Both versions have the same casting, late has no finished machining at time of production.
Found on the earliest production M20b25 325i/iS cars, primarily in ECE version vehicles though early production US 1987 models can have the version without the adjustment screw.
Throttle Position Sensor -NOT INCLUDED- but will be cleaned and adjusted if sent in with customers core.
Completely disassembling and ultrasonically cleaned.
Strip existing oxidized plating off steel components, polish and replate in fresh zinc yellow chromate where appropriate and original.
All aluminum, brass components are vapor honed inside and out.
Throttle shaft, plates and pivot arm vapor honed, polished or brushed.
New double sealed INA or SKF throttle shaft bearings pressed into the housing
Fully reassembled with new throttle plate screws and O-rings.
Throttle position sensor tip in point set and locked down.
