What size is the axle nut on a 2019 Subaru Impreza?
The axle nut size on a 2019 Subaru Impreza is 30 millimeters across the flats. This size is used on the front axle in most configurations, but always verify with the official service manual for your exact vehicle to account for trim or aftermarket components.
What the 30 mm size means for maintenance
The 30 mm measurement refers to the external hex dimension that fits a 30 mm socket. With the Impreza’s front CV axle assembly, a 30 mm nut secures the axle to the wheel hub and must be torqued to the manufacturer’s specification to ensure proper preload and hub integrity. Using the correct socket helps prevent rounded corners and damage to the nut or axle stub.
Torque guidelines and replacement considerations
When reinstalling the front axle nut on a 2019 Impreza, technicians typically tighten to a high torque figure in the vicinity of roughly 170–190 ft-lb (230–260 Nm). Some sources may vary slightly by model year or AWD configuration, so it is essential to consult the Subaru factory service bulletin or the vehicle’s repair manual for the exact number. If a new axle nut is recommended by Subaru, replace it rather than reusing the old one to ensure proper locking and preload.
Why torque accuracy matters
Accurate torque ensures the CV axle is securely seated and prevents hub or joint loosening, which can cause vibration, noise, or drivetrain damage. Over- or under-torquing can compromise safety and long-term reliability.
One-time use nut policy
Many Subaru front axle nuts are designed for single-use and should be replaced with a new nut when reassembling. Reusing a worn or previously torqued nut can result in improper clamping force and a compromised fastener.
Verification and potential variations
While 30 mm is standard for most 2019 Impreza front axles, occasional variations can occur due to trims, aftermarket hubs, or previous repairs. If you encounter a nut that does not fit the 30 mm socket, measure across the flats with a caliper or verify the part number in the service documentation. For a precise answer, check the VIN-specific Subaru repair manual or contact a dealer service department.
Summary
In summary, the typical axle nut size for a 2019 Subaru Impreza is 30 mm across the flats on the front axle. Always verify torque specifications from the official service documentation and use a new nut when replacing to maintain proper hub preload and drive reliability. If in doubt, consult a qualified technician for accurate measurements and procedure.
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.
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 rear axle nut on a 2019 Subaru Impreza?
axle nut is 32mm.
