Standard Ignition NS-343 Neutral Safety Switch
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Standard Ignition

Standard Ignition NS-343 Neutral Safety Switch

Brand Standard Ignition NS-343
Color Black
Connector Gender Female
Finish Metal, Plastic
Terminal Gender Male
Terminal Type Pins
Fits INFINITI · 1 vehicle

Push-in design. Installs without a connector for a straightforward electrical replacement.

Two-pin terminals. Simple 12V switching with a compact, direct-fit layout.

Plastic housing. Lightweight construction with a metal-and-plastic finish.

Cross-references Standard Ignition NS-343, 34980AT900 and NS6837 for the same application. See all 5.

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Not what you need? See all Neutral Safety Switch options

Neutral Safety Switch for 2003 Infiniti Q45

Standard Ignition NS-343 is a 12V neutral safety switch built with a black face, plastic housing, and metal/plastic finish. It uses a 2-pin, male terminal design with a push-in attachment method and a 13.875 in wiring harness for direct electrical connection.

Fits 2003 Infiniti Q45, N/A. This Standard Ignition NS-343 neutral safety switch is a direct-fit electrical replacement for the listed application and is identified by part number NS-343.

Key Features

  • Neutral safety switch for automatic transmission starting circuit control
  • 12V electrical specification
  • 2 terminal pins with male terminals
  • Push-in attachment method
  • Black face color with plastic construction and metal/plastic finish
  • 13.875 in wiring harness length
  • Cross-reference part numbers include 34980AT900 and NS6837 for the same application

Application Details

Standard Ignition NS-343 is listed for 2003 Infiniti Q45, N/A. It is used in the vehicle’s starting interlock circuit to help confirm the transmission is in Park or Neutral before the engine will crank. For shoppers searching for a 2003 Infiniti Q45 neutral safety switch, NS-343 provides a fitment-specific replacement option.

The part number NS-343 is also useful when cross-checking replacement needs against OE-style references and interchange listings. If you are sourcing a neutral safety switch for Infiniti Q45 electrical repair work, this part number helps narrow the correct application quickly.

Common Issues It Can Address

  • No-crank condition when the shifter is in Park or Neutral
  • Intermittent starting caused by a worn transmission range switch circuit
  • Starter engagement only in certain shifter positions
  • Electrical continuity problems at the neutral safety switch connector area
  • Transmission start-inhibit faults related to switch wear or connection issues

Installation Notes

Verify the connector style, terminal count, and push-in mounting style before installation. Inspect the harness, terminals, and surrounding shift linkage area for wear, corrosion, or damage before replacing the switch. Confirm proper shifter adjustment after installation so the starting circuit operates correctly in Park and Neutral.

Quality Assurance

Standard Ignition supplies electrical replacement parts for service applications, and NS-343 is built to match the listed fitment and terminal configuration for the 2003 Infiniti Q45.

Related reading

This part fits 1 vehicle
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2003INFINITIQ45AutomaticN/A—
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Standard Ignition — NS-34334980AT900NS6837NS38055SW7478