Standard Ignition Neutral Safety Switch NS-646
Standard Ignition Neutral Safety Switch NS-646 - view 2
Standard Ignition Neutral Safety Switch NS-646 - view 3
Standard Ignition Neutral Safety Switch NS-646
Standard Ignition Neutral Safety Switch NS-646 - view 2
Standard Ignition Neutral Safety Switch NS-646 - view 3

Standard Ignition Neutral Safety Switch P/N:NS-646

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$242.99
MPN: NS-646
UPC: 727943480811
Item Package Quantity: 1
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Standard Ignition Neutral Safety Switch P/N:NS-646
Standard Ignition Neutral Safety Switch P/N:NS-646
$242.99

Help keep the engine from cranking unless the shifter is in Park or Neutral with the Standard Ignition Neutral Safety Switch NS-646, a direct-fit replacement for the 2013 Honda Fit and the 2009-2014 Acura TSX. This electrically operated switch replaces a damaged original unit and is designed to restore the vehicle's neutral safety function.

  • Built to OE spec: Standard Ignition makes its switches to OE spec for proper fit, form and function.
  • Copper alloy conductors: Provide strong electrical conductivity with low resistive losses.
  • Direct-fit replacement: An electrically operated switch intended to replace a damaged OE unit and return neutral safety function to the starting circuit.
  • Robust design: High-grade materials are chosen to handle the demands of today's service professional.

Signs this part may need replacing: the engine will not crank in Park, starts only in Neutral, or cranks only after the shifter is moved or jiggled. Other starting-circuit faults can cause the same symptoms, so diagnose the cause before replacing the switch.

See the Buyer's Guide tab for engine details.

Interchange: 28900RCT014 · 28900RCT024 · CWS543 · SW8738 · NS7048

This part cross-references / interchanges with the following part numbers:

28900RCT014, 28900RCT024, CWS543, SW8738, NS7048, NS-646

Frequently Asked Questions

Will this Fit switch work on my 2013 Honda Fit?

Yes. Standard Ignition NS-646 is listed for the 2013 Honda Fit and the 2009-2014 Acura TSX. See the Buyer's Guide tab for engine details.

What does a neutral safety switch do?

It is an electrically operated switch that lets the starting circuit work only when the shifter is in Park or Neutral. This helps keep the engine from cranking while the vehicle is in gear.

What are signs this TSX switch may need replacing?

Signs include no crank in Park, starting only in Neutral, or cranking only after the shifter is moved. Other faults can cause these symptoms, so diagnose the cause first.

Which part numbers does NS-646 interchange with?

It cross-references 28900RCT014, 28900RCT024, CWS543, SW8738 and NS7048.

How is this Standard Ignition switch built?

It is made to OE spec for proper fit, form and function. It uses copper alloy conductors for electrical conductivity with low resistive losses.

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