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M43 1.6, 1.8 and 1.9 vs BMW N13: which engine is more reliable?

According to our risk index, the M43 1.6, 1.8 and 1.9 carries less risk than the BMW N13: 42/100 (moderate risk) versus 57/100 (high 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 BMW N13 has 1 documented serious fault, the main one being «Timing chain and tensioner wear».

Risk index

M43 1.6, 1.8 and 1.9

42

Moderate risk · 1 serious fault

Lower risk

Risk index

BMW N13

57

High risk · 1 serious fault

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

10 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 BMW N13 reliable?

The BMW N13 (2011-2016), BMW's first turbocharged four-cylinder in three decades, powered the 114i, 116i, 118i and 120i (F20/F21) and the 316i (F30). It derives from the Prince engine developed with PSA, the same origin as the 1.6 THP. In 2013 BMW issued a technical service bulletin over timing chain and tensioner wear; oil consumption and carbon build-up on the injectors are other weak points shared with that family.[4][5][6]

See the 4 of the BMW N13 faults

Side-by-side comparison

Comparison of M43 1.6, 1.8 and 1.9 and BMW N13
M43 1.6, 1.8 and 1.9BMW N13
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement—1,598 cm³
TimingChainChain
Power102–118 hp102–177 hp
Production1993–2002[2][7][8]2011–2016[4][5]
Reliability
Risk index (what is it?)42Moderate risk57High risk
Documented faults54
Of high or critical severity11
Worst severityHigh severityCritical 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. Critical severity: Timing chain and tensioner wear
  2. Medium severity: High oil consumption
  3. Medium severity: High-pressure fuel pump (HPFP) failure
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
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][9]
  • M43TUB19, 1.9 litre (105 hp; 1998-2002)[1][3][10]
  • M43TUB19, 1.9 litre (118 hp; 1998-2002)[1][3][10]
  • 114i 102 hp (75 kW, 2012-2015)[5][6]
  • 116i / 316i 136 hp (100 kW, 2011-2015)[5][6]
  • 118i 170 hp (125 kW, 2011-2016)[5][6]
  • 120i 177 hp (130 kW, 2015-2016)[5][6]
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

BMW N13

Other comparisons

With the M43 1.6, 1.8 and 1.9

With the BMW N13

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 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. BMW N13Wikipedia (inglés) · Other source · consulted 27 September 2026
  5. BMW N13Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  6. Tickende Zeitbombe: So zuverlässig ist der Prince-Motor von PSA und BMWGebrauchtwagenberater.de · Motoring press · published 13 March 2026 · consulted 27 September 2026 · in German
  7. BMW M43Wikipedia (inglés) · Other source · consulted 2 November 2026
  8. BMW M43Wikipedia (alemán) · Other source · consulted 2 November 2026 · in German
  9. BMW 3 Series E36 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026
  10. 316i M43: 17 Jahre, Standhaftigkeit erhöhen (E46)BMW-Syndikat (foro) · Owners' forum · consulted 2 November 2026 · in German