The wheel studs on a 2009 Honda Civic are 12 mm in diameter with a 1.5 mm thread pitch (M12x1.5).
This size applies to the standard 2006–2011 Civic models in most markets, including sedans and coupes. The performance-oriented Si variant shares the same stud size, though wheel and hub configurations can differ by trim and aftermarket choices.
Specs at a glance
Below is a concise summary of the key measurements and compatible hardware for the wheel studs and lug nuts on this model.
- Stud diameter: 12 mm
- Thread pitch: 1.5 mm (M12x1.5)
- Thread type: Metric
- Lug nut seat: 60-degree conical
- Bolt pattern (wheel hub): 5x114.3 mm
Because aftermarket wheels can alter fitment, always verify lug nut style and torque requirements with the wheel manufacturer and your vehicle’s manual.
Installation and maintenance tips
When replacing wheel studs or installing new lug nuts, follow these guidelines to ensure safety and proper fitment.
- Torque lug nuts to the manufacturer's specification, typically in the range published for Civics, and use a calibrated torque wrench.
- Inspect studs for wear, stretching, or corrosion; replace any damaged studs before driving.
- Use the correct lug nut type (12 mm x 1.5 thread) and avoid mixing lug nuts from different vehicles or wheel sets if not specified by the wheel manufacturer.
- When replacing studs, use appropriate tools and ensure the new studs are fully seated and clean on both ends to maintain proper alignment.
Regular inspection and adherence to torque specs help maintain wheel safety and the longevity of studs and lug nuts.
Notes for specific variants
All 2009 Civics generally share the same stud size, but some trim levels or aftermarket wheel packages can introduce differences in wheel hub geometry or lug-seat requirements. Always confirm with the vehicle’s VIN or the wheel manufacturer if you’re installing non-OEM wheels.
Summary
For a 2009 Honda Civic, expect 12 mm diameter wheel studs with a 1.5 mm thread pitch (M12x1.5), used with standard lug nuts and a 5x114.3 mm bolt pattern. Verify exact fitment with your trim level and follow torque specifications when replacing components or upgrading wheels.