Skip to content
MotorFiable

M43 1.6, 1.8 and 1.9 vs 1.2 Dualjet and 1.2 VVT: which engine is more reliable?

According to our risk index, the 1.2 Dualjet and 1.2 VVT carries less risk than the M43 1.6, 1.8 and 1.9: 23/100 (low risk) versus 42/100 (moderate risk). The M43 1.6, 1.8 and 1.9 has 1 documented serious fault, the main one being «Failure of the plastic parts in the cooling system»; the 1.2 Dualjet and 1.2 VVT has no documented serious faults.

Risk index

M43 1.6, 1.8 and 1.9

42

Moderate risk · 1 serious fault

Risk index

1.2 Dualjet and 1.2 VVT

23

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

14 sourcesHow we work

Is the M43 1.6, 1.8 and 1.9 reliable?

The M43 (1993-2002) is an 8-valve petrol four-cylinder with a timing chain that Autohints describes as one of BMW’s most durable engines of the nineties. The faults the sources cite are with ancillaries: plastic cooling parts, oil leaks from the gaskets, rough idle, ignition and, in some versions, the DISA valve.[1][2][3]

See the 5 of the M43 1.6, 1.8 and 1.9 faults

Is the 1.2 Dualjet and 1.2 VVT reliable?

The Suzuki 1.2 VVT and 1.2 Dualjet (K12B/K12C/K12M) is a naturally aspirated petrol engine with a timing chain and indirect injection, fitted since 2008 to the Splash, Swift, Ignis and Baleno, with an SHVS mild-hybrid variant since 2016. It is reliable: there is no serious documented fault with the engine block itself; the main points are a clutch that wears out sooner than expected on some cars and two SHVS recalls that have already been resolved.[4][5][6][7][8]

See the 5 of the 1.2 Dualjet and 1.2 VVT faults

Side-by-side comparison

Comparison of M43 1.6, 1.8 and 1.9 and 1.2 Dualjet and 1.2 VVT
M43 1.6, 1.8 and 1.91.2 Dualjet and 1.2 VVT
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingChainChain
Power102–118 hp82–92 hp
Production1993–2002[2][9][10]since 2008[4][5]
Reliability
Risk index (what is it?)42Moderate risk23Low risk
Documented faults55
Of high or critical severity10
Worst severityHigh severityMedium severity
Main faults
  1. High severity: Failure of the plastic parts in the cooling system
  2. Medium severity: DISA intake manifold valve with play and noise
  3. Low severity: Oil leaks from gaskets (rocker cover, front cover and crankcase breather)
  1. Medium severity: Clutch: premature wear and clutch cable anchor failure
  2. Medium severity: SHVS mild-hybrid system: recalls for the starter generator belt and software
  3. Medium severity: Water pump pulley fixing (2013-2014): recall
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNone
  • 1.2 VVT 86-92 hp (K12B, one injector per cylinder, 2008-2013)[7]
  • 1.2 Dualjet non-hybrid 89-91 hp (K12B/K12C, dual injector, 2013-2020)[8][11][12]
  • 1.2 Dualjet SHVS mild hybrid 82-90 hp (K12C/K12D, since 2016)[8]
With cautionVersions to be cautious about
  • M43B16, 1.6 litre (102 hp; 1993-1999)[1][2][3]
  • M43B18, 1.8 litre (115 hp; 1993-1999)[1][13]
  • M43TUB19, 1.9 litre (105 hp; 1998-2002)[1][3][14]
  • M43TUB19, 1.9 litre (118 hp; 1998-2002)[1][3][14]
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

M43 1.6, 1.8 and 1.9

1.2 Dualjet and 1.2 VVT

See the 7 models with the 1.2 Dualjet and 1.2 VVT

Other comparisons

With the M43 1.6, 1.8 and 1.9

With the 1.2 Dualjet and 1.2 VVT

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

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

  1. BMW M43B18 1.8L 115hp inline-4 cylinder engineAutoHints · Technical documentation · consulted 2 November 2026
  2. Der BMW M43 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki.de · Other source · consulted 2 November 2026 · in German
  3. BMW M43: problemas conocidosEnginescope · Other source · consulted 2 November 2026
  4. Suzuki motor KWikipedia · Other source · consulted 27 September 2026 · in Spanish
  5. Suzuki K engineWikipedia · Other source · consulted 27 September 2026
  6. Suzuki Swift (NZ) – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  7. Suzuki Splash (2008–2014) – Bekannte Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  8. Suzuki Ignis (MF, ab 2016) – Bekannte Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  9. BMW M43Wikipedia (inglés) · Other source · consulted 2 November 2026
  10. BMW M43Wikipedia (alemán) · Other source · consulted 2 November 2026 · in German
  11. Suzuki Ignis : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  12. Suzuki Swift 2 : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  13. BMW 3 Series E36 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026
  14. 316i M43: 17 Jahre, Standhaftigkeit erhöhen (E46)BMW-Syndikat (foro) · Owners' forum · consulted 2 November 2026 · in German