Honda Civic Si years to avoid and best years

Known issues for this generation

Honda's Technical Service Bulletin 23-037 (July 2023) and a subsequent NHTSA Engineering Analysis documented a defect in the electric power steering (EPS) gearbox fitted across the 2022-2023 Civic lineup, including the Si; the bulletin lists a Si-specific replacement gearbox part number. NHTSA opened Preliminary Evaluation PE23-005 on March 17, 2023 and upgraded it to Engineering Analysis EA23003 on November 29, 2023. The gearbox contains a worm gear and a worm wheel, and per Honda the annealing and conditioning processes left internal stress and strain in the worm wheel; that strain was released slowly over the vehicle's first few months on the road, deforming the teeth of the worm wheel and producing a momentary increase in steering effort, most often in cold weather after driving in a straight line for a period. Honda escalated the fix to Safety Recall 24V744 in October 2024, covering the 2022-2025 Civic in all trims including the Si. Honda attributes the recall condition to an improperly produced worm wheel that can swell in use and thin the grease film between the worm wheel and worm gear, combined with worm gear spring preload set too high; the resulting friction can increase steering effort. Dealers replace the gearbox's internal spring, spring seat and end cap and apply grease to the worm gear.