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1.2 and 1.4 TSI vs BMW B48 / B38: which engine is more reliable?

According to our risk index, the BMW B48 / B38 carries less risk than the 1.2 and 1.4 TSI: 24/100 (low risk) versus 84/100 (very high risk). The 1.2 and 1.4 TSI has 3 documented serious faults, the main one being «Timing chain stretch and tensioner failure (EA111)»; 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».

Risk index

1.2 and 1.4 TSI

84

Very high risk · 3 serious faults

Risk index

BMW B48 / B38

24

Low risk · 1 serious fault

Lower risk

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

22 sourcesHow we work

Is the 1.2 and 1.4 TSI reliable?

It depends on the generation. The chain-driven 1.2 and 1.4 TSI EA111 engines (2006-2015) carry a recognised problem of chain stretch and tensioner failure, and the 1.4 twincharger engines from before 2012 can break pistons. The belt-driven EA211 engines (from 2012) are considerably more reliable: their typical fault is a leaking water pump.[1][2][3][4][5]

See the 5 of the 1.2 and 1.4 TSI faults

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).[6][7][8]

See the 4 of the BMW B48 / B38 faults

Side-by-side comparison

Comparison of 1.2 and 1.4 TSI and BMW B48 / B38
1.2 and 1.4 TSIBMW B48 / B38
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement—1,998 cm³
TimingChainChain
Power85–185 hp136–312 hp
Productionsince 2006[9][10][11][12][13]since 2014[6][14][15]
Reliability
Risk index (what is it?)84Very high risk24Low risk
Documented faults54
Of high or critical severity31
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Timing chain stretch and tensioner failure (EA111)
  2. Critical severity: Piston breakage and oil consumption in the 1.4 TSI twincharger
  3. Medium severity: Water pump and thermostat housing leak (EA211)
  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
Most expensive documented repairup to €1,400Timing chain stretch and tensioner failure (EA111)Published figure[16][17]No reliable data
Which versions to buy
BuyRecommended versions
  • 1.2 TSI 86-110 hp (EA211, CJZA/CJZB/CJZC/CJZD, CYVA/CYVB, 2012-2019)[3][18]
  • 1.4 TSI 122-150 hp (EA211, incl. ACT/COD; CMBA, CXSA, CZCA, CHPA, CPTA, CZDA, CZEA…, from 2012)[3][5]
  • B38 1.5 136 hp (MINI Cooper, 118i)[7]
  • B48 2.0 178-197 hp (120i, 220i, 320i, 520i, X1/X2/X3 20i, MINI Cooper S)[7]
  • B48 2.0 252-258 hp (330i, 530i, X3/X4 xDrive30i)[7][19]
  • B48 2.0 up to 302-312 hp, high performance (MINI John Cooper Works, BMW X1 M35i)[7]
With cautionVersions to be cautious about
  • 1.2 TSI 86/90/105 hp (EA111, CBZA/CBZC/CBZB, 2009-2015)[2][20]
  • 1.4 TSI twincharger revised 160-185 hp (EA111, CTHD/CTHE/CTHG, from 2012)[2][4]
  • 1.4 TSI 122/125 hp (EA111, CAXA/CAXC, from 2007)[2][21]
None
AvoidVersions to avoid
  • 1.4 TSI twincharger 140-185 hp (EA111, BMY/BLG/CAVD/CAVE…, 2006-2012)[2][4][22]
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

1.2 and 1.4 TSI

See the 34 models with the 1.2 and 1.4 TSI

BMW B48 / B38

See the 20 models with the BMW B48 / B38

Other comparisons

With the 1.2 and 1.4 TSI

With the BMW B48 / B38

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. VW 1.2 TSI & 1.4 TSI Steuerkette: VW kassiert Kulanz-VersprechenAUTO BILD · Motoring press · published 1 June 2018 · consulted 26 September 2026 · in German
  2. Probleme und Schwachstellen beim 1.2 TSI, 1.4 TSI (EA111)Gebrauchtwagenberater · Other source · published 1 September 2026 · consulted 26 September 2026 · in German
  3. VW EA211: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Other source · published 26 August 2026 · consulted 26 September 2026 · in German
  4. Volkswagen CAVD 1.4 Litre TSI Engine ProblemsGrant Walker (taller, Australia) · Other source · published 28 June 2018 · consulted 26 September 2026
  5. VW Golf 7: Probleme, Mängel & Schwachstellencarwiki.de · Other source · consulted 26 September 2026 · in German
  6. BMW B48Wikipedia (inglés) · Other source · consulted 27 September 2026
  7. Motor BMW B48: defectos, mantenimiento y guía de compraRecambios y Accesorios BMW (blog) · Technical documentation · consulted 27 September 2026 · in Spanish
  8. BMW Reliability Has Changed, But the Internet Hasn't Caught UpBMWBLOG · Other source · published January 2026 · consulted 27 September 2026
  9. Self-Study Programme 359: 1.4l TSI Engine with Dual-chargingVolkswagen AG (copia alojada en volkspage.net) · Manufacturer · published March 2006 · consulted 26 September 2026
  10. Volkswagen EA111 engine (1.2 TSI/TFSI)Wikipedia · Other source · consulted 26 September 2026
  11. Volkswagen EA211 engineWikipedia · Other source · consulted 26 September 2026
  12. Audi A1Wikipedia · Other source · consulted 26 September 2026
  13. International Driving Presentation of the new Polo BlueGTVolkswagen Newsroom · Manufacturer · published 2 July 2012 · consulted 26 September 2026
  14. BMW B38Wikipedia (inglés) · Other source · consulted 27 September 2026
  15. BMW B48Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  16. Coste de cambiar la cadena de distribución: guía VW Audi TSISkanyx · Other source · published 25 June 2026 · consulted 26 September 2026 · in Spanish
  17. Problemas en la cadena de distribución: casos y costeGT Autos (Málaga) · Other source · published 22 December 2025 · consulted 26 September 2026 · in Spanish
  18. VW: Austritt von Motoröl möglichautoservicepraxis.de · Motoring press · published 16 August 2019 · consulted 26 September 2026 · in German
  19. 5 BMWs That Prove the B48 Four-Cylinder Engine Is Better Than You ThinkBMWBLOG · Other source · published April 2026 · consulted 27 September 2026
  20. Bei älteren VW 1.2 TSi-Motoren: Gefahr einer Längung der Steuerkettefebi bilstein (blog técnico) · Technical documentation · published 28 January 2022 · consulted 26 September 2026 · in German
  21. ADAC Pannenstatistik 2019 (anexo: defectos por encima de la media por modelo)ADAC e.V. · Reliability study · published 2019 · consulted 26 September 2026 · in German
  22. Bulletin – Volkswagen 1.4 Piston FailureSouthside Cylinder Heads (taller, Australia) · Other source · published 6 December 2017 · consulted 26 September 2026