HomeElectrical, Lighting and Body > SwitchesStandard Ignition NS-641 Neutral Safety Switch
Part #: NS-641

Standard Ignition NS-641 Neutral Safety Switch

33 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Honda and Acura, Pilot, Ridgeline, Odyssey, MDX, RDX, TL, ZDX, Accord, Crosstour, and RL
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Reliable Neutral Safety Switch for Acura and Honda Vehicles

The Standard Ignition NS-641 Neutral Safety Switch is designed to ensure safe and accurate transmission operation for select Acura and Honda models. Engineered with a durable plastic finish and bolt mount attachment, this switch provides consistent performance in critical vehicle safety systems.

  • Compatible with Acura and Honda models including Accord, Crosstour, MDX, Odyssey, Pilot, RDX, Ridgeline, RL, TL, and ZDX
  • Equipped with 9 male pin terminals and 1 female rectangular connector for secure electrical connections
  • 12-volt rated switch with a 4-inch (101.6 mm) length for precise fitment
  • Bolt mount attachment method for stable installation
  • Black face color with plastic finish for corrosion resistance

Product Details and Specifications

The Standard Ignition NS-641 Neutral Safety Switch features a bolt mount design that ensures a secure and stable fit on compatible Acura and Honda transmissions. The switch includes nine male pin terminals and a single female rectangular connector, facilitating reliable electrical connectivity within the vehicle’s safety system. Its 12-volt rating matches the electrical requirements of the listed models, while the black plastic finish offers durability against environmental factors. This switch does not include mounting hardware or gaskets, so ensure you have the necessary components for installation.

Applications and Common Issues Addressed

  • Prevents engine start in gear, enhancing vehicle safety
  • Resolves issues with the vehicle not starting or starting intermittently
  • Eliminates problems related to incorrect gear position signals
  • Helps restore proper functioning of transmission safety interlocks
  • Addresses electrical connection faults within the neutral safety circuit

Installation Notes and Tips

Installation requires removal of the old neutral safety switch and mounting the NS-641 using bolts (mounting hardware not included). Ensure the switch is aligned correctly to the transmission to avoid miscommunication of gear position. Verify all terminal connections are secure and free of corrosion. It is recommended to consult the vehicle’s service manual for specific torque specifications and wiring diagrams to ensure proper installation.

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet or exceed OEM specifications, providing reliable performance for Acura and Honda vehicles. While mounting hardware and gaskets are not included, the NS-641 switch is built with quality materials to withstand typical automotive conditions. Please refer to Standard Ignition’s warranty policy for coverage details on this neutral safety switch.

BrandStandard Ignition
Part NumberNS-641
ColorBlack
Connector GenderFemale
Connector ShapeRectangular
FinishPlastic
Mounting TypeBolt Mount
Terminal GenderMale
Terminal TypePin

This part fits 33 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersPositionNotes
2019HondaPilot3.5LV6N/A
2019HondaRidgeline3.5LV6N/A
2018HondaPilot3.5LV6N/A
2018HondaRidgeline3.5LV6N/A
2017HondaOdysseyN/A
2017HondaPilot3.5LV6N/A
2017HondaRidgeline3.5LV6N/A
2016HondaOdysseyN/A
2016HondaPilot3.5LV6N/A
2015AcuraMDXN/A
2015HondaOdysseyN/A
2014AcuraMDXN/A
2014AcuraRDXN/A
2014AcuraTLN/A
2014HondaOdysseyN/A
2013AcuraMDXN/A
2013AcuraRDXN/A
2013AcuraTLN/A
2013AcuraZDXN/A
2013HondaAccord3.5LV6N/A
2013HondaCrosstour3.5LV6N/A
2013HondaOdysseyAutomaticN/A
2012AcuraMDXN/A
2012AcuraRLN/A
2012AcuraTLN/A
2012AcuraZDXN/A
2012HondaOdysseyAutomaticN/A
2011AcuraMDXN/A
2011AcuraRL3.7LV6N/A
2011AcuraZDXN/A
2011HondaOdysseyAutomaticN/A
2010AcuraMDXN/A
2010AcuraZDXN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1S1154128900RT4003CSW538NS7043SW8739

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.