BMW TPS Sensor Adapter for Mazda Miata NA6 NB2 (2001-2005) Intake Manifold
Step 1: Throttle Body Prep
Remove the old sensor. At this point, you may want to take precaution so that you don't get dirt or metal shavings in the throttle body.
Measure out 10mm to remove from the shaft. Mark it with a paint pen, marker, or tape. Cut it off with a cutting wheel and use a file to remove any sharp edges.


Step 2: Post Processing - Sensor mounting threads
I've kept the holes somewhat small for the sensor mount. Those are the two small hole at 25 degrees off-axis from the centerline of the adapter.
You should either print threads inside those holes or uses threaded inserts. I used M4 inserts. I had to drill out the holes a little to fit the inserts and used some epoxy (PC-7) to keep them in. If you are using inserts, make sure they are 4mm or less in height so that they fit flush inside.

Step 3: Test fit
Before screwing everything together, make sure that the sensor fits flush with the adapter and that you took enough of the shaft off.

