Standard Ignition Neutral Safety Switch NS-343
Standard Ignition Neutral Safety Switch NS-343 - view 2
Standard Ignition Neutral Safety Switch NS-343 - view 3
Standard Ignition Neutral Safety Switch NS-343
Standard Ignition Neutral Safety Switch NS-343 - view 2
Standard Ignition Neutral Safety Switch NS-343 - view 3

Neutral Safety Switch for 2003 Infiniti Q45 - Standard Ignition NS-343

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$69.99
MPN: NS-343
Item Package Quantity: 1
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Standard Ignition Neutral Safety Switch P/N:NS-343
Standard Ignition Neutral Safety Switch P/N:NS-343
$69.99

Keep your starter safely locked out of gear with the Standard Ignition Neutral Safety Switch NS-343. It installs as a direct-fit replacement for the 2003 INFINITI Q45, restoring the switch that allows the engine to crank only when the transmission is in Park or Neutral.

  • Start-safety function: completes the starter circuit only in the permitted gear positions, helping prevent the engine from cranking while in a drive gear.
  • Direct-fit replacement: designed to replace the original neutral safety switch on the listed application.
  • Signals the transmission position: reads the selected gear so the vehicle's electrical system responds to Park/Neutral as intended.

A neutral safety switch that has worn or failed can produce common symptoms such as a no-crank condition in Park, cranking only when the shifter is nudged, or intermittent starting. If a faulty neutral safety switch is the cause of these signs, this unit replaces it; diagnose the starting circuit first to confirm the switch is the culprit before ordering.

Interchange: NS38055 · SW7478 · NS6837 · 34980AT900 — Manufacturer part number NS-343 (also NS343).

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

NS38055, SW7478, NS6837, 34980AT900, NS-343

Frequently Asked Questions

What does the NS-343 neutral safety switch do?

It allows the starter to crank only when the transmission is in Park or Neutral, helping prevent the engine from starting while in a drive gear.

Will this switch fit my vehicle?

It is a direct-fit replacement for the 2003 INFINITI Q45. Confirm fitment for your vehicle before ordering.

What numbers does this part interchange with?

It cross-references NS38055, SW7478, NS6837, and 34980AT900. Its manufacturer part number is NS-343.

What are the signs of a failing neutral safety switch?

Common signs include a no-crank condition in Park, cranking only when the shifter is jiggled, or intermittent starting. Diagnose the circuit to confirm the switch is the cause.

Is this a genuine OE part?

This is a Standard Ignition OE-replacement neutral safety switch, manufacturer part number NS-343, built as a direct-fit replacement for the listed application.

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