Start your Mazda only when the clutch is safely down with the Standard Ignition Clutch Starter Safety Switch NS-633. It drops in as a direct-fit replacement for the listed applications: the 2007-2010, 2012-2013, and 2015 Mazda 5, the 2007-2013 Mazda 6, the 2007-2015 Mazda MX-5 Miata, and the 2009-2011 Mazda RX-8 (all engines).
This switch is the safety interlock in the starter circuit on a manual-transmission vehicle. It reads clutch-pedal position so the starter can be energized only when the pedal is fully depressed, helping prevent the engine from cranking while the car is in gear.
Signs this part may need replacing include an engine that won't crank even with the clutch fully depressed, or a starter that engages without the pedal pressed. Because those symptoms can have other causes, diagnose the circuit first; if a failed clutch starter safety switch is the cause, this replaces it.
Manufacturer part number NS-633.
What does the Clutch Starter Safety Switch NS-633 do?
It is the starter-circuit interlock on a manual-transmission car, sensing clutch-pedal position so the starter can be energized only when the pedal is fully depressed.
Which vehicles does the NS-633 fit?
The 2007-2010, 2012-2013 and 2015 Mazda 5, the 2007-2013 Mazda 6, the 2007-2015 Mazda MX-5 Miata, and the 2009-2011 Mazda RX-8 (all engines). See the Buyer's Guide tab to confirm your vehicle.
What are signs this switch may need replacing?
The engine won't crank even with the clutch fully pressed, or the starter engages without the pedal depressed. Diagnose the circuit first, as other causes are possible.
Will this let the engine start without pressing the clutch?
No. When working correctly, the switch completes the starter circuit only when the clutch pedal is fully depressed, helping prevent cranking while the car is in gear.
What is the manufacturer part number?
This is Standard Ignition manufacturer part number NS-633, a Clutch Starter Safety Switch.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
