Standard Ignition NS-51 Neutral Safety Switch
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Standard Ignition

Standard Ignition NS-51 Neutral Safety Switch

Brand Standard Ignition NS-51
Color Black, Gray
Connector Gender Female
Finish Metal, Plastic
Terminal Gender Male
Terminal Type Pins
Fits Mitsubishi, Dodge, Eagle, Chrysler, and Plymouth · 78 vehicles

Copper alloy conductors. Deliver superior conductivity with low resistive losses.

100% tested. Verifies mechanical and electrical switching performance.

Robust design. Built with high-grade materials for demanding service work.

Cross-references 1S4940, 53-31501 and 4671017 for the same application. See all 9.

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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Neutral Safety Switch options

Neutral Safety Switch for Chrysler and Dodge Applications

Standard Ignition NS-51 is a neutral safety switch built for Chrysler, Dodge, Plymouth, and Mitsubishi vehicles that use a 3-pin electrical connection. It is used in neutral position applications across a wide range of 1990-1999 models, including Chrysler LeBaron, Dodge Caravan, and Mitsubishi Eclipse.

Key Features

  • Black and gray housing with metal and plastic finish
  • Female connector with 1 connector interface
  • 3 male pin terminals for secure electrical contact
  • Copper alloy conductors for low-resistance electrical flow
  • 100% tested for mechanical and electrical switching performance
  • Built with robust materials for service-professional use

Product Details

The Standard Ignition NS-51 neutral safety switch is engineered for vehicles that require accurate park and neutral circuit operation. Standard Ignition uses copper alloy conductors to support strong electrical conductivity and reduced resistive loss, while the switch construction is tested to verify both switching action and electrical performance. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Part number NS-51 is also referenced for multiple Chrysler, Dodge, Plymouth, and Mitsubishi fitments, including Chrysler Town & Country, Dodge Spirit, and Mitsubishi Eclipse.

What This Part Helps Address

  • Engine starts only in certain gear positions
  • No-crank condition related to park or neutral circuit operation
  • Intermittent starter engagement
  • Transmission range signal issues tied to the neutral safety circuit
  • Electrical switching faults at the selector interface

Installation Notes and Tips

  • Verify the vehicle’s transmission range and connector style before installation.
  • Confirm the 3-pin terminal layout matches the original switch.
  • Inspect the harness connector for corrosion, bent pins, or heat damage.
  • Use the vehicle’s service information to align the switch correctly in neutral position applications.
  • After installation, test starting operation in park and neutral to confirm proper function.

Quality Assurance

Standard Ignition builds this switch with durable materials and conducts full mechanical and electrical testing before release. The design reflects decades of product development focused on technician requirements and dependable service performance.

Related reading

This part fits 78 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersPositionNotes
1999MitsubishiEclipse—2.0LL4N/A—
1998MitsubishiEclipseAutomatic——N/A—
1997MitsubishiEclipseAutomatic——N/A—
1996DodgeAvengerAutomatic——N/A—
1996MitsubishiEclipseAutomatic——N/A—
1995ChryslerCirrus———N/ANeutral Position
1995ChryslerLeBaronAutomatic——N/ANeutral Position
1995ChryslerSebring———N/ANeutral Position
1995ChryslerTown & Country———N/ANeutral Position
1995ChryslerVoyager———N/A—
1995DodgeAvenger———N/ANeutral Position
1995DodgeSpiritAutomatic——N/ANeutral Position
1995DodgeStratus———N/ANeutral Position
1995MitsubishiEclipse———N/A—
1995PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1995PlymouthVoyagerAutomatic——N/ANeutral Position
1994ChryslerLeBaronAutomatic——N/A—
1994ChryslerTown & Country———N/ANeutral Position
1994ChryslerVoyager———N/A—
1994DodgeCaravanAutomatic——N/ANeutral Position
1994DodgeGrand CaravanAutomatic——N/ANeutral Position
1994DodgeShadowAutomatic——N/ANeutral Position
1994DodgeSpiritAutomatic——N/ANeutral Position
1994DodgeStealthAutomatic——N/A—
1994PlymouthAcclaimAutomatic——N/ANeutral Position
1994PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1994PlymouthVoyagerAutomatic——N/ANeutral Position
1993ChryslerDaytonaAutomatic——N/A—
1993ChryslerImperial———N/ANeutral Position
1993ChryslerLeBaronAutomatic——N/A—
1993ChryslerNew Yorker———N/ANeutral Position
1993ChryslerTown & Country———N/ANeutral Position
1993DodgeCaravanAutomatic——N/ANeutral Position
1993DodgeDaytonaAutomatic——N/ANeutral Position
1993DodgeGrand CaravanAutomatic——N/ANeutral Position
1993DodgeShadowAutomatic——N/ANeutral Position
1993DodgeSpiritAutomatic——N/ANeutral Position
1993DodgeStealthAutomatic——N/A—
1993PlymouthAcclaimAutomatic——N/ANeutral Position
1993PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1993PlymouthVoyagerAutomatic——N/ANeutral Position
1992ChryslerDaytonaAutomatic——N/A—
1992ChryslerImperial———N/ANeutral Position
1992ChryslerLeBaronAutomatic——N/A—
1992ChryslerNew Yorker———N/ANeutral Position
1992ChryslerTown & Country———N/ANeutral Position
1992DodgeCaravanAutomatic——N/ANeutral Position
1992DodgeDaytonaAutomatic——N/ANeutral Position
1992DodgeGrand CaravanAutomatic——N/ANeutral Position
1992DodgeShadowAutomatic——N/ANeutral Position
1992DodgeSpiritAutomatic——N/ANeutral Position
1992DodgeStealthAutomatic——N/A—
1992PlymouthAcclaimAutomatic——N/ANeutral Position
1992PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1992PlymouthVoyagerAutomatic——N/ANeutral Position
1991ChryslerDaytonaAutomatic——N/A—
1991ChryslerImperial———N/ANeutral Position
1991ChryslerLeBaronAutomatic——N/A—
1991ChryslerNew Yorker———N/ANeutral Position
1991ChryslerTown & Country———N/ANeutral Position
1991DodgeCaravanAutomatic——N/ANeutral Position
1991DodgeDaytonaAutomatic——N/ANeutral Position
1991DodgeGrand CaravanAutomatic——N/ANeutral Position
1991DodgeSpiritAutomatic——N/ANeutral Position
1991PlymouthAcclaimAutomatic——N/ANeutral Position
1991PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1991PlymouthVoyagerAutomatic——N/ANeutral Position
1990ChryslerImperial———N/ANeutral Position
1990ChryslerLeBaronAutomatic——N/A—
1990ChryslerNew Yorker———N/ANeutral Position
1990ChryslerTown & Country———N/ANeutral Position
1990DodgeCaravanAutomatic——N/A—
1990DodgeDaytonaAutomatic——N/A—
1990DodgeGrand Caravan———N/APark/Neutral Position
1990DodgeSpiritAutomatic——N/ANeutral Position
1990PlymouthAcclaimAutomatic——N/ANeutral Position
1990PlymouthGrand VoyagerAutomatic——N/ANeutral Position
1990PlymouthVoyagerAutomatic——N/ANeutral Position
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
1S494053-31501467101788923259CR407MO4671017NS98NS6489S9222