Chrysler Part Number system

Greg Housto

Chrysler Part Number system

by Greg Housto » Sun, 14 Mar 2004 10:35:25

Is there any method to the madness of Chrysler part
numbers?  For example if a part number is 1234567, does part
number 1234567AA indicate that an improvement was made to
the original part number, and 1234567AB is a newer
improvement still?

I am wondering if the AA or AB suffixes make earlier part
number obsolete, or if there is no definite correlation.

For example, the 1998 LH cooling bottle is 4758269.
The 1999 LH cooling bottle is listed as 4758269AB.

Chrysler is now selling cooling bottle 4758269AC, which
apparently replaces 4758269AB.  Does it replace 4758269 too?
If 4758269AB is ordered from Mother Mopar, would they
substitute 4758269AC?

Just curious :)

Joh

Chrysler Part Number system

by Joh » Sun, 14 Mar 2004 12:27:03

Chrysler treats the last two letters of the part number as a drawing
revision field.   Each time the part or the drawing of the part  is
changed the last two letters are bumped up one digit.   Generally as
long as the main number does not change it is still form, fit and
functionally the same BUT it does not have to be.
Generally the higher lettered parts are better since the modification
fixed some problem but they don't have to be.  They only have to be
slightly different.
John



Daniel J. Ster

Chrysler Part Number system

by Daniel J. Ster » Sun, 14 Mar 2004 12:17:07


> Is there any method to the madness of Chrysler part numbers?

Yes. Has been for years. The letter suffixes and 8-digit part numbers are
rather new. From the 1950s through the late 1990s, part numbers were 7
digits. While there was no formal numerical nomenclature, it was possible
to discern from the part number its approximate year of first usage and
its probable general type (fuel, electrical, air conditioning, body trim,
etc.) The one weakness with this system is that many times, an
functionally identical part was given a new number because of a
vanishingly minor design or material change or a change of supplier.
Four*** different part numbers for wholly-interchangeable distributor
caps, that sort of thing.

Improvement? No. It means a change, of ANY kind. The most frequent kind of
change is a change in supplier. Other kinds can be material changes, minor
design changes, etc.

No definite correlation.

This reflects the introduction of the letter suffixes.

Almost certainly.

DS

Greg Housto

Chrysler Part Number system

by Greg Housto » Sun, 14 Mar 2004 12:36:35


> Chrysler treats the last two letters of the part number as a drawing
> revision field.   Each time the part or the drawing of the part  is
> changed the last two letters are bumped up one digit.   Generally as
> long as the main number does not change it is still form, fit and
> functionally the same BUT it does not have to be.
> Generally the higher lettered parts are better since the modification
> fixed some problem but they don't have to be.  They only have to be
> slightly different.
> John

Thanks!  This is pretty much what I was suspecting, but wasn't sure.
Does the first part number for a part (i.e. before any revisions) have no
suffix, so that -AA represents the first revision to a number?
SamMa

Chrysler Part Number system

by SamMa » Mon, 15 Mar 2004 04:36:23

The last two letters are NOT the change level!  There is a separate change
level for all parts.  The two letters are called a nic.  It is used to
specify a newer version of a relased part.  Each part can then have several
"engineering" change levels "A", "B", "C", etc....


> Chrysler treats the last two letters of the part number as a drawing
> revision field.   Each time the part or the drawing of the part  is
> changed the last two letters are bumped up one digit.   Generally as
> long as the main number does not change it is still form, fit and
> functionally the same BUT it does not have to be.
> Generally the higher lettered parts are better since the modification
> fixed some problem but they don't have to be.  They only have to be
> slightly different.
> John



> >Is there any method to the madness of Chrysler part
> >numbers?  For example if a part number is 1234567, does part
> >number 1234567AA indicate that an improvement was made to
> >the original part number, and 1234567AB is a newer
> >improvement still?

> >I am wondering if the AA or AB suffixes make earlier part
> >number obsolete, or if there is no definite correlation.

> >For example, the 1998 LH cooling bottle is 4758269.
> >The 1999 LH cooling bottle is listed as 4758269AB.

> >Chrysler is now selling cooling bottle 4758269AC, which
> >apparently replaces 4758269AB.  Does it replace 4758269 too?
> >If 4758269AB is ordered from Mother Mopar, would they
> >substitute 4758269AC?
> Generally YES

> >Just curious :)

Jason

Chrysler Part Number system

by Jason » Mon, 15 Mar 2004 15:00:18



Ahem, that was excellent discussions, I'm also curious about my parts:

Also is there info on older mopar computer modules (SCC or ESA) for
caravan's 2.2L carb era (1984 thru 1987)?

Especially wanted to know what these two computers I have setup for
which carb (non-feedback or feedback types), which emissions systems:
Canadian, federal or calif?

5227379 3106

5227382 0976

Reason: owner did strange things to my 'van I bought while back, need
to know these info so I can straighten the mess out, second computer
was lying in the 'van under the seat. :-)

Thanks,

Wizard

deadbea

Chrysler Part Number system

by deadbea » Tue, 16 Mar 2004 04:25:11

The part number sequences are arranged to identify a) an improvement to part
(ie) different materials used. b) if there is a change in vendor (ie) if it
switches from Federal-Mogul to Magna corporation. Very rarely will it be an
improvement to the actual efficiency or operating improvement to the part.
Usually the part number would be changed entirely and renumber again due to
minor changes. The part number system was changed from straight numeric to
numeric/alpha, to follow up on part failures to charge back the manufacturer
of the parts to recoup warranty costs.



> >Is there any method to the madness of Chrysler part
> >numbers?  For example if a part number is 1234567, does part
> >number 1234567AA indicate that an improvement was made to
> >the original part number, and 1234567AB is a newer
> >improvement still?

> >I am wondering if the AA or AB suffixes make earlier part
> >number obsolete, or if there is no definite correlation.

> >For example, the 1998 LH cooling bottle is 4758269.
> >The 1999 LH cooling bottle is listed as 4758269AB.

> >Chrysler is now selling cooling bottle 4758269AC, which
> >apparently replaces 4758269AB.  Does it replace 4758269 too?
> >If 4758269AB is ordered from Mother Mopar, would they
> >substitute 4758269AC?

> >Just curious :)

> Ahem, that was excellent discussions, I'm also curious about my parts:

> Also is there info on older mopar computer modules (SCC or ESA) for
> caravan's 2.2L carb era (1984 thru 1987)?

> Especially wanted to know what these two computers I have setup for
> which carb (non-feedback or feedback types), which emissions systems:
> Canadian, federal or calif?

> 5227379 3106

> 5227382 0976

> Reason: owner did strange things to my 'van I bought while back, need
> to know these info so I can straighten the mess out, second computer
> was lying in the 'van under the seat. :-)

> Thanks,

> Wizard