The 2004 Acura RSX is a compact 2-door sport coupe (hatchback-style liftgate) built for drivers who want a fun, high-revving car with everyday usability. It sits in Acura’s entry-level performance spot for the early 2000s, offering sporty handling, strong build quality, and available 6-speed manual gearboxes. This model is part of the first-generation RSX (2002–2006), and 2004 falls in the middle of the run with the familiar K-series engine character that helped make the RSX popular with enthusiasts. It’s ideal for commuters who still want a driver’s car, plus buyers who value Honda/Acura engineering and aftermarket support.

- Two engine choices: RSX base models use a 2.0L i-VTEC inline-4 (K20A3) rated around 160 hp, while the RSX Type-S uses a 2.0L i-VTEC inline-4 (K20A2) rated around 200 hp with a higher redline and more aggressive tuning. - Transmission options include a 5-speed manual or 5-speed automatic on the base model, and a 6-speed manual on the Type-S for the most engaging performance and stronger enthusiast demand. - Sport-tuned chassis with quick steering response and a lightweight, nimble feel that makes the RSX a standout among early-2000s compact coupes. - Hatchback practicality: the liftback design and fold-down rear seats give it more cargo versatility than many coupes, making it easier to live with daily. - Strong aftermarket and parts availability: the K-series platform is widely supported, which helps with both performance upgrades and sourcing replacement components.

Searches for “2004 Acura RSX problems,” “2004 Acura RSX reliability,” and “2004 Acura RSX common issues” often point to a similar set of age-and-mileage-related concerns. Overall reliability is commonly considered above average for its class when maintained, but these are issues to watch for: - Manual transmission synchro wear (especially Type-S): Many owners report 2nd gear grind or difficulty engaging gears, often showing up anywhere from roughly 80,000–150,000 miles depending on driving style and fluid change history. Ignoring it can worsen shift quality and increase repair cost. - Clutch wear and hydraulic issues: A higher-mile RSX may need a clutch around 100,000–150,000 miles (sometimes earlier with aggressive driving). Some owners also report clutch master/slave cylinder wear leading to inconsistent pedal feel or difficulty shifting. - Suspension and steering component aging: As mileage climbs, worn struts, sway bar end links, and bushings can cause clunks over bumps, vague handling, or uneven tire wear. These symptoms commonly appear after 100,000 miles, especially on cars driven on rough roads. - Air conditioning performance problems: Like many older Hondas/Acuras, A/C issues can pop up over time, including weak cooling from refrigerant leaks or compressor-related wear. It’s not universal, but it’s common enough to check carefully on any used example.