this is used on 2004 and 2005 FWD cars

It uses two Infineon Technologies Processors # SAK-C167CS-LM

"Highly Integrated Highest Performance Microcontroller THE C167CS is a new high and derivative of the Infineon C166 Family of full features single-chip CMOS microcontrollers. The C167CS features additionally internal units like two CAN modules (V2.0B active), ADC, CAPCOM, XRAM, IRAM, PLL, Watchdog, RTC, GPT, power management control and up to 40 MHz performance. THIS MICROCONTROLLER fulfills the requirements of highly sophisticated automotive and industrial control applications. "

Software Downloads - Infineon Technologies
"Product Name C500 C800 XC800 Version Description Manual and Download FLOAD X v4.4 FLOAD is a free-of-charge software program that runs on a PC to download HEX code into Infineon XC800 microcontrollers with programmable non-volatile on-chip memory (OTP, Flash, EEPROM) or volatile memory (XRAM). It is able to program XC800 devices through different types of bootstrap loaders (BSLs), i.e. UART, CAN, and LIN, through JTAG/DAS, and through RS485 as well. FLOAD4.4.zip (958 KB) FLOAD User Manual1.0.pdf release_notev4.4.html MemTool V4 X v4.1.1 MemTool is a free of charge software designed for on-chip flash programming. MemTool V4 is supporting the XC800, XC166, XC2000 and TriCore family. MemTool release notes MemTool v4.1.1 zip download (10,5 MB) XC800 SDCC X v2.5.4 B4 R1.6 XC800 SDCC [Small Device C Compiler] is a so called open software compiler tool chain and can be used for XC800 related embedded development applications. Supported micro"

SK-167CS Starter Kit - Infineon Technologies
"MCU Derivates: SAK-C167CS-LM CPU Clock : 25 MHz On-Chip Memory : - 3 KBytes On-Chip Internal RAM (IRAM), - 8 KBytes On-Chip Extension RAM (XRAM), On-Boards Memory : 64 kByte SRAM 256 kByte FLASH Interfaces : - 2 x RS-232 - 2 x CAN Includings : - Technical Documentation: e.g. User manuals (System unit and Peripheral unit), Architecture manual (print and pdf-version) - Evaluation Versions of Development Tools: e.g. Compiler, Debugger, Operating System from Tool Partners - serial cable, - Starter Kit Manual (print and pdf-version) Order Nr. : B158-H7183-X-X-7600 Price* : 180,- EUR How to order? To order your kit, please contact your local distributor: http://www.infineon.com/distribution . * recommended retail price. Valid from 2004-Dec-01. "