Keep your engine cranking only when the transmission is safely in Park or Neutral with the Standard Ignition Neutral Safety Switch NS-493. This direct-fit replacement is a plug-in switch for the listed applications, including the 2000-2006 Nissan Sentra, 2001-2003 Nissan Maxima, 2002-2005 and 2007-2010 Nissan Altima, 2004 Infiniti G35, 2009 Nissan 350Z, 2009-2014 Nissan 370Z, 2009-2020 Nissan GT-R, and 2010 Infiniti G37.
- Start-safety function: Signals the starting circuit so the engine cranks only when the transmission is in Park or Neutral.
- Direct-fit replacement: Installs in place of the original switch on the listed applications.
- Restores switch operation: Replaces a worn or failed original neutral safety switch to return proper switch signaling.
Signs the original switch may need replacing include no-crank in Park while the engine cranks in Neutral (or vice-versa), or intermittent starting. If a failed neutral safety switch is the cause, this replaces it — diagnose the no-start condition first, since other components can produce similar symptoms.
Interchange: S41258 · JA4464 · NS6711 · 320066J000 · 320066J00A · Manufacturer part number NS-493
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the Neutral Safety Switch NS-493 do?
It signals the starting circuit so the engine cranks only when the transmission is in Park or Neutral, helping prevent a start in gear.
Which vehicles does the NS-493 fit?
It's a direct-fit replacement for the listed applications, including the 2000-2006 Nissan Sentra, 2002-2005 and 2007-2010 Nissan Altima, and 2009-2020 Nissan GT-R. See the Buyer's Guide tab for the full list.
What numbers does this switch interchange with?
It replaces S41258, JA4464, NS6711, 320066J000, and 320066J00A. The manufacturer part number is NS-493.
What are signs my neutral safety switch may be failing?
A no-crank in Park while it cranks in Neutral (or vice-versa), or intermittent starting. Diagnose the no-start first, since other parts can cause similar symptoms.
Is this a direct-fit replacement?
Yes. It installs in place of the original neutral safety switch on the listed applications to restore proper switch operation.
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