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THE
BMW DIAGNOSTIC CONNECTORS
THERE
ARE ONLY TWO STYLES: BMW
first installed the service lights in 1982. At that time the BMW
diagnostic connector had only 15 pins. In 1987, to add new
options they switched to a 20 pin connector. Unfortunately it
was not a clean break from the old style. Many 87 and 88's have
the 15 pin "old" style connector, as they did not
completely phase out the 15 pin connector until late 1988.
Check the
following chart to determine whether you have the "A"
style (15 pin) connector or the "B"style (20 pin)
connector. If your BMW is an 87 or an 88 and it does not appear
on this chart you will need to check your car to determine which
one you have. (Examples: a 1988 535i has
the "A" style plug: A 1987 325ic has the "B"
plug)
P
|

"A"
15
pin socket |

"B"
20
pin socket
|
|
1982
to
1986
|
1987 |
1988
|
1987 |
1988
|
1989
to
2000
|
|
All
models
|
316
320i 325
325e
325es
528e
535i,
is
635csi
L6
L7
735
735i
|
528
535
M5
535i,
is
|
325i,
is, ic
525i,
is
|
M3
325i,
is, IC
520
525i,
is
528e
625csi
M6
735
(all)
750i,
il
|
All
models
(All
models that have the B style plug) |
|