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Quick Reference -- Ford Part Numbers Explained

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Original Curbster

Joined: 22 Jun 2005
Age: 57
Posts: 8072
Location: TX, USA

1969 Mercury Cougar XR7

PostPosted: Wed Nov 30, 2016 9:53 am    Post subject:  Quick Reference -- Ford Part Numbers Explained Reply with quote

Part Numbers Explained
(from the 1969 Ford Master Parts Catalog)

Ford part numbers look confusing, but they actually are very informative. They are also misunderstood.Lets learn what they are trying to tell you.

The prefix

The first character is the decade: C='60s, D='70s, etc.

The second the year of that decade.

The third is the (and this is important) platform which "paid" for the design of the part.
* This DOES NOT mean that the part only goes on those vehicles of that particular carline. Nay, most engine and chassis parts cross many different carlines. Also be very aware that it doesn't even guarantee that that part goes on any vehicle in that carline -- an example is Boss 429 parts. They carry a C9AE prefix, meaning 1969 Galaxie. But we all know that there were no Boss '9 Galaxies. The full size vehicle line platform paid for NASCAR engine development.
Here are the platform codes pertinent to this parts catalog:

A – Galaxie
D – Falcon (60-69), Maverick (70-72)
F – Outside USA and Trans Am Racing
G – Comet/Montego
J – Industrial/Marine
M – Mercury
O – Fairlane/Torino
P – Autolite/Motorcraft (Aftermarket)
R – Rotunda (aftermarket)
S – Thunderbird
T – Truck
V – Lincoln
W – Cougar
Z – Mustang

The fourth character is the area of the vehicle where the part resides.
Examples are B=body, E=engine, P=auto trans; Interesting here is X=Muscle Parts (factory "hot rod" parts) usually not installed on vehicles from the factory but an "over-the-counter" add-on -- the exception here being Boss 351 unique parts. Y & Z are Lincoln-Mercury and Ford Service Parts respectively. The basic part number

The next section of numbers are the basic part number.
That is, all distributors will be 12127, regardless of the prefix or suffix, which ID the year, revision level & application. It MAY also ID the RH or LH application -- if the last digit is odd, LH if even, RH.

The suffix This indicates a revision level, where A=1st and M=13th,etc.
It CAN also indicate RH or LH, with "odd" letters (A, C, E, etc.) being LH and "even" (B, D, F, etc.) being RH.

So, we find a C9WB-16C664-C hoodscoop at a swap meet. Will it fit our 69 Cougar?

9 = 9th year
W = Cougar
B = Body part

Yes! - it fits a 69 Cougar! You will need a copy of the MPC to figure out exactly what the less obvious parts are.

“Engineering” numbers versus part numbers
These numbers are service part numbers, identified by the X, Y or Z found as the fourth digit. The number stamped or cast into the part would be the “engineering” number. A service part is a part deemed by Ford to function as well or better that the production piece it replaces. Service parts may not look anything at all like the production part. The only guarantee is that it will function. Keep this in mind when buying NOS parts!

There are many charts in the MPC that will cross reference engineering numbers to service parts numbers, I strongly recommend you purchase an MPC on CD as well as a Shop Manual (also available on CD).
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