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BMW B48 / B38 vs 1.3, 1.5 and 1.6 gasolina (serie M): which engine is more reliable?

According to our risk index, the BMW B48 / B38 carries less risk than the 1.3, 1.5 and 1.6 gasolina (serie M): 24/100 (low risk) versus 27/100 (moderate risk). The BMW B48 / B38 has 1 documented serious fault, the main one being «Timing chain on the early units (2014-2018), redesigned in the B48TU»; the 1.3, 1.5 and 1.6 gasolina (serie M) has no documented serious faults.

Risk index

BMW B48 / B38

24

Low risk · 1 serious fault

Lower risk

Risk index

1.3, 1.5 and 1.6 gasolina (serie M)

27

Moderate risk · 0 serious faults

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

17 sourcesHow we work

Is the BMW B48 / B38 reliable?

The BMW B48 (2.0 turbo, from 2014) and its three-cylinder sibling, the B38 (1.5), have a reputation as reliable engines within BMW's modern range: there is no serious, widespread fault on record, unlike the timing chain on the N47 diesel or the EGR fire risk on the B47. Keep an eye on the cooling circuit, the oil seals near the turbo and the VANOS, and the carbon build-up typical of direct injection; BMW revised the timing chain in 2018 (B48TU update).[1][2][3]

See the 4 of the BMW B48 / B38 faults

Is the 1.3, 1.5 and 1.6 gasolina (serie M) reliable?

Suzuki's M series (the 1.3-litre M13A, 1.5-litre M15A and 1.6-litre M16A, with a timing chain and indirect injection) has a reputation as a simple, reliable engine: we have found no documented serious fault in the block or the chain. What is on record are minor faults or one-off campaigns: the catalytic converter and lambda sensors of the 2005-2010 Swift, the catalytic converter of the 2006-2007 SX4, the Swift's fuel hose and the Grand Vitara and Jimny tensioner pulley.[4][5][6][7][8][9]

See the 4 of the 1.3, 1.5 and 1.6 gasolina (serie M) faults

Side-by-side comparison

Comparison of BMW B48 / B38 and 1.3, 1.5 and 1.6 gasolina (serie M)
BMW B48 / B381.3, 1.5 and 1.6 gasolina (serie M)
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,998 cm³—
TimingChainChain
Power136–312 hp83–136 hp
Productionsince 2014[1][10][11]since 1999[4][5][12]
Reliability
Risk index (what is it?)24Low risk27Moderate risk
Documented faults44
Of high or critical severity10
Worst severityHigh severityMedium severity
Main faults
  1. Medium severity: Deterioration of hoses and seals in the cooling circuit, with coolant loss
  2. Medium severity: Oil leaks or seepage from seals and covers, near the turbo and the VANOS
  3. High severity: Timing chain on the early units (2014-2018), redesigned in the B48TU
  1. Medium severity: Faulty catalytic converter and lambda sensors on the 2005-2010 Swift (engine warning light)
  2. Medium severity: Accessory belt tensioner pulley on the Grand Vitara 1.6 and Jimny 1.3 (2010 campaign)
  3. Medium severity: Fuel hose damaged by rubbing on the Swift 1.3 and 1.5 (2005-2008)
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • B38 1.5 136 hp (MINI Cooper, 118i)[2]
  • B48 2.0 178-197 hp (120i, 220i, 320i, 520i, X1/X2/X3 20i, MINI Cooper S)[2]
  • B48 2.0 252-258 hp (330i, 530i, X3/X4 xDrive30i)[2][13]
  • B48 2.0 up to 302-312 hp, high performance (MINI John Cooper Works, BMW X1 M35i)[2]
  • 1.3 M13A 83-92 CV (Swift, Ignis and Jimny, 2003-2018)[5][6][9]
  • 1.5 M15A 99-109 CV (Swift, SX4 and Ignis, 2003-2012)[7][14]
  • 1.6 M16A 120-136 CV (SX4, Sedici, S-Cross, Vitara and Swift Sport, 2009-2018)[15][16][17]
With cautionVersions to be cautious aboutNone
  • 1.6 M16A 107-125 CV (Swift Sport, SX4, Sedici and Grand Vitara, 2005-2009)[5][6][7]
AvoidVersions to avoidNoneNone

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 B48 / B38

See the 17 models with the BMW B48 / B38

1.3, 1.5 and 1.6 gasolina (serie M)

See the 9 models with the 1.3, 1.5 and 1.6 gasolina (serie M)

Other comparisons

With the BMW B48 / B38

With the 1.3, 1.5 and 1.6 gasolina (serie M)

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.

  1. BMW B48Wikipedia (inglés) · Other source · consulted 27 September 2026
  2. Motor BMW B48: defectos, mantenimiento y guía de compraRecambios y Accesorios BMW (blog) · Technical documentation · consulted 27 September 2026 · in Spanish
  3. BMW Reliability Has Changed, But the Internet Hasn't Caught UpBMWBLOG · Other source · published January 2026 · consulted 27 September 2026
  4. Suzuki M engineWikipedia · Other source · consulted 8 October 2026
  5. Suzuki Swift MK4 MZ 2005-2010: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
  6. Fiabilité et pannes Suzuki Swift (2005-2010)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
  7. Rückruf Suzuki SX4AUTO BILD · Motoring press · published 7 April 2008 · consulted 8 October 2026 · in German
  8. DVSA – base de llamadas a revisiónDVSA (Reino Unido) · Official body · consulted 8 October 2026
  9. Por 7.000 € puedes tener un Suzuki Jimny: guía de segunda manoDiariomotor · Motoring press · published 10 January 2024 · consulted 8 October 2026 · in Spanish
  10. BMW B38Wikipedia (inglés) · Other source · consulted 27 September 2026
  11. BMW B48Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  12. Suzuki SX4 1.6 VVT 4x2 GL (2010-2012): datoskm77.com · Motoring press · consulted 8 October 2026 · in Spanish
  13. 5 BMWs That Prove the B48 Four-Cylinder Engine Is Better Than You ThinkBMWBLOG · Other source · published April 2026 · consulted 27 September 2026
  14. Suzuki SX4: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
  15. Suzuki Vitara (ab 2015): Bekannte Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
  16. Suzuki SX4 S-Cross JY 2013-2021: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
  17. Fiabilité et pannes Suzuki Swift 2 (2010-2017)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French