What size is the hub nut on a Subaru Impreza?
The hub nut size isn’t fixed across all years and trims of the Impreza. In practice, most front axle hub nuts use either a 30 mm or 32 mm socket, depending on the generation and market. Always verify the exact size for your specific car before attempting replacement.
Understanding hub-nut size variability
The nut that secures the CV axle to the wheel hub can change with design revisions and regional specifications. Even within the same model name, different years or trims may require different tools. This is why a universal answer doesn’t apply to every Subaru Impreza.
Common front axle nut sizes by generation
Here are typical sizes you may encounter, kept broad to reflect regional variations and model-year differences. Use this as a guide, not a guarantee for your exact vehicle.
- Early generation Impreza (approximately 1992–2000): commonly a 30 mm front axle nut
- Mid-generation Impreza (approximately 2001–2007): often a 32 mm front axle nut, with some trims still using 30 mm
- Late-generation and newer Impreza (approximately 2008–2016): a mix of 30 mm and 32 mm depending on model and market
- Current-generation Impreza (approximately 2017–present): typically around 30 mm, but verify for your exact car
Because revisions and regional specifications can affect the exact size, always confirm with official documentation for your vehicle. This list provides orientation rather than a guaranteed spec for every unit.
How to verify the exact size for your car
To ensure you have the correct tool and avoid damaging the nut, follow these steps tailored to your specific Impreza.
- Identify your exact year, model, and trim, and then consult the official service manual or Subaru’s parts catalog for the front axle nut specification.
- Inspect the existing nut: measure across the flats with calipers or a ruler, or try a socket that fits flush without wobble to confirm the size.
- Check a parts diagram or dealer database using your VIN to confirm the precise nut size for your axle.
- If replacing, use the size specified by Subaru for that year/model and apply the recommended torque during reassembly (refer to the service manual).
Following these steps ensures you use the correct socket size and torque, reducing the risk of cross-threading or improper fastening.
Safety and installation tips
Hub nuts are critical for wheel retention and CV joint integrity. When removing or reinstalling, use proper restraints, follow torque specs, and consider having a qualified technician perform the job if you’re uncertain. Always recheck torque after an initial test drive if the manual advises it.
Summary
The hub nut size on a Subaru Impreza varies with year, generation, and market, but the two most commonly encountered front axle sizes are 30 mm and 32 mm. To determine the exact size for your vehicle, consult the official service manual or Subaru parts diagrams for your specific year and trim, or measure the nut directly and match it to a socket. Using the correct size and torque is essential for safe, reliable operation.
What size is the axle nut socket on a Subaru Impreza?
The Subaru Impreza axle nut socket size is typically 32mm for most modern models, while earlier models may use a different size, such as the 35mm socket for some aftermarket axles. It is always best to check the specific size for your vehicle's year and model before starting the job.
This video demonstrates how to replace the front CV axle on a Subaru Impreza, including removing the axle nut: 1mTRQYouTube · Dec 6, 2023
Socket size by model year
- Most modern models (2004-present): Use a 32mm socket.
- Older models (1993-2003): Use a 32mm socket for newer models and a 35mm socket for some older ones, though 32mm is more common.
- Aftermarket axles: May require a different socket size, such as a 35mm socket.
Additional information
- It is recommended to use a deep socket for axle nuts, as they can be very long.
- A 32mm socket is a good starting point for most modern models, but it's always best to confirm before buying any new tools.
- Some models may require a different size socket, such as a 35mm socket, depending on the model and year.
What size is the axle nut on a 2003 Subaru Impreza?
Subaru (OEM) Axle Nut (22x1. 5mm), 1993-2003 Impreza (All)
What size are the nuts on a Subaru Impreza?
12mm x 1.25
The lug nut size on most Subarus is 12mm x 1.25. This includes models like the Impreza, Legacy, Outback, Forester, Crosstrek, and newer WRX/STi models. It's important to stick with OEM Subaru lug nuts or get high-quality aftermarket nuts in the proper size.
What size socket for axle nut?
The size of the socket for an axle nut varies by vehicle, but common sizes are 30mm, 32mm, 35mm, and 36mm. It is essential to check your vehicle's specific manual for the correct size, as it can differ between models and may have been changed if the axle has been replaced.
- Common metric sizes: 30mm, 32mm, 33mm, 34mm, 35mm, and 36mm are frequently used, says JustAnswer, Reddit users, Parts Avatar, and Home Depot.
- How to be sure: The most reliable method is to consult your car's owner's manual or a repair manual specific to your make and model to confirm the correct size and torque specifications.
- Socket material: For high torque applications, such as loosening or tightening the axle nut, use a strong, impact-rated socket made from materials like chrome-molybdenum steel to avoid damage to the socket or the nut.
