2006 Acura Rsx

The 6-speed manual transmission in the RSX Type-S and the 5-speed in the base model are known for premature synchronizer wear, particularly in 2nd and 3rd gears. Aggressive shifting and high-RPM driving accelerate the wear. Symptoms include a grinding or notchy feel when shifting into 2nd or 3rd gear, especially when the transmission is cold.

Replace the worn synchronizer rings and blocker rings for the affected gears. A complete transmission rebuild addressing all synchros is recommended since the transmission must be disassembled. Use Honda MTF-3 transmission fluid exclusively, as generic gear oils can accelerate synchro wear. Avoid speed-shifting and allow the transmission to warm up before aggressive driving.

The A/C compressor clutch on the RSX is prone to failure, producing a rattling or clicking noise when the A/C is engaged, followed by intermittent or complete loss of cooling. The compressor clutch bearing and the clutch coil are the most common failure points. Given the vehicle's age, the compressor itself may also have internal wear.

The A/C compressor clutch can be replaced separately if the compressor internals are still in good condition. However, given the vehicle's age, replacing the entire compressor assembly along with the receiver-dryer and expansion valve is more prudent. A full system flush is required if the compressor has shed debris.

The rear trailing arm compliance bushings on the RSX are a well-known wear item that deteriorates significantly by 80,000-100,000 miles. Symptoms include a clunking noise from the rear over bumps, vague rear-end handling, and excessive inner-edge tire wear on the rear tires. The rubber bushings crack and tear, allowing the trailing arm to move excessively.

Replace both rear trailing arm bushings. The Honda/Acura OEM bushings can be replaced, but aftermarket polyurethane or spherical bushing upgrades are popular for RSX owners who want improved rear-end precision. Hardrace and Energy Suspension offer well-regarded replacements. A rear wheel alignment is essential after bushing replacement.

The RSX's catalytic converter is easily accessible from underneath the vehicle, making it a frequent target for theft. Independent of theft, the catalytic converter can also fail internally after 150,000+ miles, triggering a P0420 catalyst efficiency code. California-compliant (CARB) replacement converters are significantly more expensive than federal-standard units.

Install a catalytic converter shield or cage to deter theft. If the converter has failed, replace it with a CARB-compliant unit if required in your state. Address any upstream issues causing rich running conditions (such as oil burning or oxygen sensor failure) before installing the new converter. Aftermarket cat-back exhaust systems are also popular on the RSX.

The power window regulators on the RSX, particularly the driver side, are prone to failure due to the cable-style regulator design. The window may move slowly, make grinding noises, or stop working entirely in the down position. The regulator cables can fray and break, and the motor can burn out from the added strain of a binding cable.

Replace the window regulator assembly, which includes the motor and cable mechanism as a unit. OEM and aftermarket replacements are readily available. Apply white lithium grease to the window tracks during installation to reduce friction and extend the new regulator's life. The door panel must be removed for access.