Performance Ignition Coils for Acura RL (2001-2003) 3.5L

High-Output Performance Ignition Coils for 2001-2003 Acura RL (C35A / KA9)

Direct replacement performance ignition coils engineered to restore proper spark voltage and eliminate misfires on the KA9 Acura RL.

The Stock C35A Ignition Weakness

The factory ignition coils on the 3.5L C35A V6 are highly susceptible to thermal degradation over time. Positioned directly atop the valve covers, these OEM units endure continuous heat cycles that eventually break down the internal epoxy potting and primary copper windings. This thermal stress leads to internal voltage leaks, intermittent misfires under load, rough idling, and incomplete combustion that frequently triggers P0300-series diagnostic trouble codes. As internal electrical resistance increases with age, spark energy weakens, negatively impacting fuel economy, throttle response, and overall engine efficiency.

The Engineering Solution

This set of 6 performance ignition coils resolves OEM thermal vulnerabilities through upgraded materials and an optimized electrical design. Manufactured with high-dielectric epoxy and high-grade copper internal windings, these coils provide a hotter, more consistent spark duration compared to deteriorating stock units. The exterior housing utilizes a high-heat resistant polymer construction to prevent the micro-cracking commonly associated with extreme under-hood temperatures. Enhanced silicone boot insulation ensures proper arc suppression, delivering maximum voltage directly to the spark plug without grounding out or tracking. This restores reliable ignition timing, improves cold start reliability, and stabilizes the idle across the entire RPM range.

Technical Specifications

Compatibility & Cross-Reference

• 921-2012
• 5C1013
• 5C1461
• IC242SB
• UF242T
• 673-2310
• 23-0401
• 52-1627
• 52-1791
• C1221SPEC
• EBC1476
• 26C1007
• CUF242
• 2IGC0183

The Acura Precision Standard

Engineered for exacting JDM reliability, these ignition coils restore the factory-smooth power delivery and quiet operation expected from the flagship RL, ensuring peak combustion efficiency and a dashboard free of check engine lights.