Standard Ignition JR-190 Distributor Rotor

Distributor Rotor for Nissan and INFINITI Applications

Standard Ignition JR-190 is a bolt-on distributor rotor built with a plastic rotor body and brass contact material. It is a direct replacement ignition component for select Nissan, INFINITI, and Mercury vehicles that use a distributor-style ignition system.

Compatible With 1996-2004 Nissan Pathfinder, 1997-2000 INFINITI QX4, 1999-2004 Nissan Frontier, 2000-2004 Nissan Xterra, 1999-2002 Nissan Quest, and 1999-2002 Mercury Villager applications.

• Bolt-on mount type for direct distributor rotor replacement
• Brass contact material for consistent spark transfer
• Plastic rotor construction with black finish
• Includes distributor rotor and bolt hardware as listed in the product attributes
• Standard Ignition JR-190 replacement part number for catalog matching

Detailed Product Overview

The Standard Ignition JR-190 distributor rotor is designed for distributor and magneto ignition systems that require a bolt-on rotor with brass contacts. Its black plastic housing supports the rotor assembly while the brass contact helps carry ignition voltage through the distributor cap to the correct cylinder firing sequence. This part is a practical replacement for Nissan Pathfinder, Nissan Frontier, Nissan Xterra, Nissan Quest, INFINITI QX4, and Mercury Villager vehicles within the listed model years.

This part cross-references Walker Products 926-1038 and CSF 3962 for the same application. The Standard Ignition JR-190 part number is also useful when matching catalog listings across ignition component references.

Common Problems This Part Can Address

• Misfire caused by worn rotor contact surfaces
• Hard starting related to weak distributor spark transfer
• Intermittent ignition performance from a damaged rotor
• Engine hesitation tied to inconsistent spark routing
• Distributor service needs during ignition tune-up work

Installation Notes and Tips

Verify distributor cap and rotor orientation before removal, then install the JR-190 using the bolt-on mounting point and supplied bolt hardware. Inspect the distributor cap, ignition wires, and related ignition components at the same time so the replacement rotor works with clean contact surfaces. Confirm vehicle year, make, and model against the fitment list before installation.

Quality Assurance

Standard Ignition is a recognized ignition parts brand with cataloged OE-style replacement coverage for distributor service applications. JR-190 is built to match the listed fitment and component specifications for the vehicles shown above.