What size are the axle nuts on a 2012 Chevy Impala?
The outer CV axle nut on a 2012 Chevy Impala is typically 32 mm across the flats, but the exact size can vary with different hub designs or aftermarket parts. This article explains how to confirm the correct size for your specific vehicle.
Typical size and possible variations
On most 2012 Impalas with front-wheel drive, the outer CV axle nut is commonly 32 mm. However, some hub assemblies or replacements may use a different size, such as 30 mm or 34 mm. Always verify to prevent damage from using the wrong socket or misthreading.
Why the size can differ
Variations arise from changes in hub assemblies, axle designs, and aftermarket components across production runs and service parts. The exact size should be confirmed for your VIN, as it can differ by market or option packages.
To help you verify, consider these practical steps before you attempt removal or replacement.
- Consult your vehicle’s service manual or Chevrolet parts catalog for the exact axle nut size for your VIN and trim.
- Measure the nut across the flats with a caliper or a suitably sized ruler if you have the old nut off.
- Check for size markings on the nut itself if the original nut is present.
- Bring the old nut to a parts store to ensure you purchase the correct size if you’re replacing it.
Having the correct size is key to safely removing and re-installing the axle, avoiding damage to threads or the hub.
Practical steps for verification and replacement
Once you know the correct size, use the appropriate socket and follow the torque specification provided in the service manual for your exact vehicle. If replacing the nut, use a new one to ensure proper thread engagement and locking, since many axle nuts are designed for one-time use or require a locking feature such as a cotter pin or a torque-staking method.
Summary
The 2012 Chevy Impala typically uses a 32 mm outer axle nut, but verify for your specific vehicle because hub designs and replacement parts can vary. Always consult the service manual or measure the nut to confirm, and use the correct hardware and torque when reinstalling.
