Keep spark and fuel injection timed to the crankshaft with the Delphi Engine Crankshaft Position Sensor SS12019. It's a direct-fit replacement for the 1999-2005 Mazda Miata, restoring the position signal the engine control module relies on to time ignition and fuel delivery.
- Core job: reads the rotational position and speed of the crankshaft and sends that signal to the ECM.
- Why it matters: the ECM uses this input to schedule ignition timing and fuel injection events.
- Signs it may need replacing: hard starting, a no-start, stalling, intermittent cutout, or a stored crank-sensor trouble code — diagnose the cause before replacing, since these symptoms can have other sources.
- Direct fit: replaces the original sensor on the listed application.
If a failed crankshaft position sensor is the cause of your no-start or stall, this Delphi unit replaces it.
Interchange: CSS835 · CSS9037 · BP4W-18-221A · BP4W18221A · BP4W-18-221B · BP4W18221B · PC390 · 235-1032 · 2351032 · 5S1825 · SU4350
Manufacturer part number SS12019.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this crankshaft position sensor do?
It reads the crankshaft's rotational position and speed and sends that signal to the engine control module, which uses it to time ignition and fuel injection.
What vehicle does the Delphi SS12019 fit?
It is a direct-fit replacement for the 1999-2005 Mazda Miata. Confirm fitment for your specific vehicle before ordering.
What are the signs this sensor may need replacing?
Hard starting, a no-start, stalling, intermittent engine cutout, or a stored crank-sensor code may be signs. Diagnose the cause first, as these can have other sources.
Which part numbers does this sensor interchange with?
It interchanges with CSS835, CSS9037, BP4W-18-221A, BP4W-18-221B, PC390, 235-1032, 5S1825, and SU4350.
Will replacing this sensor fix my no-start?
If a failed crankshaft position sensor is the cause, this replaces it. A no-start can have other causes, so confirm the sensor is at fault before replacing.
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