1.6 CRDi vs BMW M47: which engine is more reliable?

According to our risk index, the 1.6 CRDi carries less risk than the BMW M47: 70/100 (high risk) versus 79/100 (very high risk). The 1.6 CRDi has 4 documented serious faults, the main one being «MHSG belt tensioner and crankshaft pulley failure (48V mild hybrid)»; the BMW M47 has 3 documented serious faults, the main one being «Intake swirl flap breakage (swirl flaps)».

Risk index

1.6 CRDi

High risk · 4 serious faults

Lower risk

Risk index

BMW M47

Very 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 27 September 202619 sources How we work

Is the 1.6 CRDi reliable?

The U2 D4FB (2009-2018) is a generally robust diesel if well maintained, with known turbo failures in the early units and timing chain problems from 120,000-150,000 km. Its successor, the Smartstream (U3 D4FE, from 2018), has a good reputation, except in the 48V mild hybrid version, which has a belt tensioner and crankshaft pulley fault that can destroy the engine.^[1][2][3]

See the 6 of the 1.6 CRDi faults

Is the BMW M47 reliable?

The BMW M47 (1998-2007, a 4-cylinder diesel fitted to the 3 Series E46/E90, 1 Series E87, 5 Series E60, X3 E83, the Rover 75 and the Land Rover Freelander) is solid in its basic mechanicals, but the common rail versions, built since 2001, carry a serious and well-documented problem: the intake manifold swirl flaps can break and enter the cylinder, with a risk of engine damage. The turbo and injectors also account for known faults.^[4][5][6][7]

See the 6 of the BMW M47 faults

Side-by-side comparison

Comparison of 1.6 CRDi and BMW M47
Item	1.6 CRDi	BMW M47
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,582 cm³	1,995 cm³
Timing	Chain	Chain
Power	90–136 hp	116–163 hp
Production	since 2009^{[1][8][9][10]}	1998–2007^{[4][5][11][12]}
Reliability
Risk index (what is it?)	70High risk	79Very high risk
Documented faults	6	6
Of high or critical severity	4	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: MHSG belt tensioner and crankshaft pulley failure (48V mild hybrid) Critical severity: Timing chain stretch High severity: Premature variable-geometry turbo (VGT) failure	Critical severity: Intake swirl flap breakage (swirl flaps) High severity: Loss of power and turbo faults Medium severity: Blocked and seized injectors
Most expensive documented repair	up to €1,800Particulate filter (DPF) blocked in urban usePublished figure^[13]	up to €300Faulty air flow meter on the BMW M47 (loss of power)Published figure^[14]
Which versions to buy
BuyRecommended versions	Smartstream 1.6 CRDi U3 (D4FE, 115-136 hp, without mild hybrid, from 2018)^[2][15]	M47D20 116-136 hp (1998-2001)^[4][6]
With cautionVersions to be cautious about	1.6 CRDi U2 (D4FB, 90-136 hp, sold in Spain from 2010 to ~2018)^[1][16][17] Smartstream 1.6 CRDi 48V mild hybrid (D4FE MHEV, 136 hp, from ~2019)^[3][18]	M47D20TU 116-150 hp (2001-2004)^[4][6][7] M47D20TU2 122-163 hp (2004-2007)^[4] M47R 116-131 hp (Rover 75, MG ZT and Land Rover Freelander, 1998-2006)^[4][19]
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

1.6 CRDi

See the 17 models with the 1.6 CRDi

BMW M47

See the 8 models with the BMW M47

Other comparisons

With the 1.6 CRDi

With the BMW M47

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.

Motor Kia y Hyundai 1.6 CRDI (D4FB): ficha tecnica, problemas y tuningMotordinámico · Technical documentation · consulted 26 September 2026 · in Spanish
Kia Ceed III: Bekannte Probleme & RückrufeGebrauchtwagenberater · Other source · consulted 26 September 2026 · in German
Kia / Hyundai 1.6 CRDi MHEV Engine FailuresDOHC (especialista en reconstrucción de motores) · Technical documentation · consulted 26 September 2026
BMW M47Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW M47D20 engine specifications, problems and reliabilityBimmerPulse · Technical documentation · consulted 27 September 2026
Motor BMW M47: problemas y averíasDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
BMW 3er E46: typische Probleme und SchwachstellenGebrauchtwagenberater · Technical documentation · consulted 27 September 2026 · in German
Hyundai U engineWikipedia · Other source · consulted 26 September 2026
Hyundai Smartstream engineWikipedia · Other source · consulted 26 September 2026
Hyundai i30 Kombi 1.6 CRDi 48V-Mildhybrid Trend (10/20-01/22): Technische Daten, Bilder, PreiseADAC · Technical documentation · consulted 26 September 2026 · in German
BMW M47Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
BMW 3 Series (E46)Wikipedia (inglés) · Other source · consulted 27 September 2026
Kia Ceed 1.6 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 26 September 2026 · in Spanish
Caudalímetro o sensor MAF: qué es, cómo funciona y cuáles son las averías más frecuentesDiariomotor · Motoring press · consulted 30 October 2026 · in Spanish
Kia Ceed im TÜV-Check 2026: Schwachstellen, Mängel und ProblemeAUTO BILD · Motoring press · published 2026 · consulted 26 September 2026 · in German
Kia and Hyundai 1.6 CRDI (D4FB) engineEngineDNA · Other source · consulted 26 September 2026
Best Hyundai Kia 1.6 CRDI Mods & Upgrades Guide to D4FB TuningTorqueCars · Other source · consulted 26 September 2026
KIA SPORTAGE 2023 - vehicle recallsGOV.UK (Driver and Vehicle Standards Agency) · Official body · consulted 26 September 2026
Rover 75Wikipedia (inglés) · Other source · consulted 27 September 2026