) has no documented faults of its own yet.^{[1][2][3][4][5][6]}

See the 5 of the Audi 3.0 TFSI V6 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.^{[7][8][9][10]}

See the 6 of the BMW B58 faults

Side-by-side comparison

Comparison of Audi 3.0 TFSI V6 and BMW B58
Item	Audi 3.0 TFSI V6	BMW B58
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	2,995 cm³	2,998 cm³
Timing	Chain	Chain
Power	272–450 hp	290–441 hp
Production	since 2008^{[11][12][13][14]}	since 2015^[15][16]
Reliability
Risk index (what is it?)	36Moderate risk	38Moderate risk
Documented faults	5	6
Of high or critical severity	2	1
Worst severity	High severity	High severity
Main faults	High severity: Timing chain stretch and tensioner wear High severity: Fuel leak at the injection rails (2015 and 2019 campaigns) Medium severity: Leak at the thermostat housing and water pump	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	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	3.0 TFSI turbo (EA839: CZSE, DR, CWGD; 2016 onwards)^[6] 2.9 TFSI twin-turbo (EA839: DECA, DKMB; 2016 onwards)^[6][11]	B58TU2 381 hp (B58B30M2, since 2022)^[8][9]
With cautionVersions to be cautious about	3.0 TFSI 290 hp supercharged (CAJA, CGWA; 2008-2013)^[1][5][17] 3.0 TFSI 300/310 hp supercharged (CGWB, CGWD, CGXB, CTUA; 2010-2014)^[3][5][18] 3.0 TFSI 333 hp supercharged, direct injection (CAKA, CJTB, CTWA, CTUB; 2008-2015)^[2][3][17] 3.0 TFSI 333 hp evo supercharged with combined injection (CREC; 2014-2018)^{[4][5][18][19]} 3.0 TFSI 272 hp supercharged (CTUC, CTVA, CMUA, CJTC; 2010-2017)^[2] SQ5 3.0 TFSI 354 hp supercharged (2013-2017)^[2]	B58 326 hp (B58B30M0, 2015-2019)^[8][9][20] B58 340-360 hp (B58B30M0, 2016-2019)^[8][9][20] B58TU 333-340 hp (B58B30M1, since 2018)^[8][9] B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)^[9]
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

Audi 3.0 TFSI V6

See the 19 models with the Audi 3.0 TFSI V6

BMW B58

See the 15 models with the BMW B58

Other comparisons

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Sources

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

Audi A6 C7 4G 2011-2018 Probleme und SchwachstellenGebrauchtwagenberater · Motoring press · consulted 9 October 2026 · in German
Audi Q5: Probleme und SchwachstellenGebrauchtwagenberater · Motoring press · consulted 9 October 2026 · in German
Undichtigkeit im Einspritzsystem: Audi-Rückruf läuft bereitsÖAMTC · Consumer association · consulted 9 October 2026 · in German
Audi: Ersatz des KraftstoffverteilersÖAMTC · Consumer association · published 19 February 2019 · consulted 9 October 2026 · in German
Audi A6 C7: typische Probleme und Diagnose mit ODISKfz-Meisterbetrieb Dietrich (blog de taller) · Other source · consulted 9 October 2026 · in German
Audi A6 C8: Probleme und SchwachstellenGebrauchtwagenberater · Motoring press · consulted 9 October 2026 · in German
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
List of Volkswagen Group petrol engines (EA837 y EA839)Wikipedia (inglés) · Other source · consulted 9 October 2026
Audi Técnica Motor 3.0 TFSI (2008)km77.com · Motoring press · consulted 9 October 2026 · in Spanish
Audi 3.0 TFSIAUTO BILD · Motoring press · published 27 June 2008 · consulted 9 October 2026 · in German
Used Audi A4 buying guide 2008-2015 (Mk4)Carbuyer · Motoring press · published 7 February 2019 · consulted 9 October 2026
BMW B58Wikipedia (inglés) · Other source · consulted 9 October 2026
BMW B58Wikipedia (alemán) · Other source · consulted 9 October 2026 · in German
Gebrauchter Audi A6 und S6 C7 ZuverlässigkeitsleitfadenEuro Premium Parts (blog de recambista) · Other source · published 29 November 2025 · consulted 9 October 2026 · in German
DVSA – base de llamadas a revisión (R/2015/031 y R/2019/099)DVSA (Reino Unido) · Other source · consulted 9 October 2026
Audi A6 berlina 3.0 TFSI 333 CV quattro S tronic 7 vel. (2014-2017)km77.com · Motoring press · consulted 9 October 2026 · in Spanish
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