Standard Ignition Neutral Safety Switch P/N:NS-140

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$128.99
MPN: NS-140
Item Package Quantity: 1
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Standard Ignition Neutral Safety Switch P/N:NS-140
Standard Ignition Neutral Safety Switch P/N:NS-140
$128.99

Get your engine cranking safely again with the Standard Ignition Neutral Safety Switch NS-140. It installs as a direct-fit replacement for the listed applications — the 1993-1997 Nissan Altima and the 1992-1996 Nissan Maxima — restoring the start-system interlock that keeps the starter from engaging while the vehicle is in gear.

  • Park/Neutral interlock: completes the starting circuit only when the transmission is in Park or Neutral, so the engine cranks in the intended shifter positions.
  • Direct-fit replacement: a straightforward swap for the worn or failed original switch on the listed vehicles.
  • Signs it may need replacing: the engine won't crank in Park or Neutral, cranking is intermittent, or the starter engages while in gear — if a faulty neutral safety switch is the cause, this replaces it.

A neutral safety switch reads the shifter position electrically and passes that signal to the starting system. Because a no-crank condition can also stem from the battery, starter, or wiring, diagnose the cause before replacing.

Interchange: S26142 · F439 · JA4310 · NS5635 · F3XY7A247A · F6XZ7A247AA · F6XZ7A247BA · SW5193 · 3191880X00 · 3191880X02 · 3191880X21. Manufacturer part number NS-140.

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

S26142, F439, JA4310, NS5635, F3XY7A247A, F6XZ7A247AA, F6XZ7A247BA, SW5193, 3191880X00, 3191880X02, 3191880X21, NS-140

Frequently Asked Questions

What does the NS-140 neutral safety switch do?

It reads the transmission's Park/Neutral position and passes that signal to the starting system, allowing the engine to crank only in Park or Neutral.

Which vehicles does this switch fit?

It's a direct-fit replacement for the 1993-1997 Nissan Altima and the 1992-1996 Nissan Maxima. Check the Buyer's Guide tab to confirm your vehicle.

What are signs this switch may need replacing?

Common signs include the engine not cranking in Park or Neutral, intermittent cranking, or the starter engaging while in gear. Diagnose the cause first.

Will replacing this switch fix a no-crank problem?

If a faulty neutral safety switch is the cause, this replaces it. A no-crank condition can also come from the battery, starter, or wiring, so confirm the cause before replacing.

What part numbers does the NS-140 interchange with?

It cross-references S26142, F439, JA4310, NS5635, F3XY7A247A, F6XZ7A247AA, F6XZ7A247BA, SW5193, 3191880X00, 3191880X02, and 3191880X21.