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Porsche MA1 / 9A1 vs 1.0 and 1.4 Boosterjet: which engine is more reliable?

According to our risk index, the 1.0 and 1.4 Boosterjet carries less risk than the Porsche MA1 / 9A1: 6/100 (low risk) versus 25/100 (moderate risk). The Porsche MA1 / 9A1 has 1 documented serious fault, the main one being «Bore scoring in the MA1 of the 997.2 and 987.2: uncommon, but documented»; the 1.0 and 1.4 Boosterjet has no documented serious faults.

Risk index

Porsche MA1 / 9A1

25

Moderate risk · 1 serious fault

Risk index

1.0 and 1.4 Boosterjet

6

Low risk · 0 serious faults

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 Porsche MA1 / 9A1 reliable?

Yes, it is noticeably more reliable than the M96/M97: it eliminated the intermediate shaft with its IMS bearing and, according to FCP Euro, the connecting rod bolt failures. What is documented is minor: carbon build-up on the intake valves caused by direct injection, coolant pump leaks on the 991.1 and, rarely, bore scoring on the 997.2.[1][2][3][4]

See the 3 of the Porsche MA1 / 9A1 faults

Is the 1.0 and 1.4 Boosterjet reliable?

The Suzuki Boosterjet (1.0 K10C and 1.4 K14C/K14D) is a turbocharged direct-injection petrol engine with a timing chain, fitted since 2015 to the Vitara, S-Cross, Swift Sport and Baleno, with a 48 V mild-hybrid variant of the 1.4 since 2020. German TÜV inspection reports and the workshops we consulted rate its reliability as high: no widespread fault with the chain, oil, fuel pump or mild-hybrid system is documented.[5][6][7][8][9]

See the 4 of the 1.0 and 1.4 Boosterjet faults

Side-by-side comparison

Comparison of Porsche MA1 / 9A1 and 1.0 and 1.4 Boosterjet
Porsche MA1 / 9A11.0 and 1.4 Boosterjet
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingChainChain
Power255–400 hp110–140 hp
Production2009–2016[1][4][10][11][12][13][14]since 2015[5][15][16][17]
Reliability
Risk index (what is it?)25Moderate risk6Low risk
Documented faults34
Of high or critical severity10
Worst severityCritical severityLow severity
Main faults
  1. Critical severity: Bore scoring in the MA1 of the 997.2 and 987.2: uncommon, but documented
  2. Medium severity: Carbon build-up on the intake valves caused by direct injection
  3. Medium severity: Leaks from the electronically controlled coolant pumps of the 991.1 and the plastic water pump
  1. Low severity: Timing chain: no documented pattern of failures
  2. Low severity: Oil consumption: no documented pattern
  3. Low severity: Direct injection and fuel pump: no documented faults or recalls
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 3.6 Carrera 345 hp (MA1.02, 2009-2012)[1][3][4]
  • 3.8 Carrera S 385 hp (MA1.01, 2009-2012)[3][4]
  • 2.9 Boxster/Cayman 255-265 hp (MA1.20, 2009-2012, no direct injection)[2][10]
  • 1.0 Boosterjet 110-112 hp (K10C, three-cylinder, 2015-present)[6][7][18][19]
  • 1.4 Boosterjet 140 hp (K14C, non-hybrid, 2015-2020 in Europe)[6][7][20]
  • 1.4 Boosterjet Mild Hybrid 129 hp (K14D, 48V SHVS, since 2020)[16][17]
With cautionVersions to be cautious about
  • 3.4 Boxster S / Cayman S 310-320 hp (MA1.21/.22, 2009-2012, direct injection)[2][21]
  • 3.4 Carrera 350 hp (MA1.04, 2011-2015)[3]
  • 3.8 Carrera S 400 hp (MA1.03, 2011-2015)[3]
  • 2.7 Boxster/Cayman 265-275 hp (MA1.22, 2012-2016)[21][22]
  • 3.4 Boxster S / Cayman S / GTS 315-340 hp (MA1.23, 2012-2016)[21][22]
None
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

Porsche MA1 / 9A1

1.0 and 1.4 Boosterjet

See the 12 models with the 1.0 and 1.4 Boosterjet

Other comparisons

With the Porsche MA1 / 9A1

With the 1.0 and 1.4 Boosterjet

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. The Definitive Guide To Porsche 997 Engines (M96.05, M97, MA1)FCP Euro · Other source · published 16 January 2024 · consulted 2 November 2026
  2. Porsche 987: The Cayman and Boxster Generation GuideRenn Driver · Other source · published 1 November 2026 · consulted 2 November 2026
  3. Porsche 911: 5 Generationen im Gebrauchtwagen-CheckAUTO BILD · Motoring press · published 22 September 2026 · consulted 2 November 2026 · in German
  4. Porsche 997Wikipedia · Other source · consulted 2 November 2026
  5. Suzuki K engineWikipedia · Other source · consulted 27 September 2026
  6. Gebrauchtwagen-Check: Grundsätzlich gut: Der Suzuki Vitara beim TÜVVolksstimme (dpa) · General press · published January 2026 · consulted 27 September 2026 · in German
  7. Suzuki Swift als Gebrauchtwagen: Diese Punkte beanstandet der TÜV häufigT-Online · General press · published October 2025 · consulted 27 September 2026 · in German
  8. Los mecánicos recomiendan el Suzuki Vitara porque no presume de moderno, sino de sencillo y baratoEl Nacional · General press · published September 2026 · consulted 27 September 2026 · in Spanish
  9. Test complet Suzuki VitaraFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  10. Porsche Boxster and Cayman (987)Wikipedia · Other source · consulted 2 November 2026
  11. Porsche 991Wikipedia · Other source · consulted 2 November 2026
  12. Porsche Boxster and Cayman (981)Wikipedia · Other source · consulted 2 November 2026
  13. Differences between M96 and M97 enginesFlat Six Innovations · Other source · published 25 November 2025 · consulted 2 November 2026
  14. List of Porsche enginesWikipedia · Other source · consulted 2 November 2026
  15. Suzuki motor KWikipedia · Other source · consulted 27 September 2026 · in Spanish
  16. Suzuki Swift Sport, Vitara y S-Cross: nuevas versiones micro-híbridas de 48VAutopista.es · Motoring press · published 16 December 2019 · consulted 27 September 2026 · in Spanish
  17. Suzuki S-Cross 1.4 Boosterjet Mild Hybrid 2020: precios y datos del nuevo SUVAutopista.es · Motoring press · published 12 March 2020 · consulted 27 September 2026 · in Spanish
  18. Suzuki Vitara : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  19. Suzuki Swift 3 : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  20. Prueba Suzuki Swift Sport 1.4 Boosterjet 140 CVActualidad Motor · Motoring press · published 16 May 2018 · consulted 27 September 2026 · in Spanish
  21. Porsche Cayman and Boxster Common Problems: A Specialist Field GuideForeign Automotive · Other source · consulted 2 November 2026
  22. Porsche 981: The Cayman and Boxster Generation GuideRenn Driver · Other source · consulted 2 November 2026