JM4 Factory-verified

Saturn · Regular Production Option

Brake system, power, front disc, rear drum, cast iron, antilock, front and rear wheel

Years 1998–07 Models 6 Factory citations 12

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Also described as Brake system, power, front disc, rear drum, cast iron, antilock

Also documented for Buick Chevrolet GMC Oldsmobile Pontiac

Documented applications

Ion (2003–2007)

2003–2007 Factory-verified

GM factory document — 2003 saturn ion rpo code list, p.1.
GM factory document — 2007 saturn ion rpo code list, p.1.

L-Series (2000–2005)

2003–2004 Factory-verified

GM factory document — 2003 saturn l200 lw200 rpo code list, p.1.
GM factory document — 2004 saturn l300 lw300 rpo code list, p.1.

Saturn SC — second generation (1997–2002)

1998–2002 Factory-verified

GM factory document — 1998 saturn sl1 sc1 sw1 rpo code list, p.1.
GM factory document — 2002 saturn sl1 sc1 rpo code list, p.1.

SL — Second generation (1996–2002)

1998–2002 Factory-verified

GM factory document — 1998 saturn sl rpo code list, p.1.
GM factory document — 2002 saturn sl rpo code list, p.1.

SW — S-Series second generation wagon (1996–2001)

1998–2001 Factory-verified

GM factory document — 1998 saturn sl1 sc1 sw1 rpo code list, p.1.
GM factory document — 2001 saturn sl1 sc1 sw1 rpo code list, p.1.

Vue — First generation (2002–2007)

2002–2007 Factory-verified

GM factory document — 2002 saturn vue awd rpo code list, p.1.
GM factory document — 2007 saturn vue awd rpo code list, p.1.

This page aggregates every documented appearance of JM4 in the Saturn reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.