M43 1.6, 1.8 and 1.9 vs 1.5 K15B (Jimny): which engine is more reliable?

According to our risk index, the 1.5 K15B (Jimny) carries less risk than the M43 1.6, 1.8 and 1.9: 14/100 (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 1.5 K15B (Jimny) has no documented serious faults.

Risk index

M43 1.6, 1.8 and 1.9

Moderate risk · 1 serious fault

Risk index

1.5 K15B (Jimny)

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

Reviewed on 2 November 202613 sources How 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 1.5 K15B (Jimny) reliable?

The 1.5 K15B in the Suzuki Jimny is a 102 hp naturally aspirated four-cylinder with a timing chain, simple and with no documented faults of its own. The only thing recorded in Europe is a 2018-2020 recall for the fuel pump, precautionary and with a definitive remedy.^[4][5][6]

See the of the 1.5 K15B (Jimny) fault

Side-by-side comparison

Comparison of M43 1.6, 1.8 and 1.9 and 1.5 K15B (Jimny)
Item	M43 1.6, 1.8 and 1.9	1.5 K15B (Jimny)
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,462 cm³
Timing	Chain	Chain
Power	102–118 hp	102 hp
Production	1993–2002^[2][7][8]	since 2018^[9][10][11]
Reliability
Risk index (what is it?)	42Moderate risk	14Low risk
Documented faults	5	1
Of high or critical severity	1	0
Worst severity	High severity	Medium severity
Main faults	High severity: Failure of the plastic parts in the cooling system Medium severity: DISA intake manifold valve with play and noise Low severity: Oil leaks from gaskets (rocker cover, front cover and crankcase breather)	Medium severity: Fuel pump with resin impeller that swells (recall)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	1.5 K15B 102 hp (Jimny IV, 2018-present)^[4][5][6]
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][12] M43TUB19, 1.9 litre (105 hp; 1998-2002)^[1][3][13] M43TUB19, 1.9 litre (118 hp; 1998-2002)^[1][3][13]	None
AvoidVersions to avoid	None	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

M43 1.6, 1.8 and 1.9

1.5 K15B (Jimny)

Suzuki Jimny IV

Other comparisons

With the M43 1.6, 1.8 and 1.9

With the 1.5 K15B (Jimny)

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.

BMW M43B18 1.8L 115hp inline-4 cylinder engineAutoHints · Technical documentation · consulted 2 November 2026
Der BMW M43 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki.de · Other source · consulted 2 November 2026 · in German
BMW M43: problemas conocidosEnginescope · Other source · consulted 2 November 2026
Problemas Suzuki JimnyTotalrenting · General press · consulted 30 October 2026 · in Spanish
Suzuki Jimny: problemas comunes y llamadas a revisióncar-recalls.eu · Other source · consulted 30 October 2026 · in Spanish
Suzuki Jimny Problemecarwiki.de · General press · consulted 30 October 2026 · in German
BMW M43Wikipedia (inglés) · Other source · consulted 2 November 2026
BMW M43Wikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Suzuki K engineWikipedia · Other source · consulted 30 October 2026
Suzuki motor KWikipedia · Other source · consulted 30 October 2026 · in Spanish
Suzuki JimnyWikipedia · Other source · consulted 30 October 2026 · in Spanish
BMW 3 Series E36 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026
316i M43: 17 Jahre, Standhaftigkeit erhöhen (E46)BMW-Syndikat (foro) · Owners' forum · consulted 2 November 2026 · in German