BMW N57 vs 1.9 TDI: which engine is more reliable?

According to our risk index, the 1.9 TDI carries less risk than the BMW N57: 66/100 (high risk) versus 87/100 (very high risk). The BMW N57 has 3 documented serious faults, the main one being «EGR cooler leaks with risk of engine fire»; the 1.9 TDI has 3 documented serious faults, the main one being «Big-end bearing failure».

Risk index

BMW N57

Very high risk · 3 serious faults

Risk index

1.9 TDI

High risk · 3 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 27 September 202618 sources How we work

Is the BMW N57 reliable?

The BMW N57 (2008-2019, successor to the M57) is a six-cylinder diesel that is mechanically robust in the basics, but it shares with the N47 and B47 the EGR cooler covered by BMW's service campaign for engine fire risk, and it inherits from the N47 the timing chain at the rear of the block, with wear cases documented mainly from 200,000 km. Without a clear history of these checks, it is worth buying with some caution.^[1][2][3]

See the 4 of the BMW N57 faults

Is the 1.9 TDI reliable?

It depends a lot on the version. The rotary pump (1996-2003, codes ALH and AGR among others) has a reputation for great durability. The unit injector system (1999-2010) improves performance and emissions, but has more documented faults: dual-mass flywheel, turbo, EGR valve and, above all in the 105 hp version, cases of broken big-end bearings.^{[4][5][6][7][8][9][10]}

See the 6 of the 1.9 TDI faults

Side-by-side comparison

Comparison of BMW N57 and 1.9 TDI
Item	BMW N57	1.9 TDI
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,993 cm³	1,896 cm³
Timing	Chain	Timing belt (dry)
Power	204–381 hp	75–150 hp
Production	2008–2019^[1][11]	1996–2010^{[4][12][13][14][15]}
Reliability
Risk index (what is it?)	87Very high risk	66High risk
Documented faults	4	6
Of high or critical severity	3	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: EGR cooler leaks with risk of engine fire Critical severity: Rear timing chain wear High severity: Loss of thrust on twin-turbo versions due to the vacuum circuit or the actuator	Critical severity: Big-end bearing failure High severity: Seized or broken variable-geometry turbo Medium severity: EGR valve clogged with carbon
Most expensive documented repair	No reliable data	up to €1,500Premature wear of the dual-mass flywheel and clutchPublished figure^[16]
Which versions to buy
BuyRecommended versions	None	1.9 TDI rotary pump (VP37, 1996-2003)^[5]
With cautionVersions to be cautious about	N57D30 204-211 hp, single turbo (U0/UL, 2010-2013)^[3][17] N57D30 245-258 hp, single turbo (O0/O1, 2008-2019)^[3][17] N57D30 299-313 hp twin turbo (T0/T1, 2009-2019)^[17][18]	1.9 TDI high-performance unit injector (101-150 hp, 1999-2003)^[7][16] 1.9 TDI unit injector 75-105 hp (2003-2010)^[6][10]
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 N57

See the 10 models with the BMW N57

1.9 TDI

See the 28 models with the 1.9 TDI

Other comparisons

With the BMW N57

With the 1.9 TDI

Compare other engines

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Sources

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

BMW N57Wikipedia (inglés) · Other source · consulted 27 September 2026
Motor BMW B47 - Reparación EspecializadaDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
324.000 diésel de BMW tendrán que pasar por el taller en Europa, por un posible riesgo de incendio en la EGRDiariomotor · Motoring press · published 8 August 2018 · consulted 27 September 2026 · in Spanish
List of discontinued Volkswagen Group diesel enginesWikipedia (inglés) · Other source · consulted 27 September 2026
Les TDI sont-ils fiables ?fiches-auto.fr · Motoring press · published 15 December 2016 · consulted 27 September 2026 · in French
Tous les problèmes sur Volkswagen Golf Vfiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Volkswagen Passat (1996-2004)fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Volkswagen Passat (2004-2010)fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Škoda Octavia (1997-2004)fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Škoda Octavia (2004-2012)fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
BMW N57Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Volkswagen Golf IVWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Volkswagen Golf VWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Volkswagen TouranWikipedia (inglés) · Other source · consulted 27 September 2026
Volkswagen CaddyWikipedia (inglés) · Other source · consulted 27 September 2026
Tous les problèmes sur Volkswagen Golf IVfiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Motor BMW N57 - Reparación EspecializadaDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
Motor BMW N57: problemas, modelos y qué revisarCarexam · Motoring press · consulted 27 September 2026 · in Spanish