By Anthony El Harif JMA National Sales Manager JMA is a worldwide key blank, key machine and cloning equipment manufacturer with production facilities throughout Europe, North and South America. JMA manufactures more than 30,000 different cylindrical and automotive key blanks for the world market. To be able to sell these key blanks, each has to have some type of an identifiable part number that is part of an overall key blank numbering system.
Key blank numbering systems have historically been a complicated situation for key blank manufacturers and locksmiths all over the world. Most key blank manufacturer catalogs include cross-reference charts from other manufacturers’ part numbers to their part numbers in an attempt to reduce confusion over key blank numbering systems and their application.
In this article, we explain JMA’s transponder key blank numbering system and the logic behind it. In addition, we will cite examples of key blank numbers using different manufacturer’s numbering systems.
Transponder-equipped automotive key blanks have two components: The actual mechanical key blank and the transponder that contains the electronic code required to start the engine. JMA’s part numbers include information that identifies the key blank including the blade and the head shape, and the transponder when equipped.
JMA’s automotive part numbering system is divided into two portions. The first portion of the part number used to indicate the transponder.
Transponder manufacturers include Texas Instruments®, Megamos, Philips®, Temic, etc. In addition, transponder manufacturers may offer different transponder configurations, some of which can include fixed value transponders, encrypted transponders and clonable transponders.
The transponder can be removed from JMA automotive transponder-equipped key blanks and JMA automotive key blanks can be ordered with or without a transponder.
The second portion is the key blank part number. To simplify our numbering system, the JMA automotive key blank numbering system will always begin with two, three or four letters of the automobile manufacturer’s name. They include:
- “CHR” for Chrysler, Dodge and Jeep
- “FO” for Ford, Lincoln and Mercury
- “GM” for Buick, Cadillac, Chevrolet, GMC, Hummer, Oldsmobile and Pontiac
- “HAA” for Audi and Volkswagen
- “HOND” for Honda and Acura
- “MAZ” for Mazda
- “DAT” for Nissan and Infiniti
- “MIT” for Mitsubishi
- “TOYO” for Toyota and Lexus
The only variations are for vehicles that have “nameplate” changes. Three examples are:
- Mazda Tribute, which uses a Ford “FO” key blank
- Chrysler Sebring two-door, which uses a Mitsubishi “MIT” key blank
- Dodge Sprinter, which uses a Mercedes Benz “ME” key blank.
The numbers that follow the manufacturer’s shortened name are in sequential order. For example, the number 15 following the FO- in the Ford 8-cut transponder equipped key using the fixed value transponder chip (H72PT), meaning this key blank is the 15th Ford key blank JMA has manufactured. The JMA Ford ten cut transponder equipped key blank is number 16. The sequential number changes if the head and the transponder change even if the blade remains the same. For example, the Ford 8-cut oval key blank (599114) has the sequential number of 30 because of the change of the head shape and the transponder.
Additional letter(s) may follow the sequential number. Continuing with the example of the Ford H72PT key blank number, the JMA key blank number has the letters “D.P” following the sequential number. “D” indicates a reversed keyway and “P” indicates plastic head.
The JMA version of the H72PT Ford key blank has the number “FO-15.P.D” coined onto one side of the plastic head. The other side of the plastic head has “JMA” coined. The key blanks themselves have only the head and blade reference; they do not have the transponder part number. This is because the transponder can be removed and a different transponder installed.
Several more key blank examples can be the General Motors (B111PT) key blank has the GM-37.P coined onto one side of the plastic head. The Honda (HD106PT) key blank has the HOND-21.P coined onto one side of the plastic head. Transponder information is on the packaging.
The first portion of the JMA key blank part number is the transponder used to operate the vehicle. Transponders can be divided into two main groups programmable and clonable. The H72PT key used in the example above uses a Texas Instruments Fixed Code programmable transponder. JMA’s version of Texas Instrument’s fixed code transponder is a TP02 transponder.
JMA’s part number for the popular Ford H72PT key blank is TP02FO-15D.P. The first portion of the part number is the Texas Instruments fixed value transponder, the TP02 that is embedded in this key blank. The second portion is the key blank part number FO-15D.P. The key blank number will always begin with the automobile manufacturer. For this key blank, “FO” indicates Ford. The “15” is the sequential number and the “D.P” indicates a reversed keyway and plastic head.
In addition to the fixed value programmable transponder, the FO-15D.P key blank is available with a clonable transponder or no transponder. JMA’s clonable version of Texas Instrument’s fixed code transponder is a TPX1FO-15P.D, with “TPX1” indicating the fixed value clonable transponder. The JMA Ford key blank without transponder would be the TP00FO-15P.D, with “TP00” indicating no transponder.
Ford, Lincoln, Mercury
All Ford, Lincoln and Mercury vehicles sold in North America can be operated with transponder-equipped keys having five different transponders. They are:
Programmable Ford Transponders
“TP02” fixed value Texas Instruments transponder similar to H72PT
“TP06” encrypted Texas Instruments transponder similar to H74PT/H86PT
“TP20” encrypted Texas Instruments transponder similar to 599114
Clonable Ford Transponders
“TPX1” fixed value clonable transponder for TI
“TPX2” encrypted clonable transponder for TI
The JMA Ford 8-cut transponder key blanks cross-reference is:
Programmable transponder Clonable Transponder
H72PT TP02FO-15D.P TPX1FO-15D.P
H74PT TP06FO-15D.P TPX2FO-15D.P
H86PT TP06FO-15D.P TPX2FO-15D.P
599114 TP20FO-30D.P TPX2FO-30D.P
General Motors
For General Motor’s vehicles, there are more than five different transponders. They are:
Programmable GM Transponders
“TP05” fixed value Megamos transponder similar to B97PT (PK3)
“TP08” encrypted Megamos transponder similar to B112PT (PK3+)
“TP12” encrypted Philips transponder similar to B111PT (C+)
Clonable GM Transponders
“TP05” fixed value Megamos transponder similar to B98PT5
“TPX3” Philips Second Generation Crypto transponder
The JMA General Motors 10-cut transponder key blanks cross-reference is:
Programmable transponder Clonable Transponder
B97PT TP05GM-27V.P TP05GM-27.P
B112PT TP08GM-28.P N.A.
B111PT TP12GM-37.P TPX3GM-37.P
Note: The GM TP05 chip can be used for both cloning and programming.
Chrysler, Dodge, Jeep
For the Chrysler family of vehicles including Dodge and Jeep vehicles, there are four different transponders. They are:
Programmable Chrysler Transponders
“TP21” encrypted Texas Instruments transponder similar to Y160PT
“TP12” encrypted Philips transponder similar to Y164PT
Clonable Chrysler Transponders
“TPX2” Texas Crypto transponder
“TPX3” Philips Second Generation Crypto transponder
The JMA Chrysler 8-cut transponder key blanks cross-reference is:
Programmable transponder Clonable Transponder
Y160PT TP21CHR-15.PG TPX2CHR-15.PG
Y164PT TP12CHR-15.PC TPX3CHR-15.PC
Note: The letter following the “P” indicates color for Chrysler key blank head. The “G” indicates gray head color and the “C” indicates tan head color.
Blanks Plus Or Minus Transponders
JMA is the only known key blank manufacturer that makes its transponder-based automotive key blanks available with or without the transponder in shells so a transponder can be removed and installed. This provides the capability of removing the transponder chip from a worn or broken key and installing it into a new shell. No programming or cloning required and the cuts can either be originated or duplicated.
Using JMA key blanks helps to limit the number of key blanks that must be stocked to satisfy your customer’s requirements. For some vehicles, there are three transponder options for a specific keyway. This could include a fixed value transponder, an encrypted transponder and a clonable transponder. Depending upon the customer’s need, the one shell can accommodate any of the three transponders. This eliminates the need to stock three different transponder-equipped key blank numbers as the transponders chips and the key blanks can be purchased separately.
All of JMA’s transponder key blanks are designed with a removable chip insert, which allows easy removal of the transponder in the event the key blank is miscut. Chips can be reused by inserting them into a “chipless” version of the key. The “chipless” part number for the Ford H72PT, is the TP00FO-15D.P, with TP00 indicating there is no transponder in the key blank.
JMA’s clonable transponder equipped key blanks can be cloned using the JMA TRS5000 Cloning Device for the JMA TPX1, TPX2 and TPX3 equipped key blanks. The TRS5000 Cloning Device can clone all “T5” transponder equipped key blanks from other key blank manufacturers. You can use TP05 transponder (T5 KEYS) with JMA shells in other manufacturer’s cloning machines.
Advanced Diagnostic’s AD900 and Istanbul Anhatar’s Zed Bull can clone the TPX1 stand alone, TPX2 with Internet (or stand alone using a board) No TPX3 yet.
For more information, email JMA at [email protected] or visit the web site
