I designed this board for the 90-97 MX5, to be used with the DIY Autotune MS3 Pro module. Usage is very simple, get the MS3 Pro Module, get this PCB and bolt the module to it. Install inside the oem case, ultimately ending up with a “MSPNP-PRO”.

You just plug in the MS3 Pro module and install the board inside the stock ecu case. For clarity, the pcb is made for a standard MS3 Pro module, thus no modifications are necessary to the MS3 Pro or its firmware.

You are buying the bare (white) pcb only. The components are not included. The MS3 Pro module is not included.

You will be getting the latest NA version. See my other auctions for the NB version. Some pictures above show the NB version, but you will be getting the NA version

Full instructions included

Assembly instructions

Interactive BOM

Functions:

• usb connector
• pullup resistors for all in- and outputs
• proto area with gnd, 5V and 12V
• RS232 to TTL (for internal bluetooth module)
• CAN port
• map sensor MPX-4250AP
• 2nd map sensor for baro correction (MPX-4250AP or the MPXH6400A equivalent in SMD footprint)
• All unused in- and outputs can be brought out to the mazda connector in case you have extra functions.
• All information is on the front and back silk to make it easier to do modifications. It’s just a matter of adding a resistor or a jumper.
• TinyIOx ready