Does Subaru recommend replacing all four tires?
Yes. Subaru generally advises replacing all four tires on its all-wheel-drive (AWD) models to keep tread depth and overall circumference consistent across every wheel, which helps protect the transfer case and maintain balanced handling. If you replace only one tire or tires with different wear, you risk drivetrain strain and unpredictable performance. Always check your vehicle’s manual or ask a Subaru dealer for the model-year-specific guidance.
Why Subaru emphasizes four-tire consistency on AWD models
Subaru’s AWD system relies on coordinated tire rotation and similar wheel speeds. Differences in tread depth or circumference between tires can cause torque to be distributed unevenly, potentially stressing the drivetrain and affecting stability control. Below are the key considerations that drive the four-tire replacement guidance.
- Uniform tread depth helps ensure equal rotating circumference across all wheels, which is important for AWD stability and power distribution.
- Mixing tires with different wear or models can lead to unpredictable handling and potential drivetrain wear.
- Replacing all four tires minimizes the risk of warranty or service issues related to AWD performance.
- If a single tire is replaced, many dealers and manuals recommend also replacing the others to restore symmetry, rather than leaving one tire with different wear.
In short, maintaining matched tires on an AWD Subaru aligns with how the system is designed to operate and helps protect drivetrain components over the long term.
Practical guidance for decision-making
These scenarios outline common paths and what Subaru owners should consider when deciding how many tires to replace.
- Scenario: All four tires are worn to a similar depth. Replacing all four keeps the tires uniform and is the simplest way to preserve AWD balance.
- Scenario: Only one tire is damaged or shows uneven wear. Replacing just that tire is not typically advised for AWD Subarus; replacing all four or at least ensuring the others are very close in tread depth and circumference is often recommended.
- Scenario: Tires come from the same brand and model but have different wear due to mileage. Replacing all four helps ensure consistent traction and torque distribution.
- Scenario: Budget constraints prevent four new tires at once. In some cases, a dealer may recommend replacing two tires on the same axle with matching tread depth, followed by continued monitoring and careful rotation, but this is less ideal than replacing all four.
Regardless of scenario, having a professional evaluate tread depth, tire age, and circumference is wise. They can advise whether you should replace all four or proceed with another approach that preserves AWD integrity.
Dealer and model-year considerations
Official guidance can vary slightly by Subaru model year and market. Always consult your owner's manual, or contact a Subaru retailer or certified tire technician for guidance tailored to your specific vehicle. Some models may have recommended tire specifications or AWD system updates that affect replacement strategy.
Tips for staying on the safe side
To minimize risk and maximize performance on AWD Subarus, consider the following best practices:
- Keep tires within a close tread depth range across all four wheels.
- Use the same tire brand, model, and size on all wheels whenever possible.
- Rotate tires as recommended by Subaru for your model to maintain even wear.
- Monitor tire age; older tires can lose performance even if tread depth appears adequate.
Following these steps helps ensure the AWD system operates as intended and reduces the chance of uneven wear impacting handling or safety.
Summary
Subaru’s guidance for all-wheel-drive vehicles centers on keeping tire tread depth and circumference as uniform as possible. Replacing all four tires is the simplest and most foolproof way to maintain AWD performance and protect drivetrain components. If you cannot replace all four at once, consult a Subaru dealer for model-specific recommendations and ensure any replacements are matched in size, brand, and tread depth as closely as possible. Regular maintenance, thoughtful rotation, and attention to tire age further support safe, confident driving in Subaru AWD models.
How often should you replace tires on a Subaru?
Tires: Grip, Safety, and Efficiency
Average lifespan: 40,000–60,000 miles (or 5–6 years, depending on use and climate). Signs it's time to replace: Low tread depth – Reduced traction can lead to longer stopping distances, especially in wet conditions.
Do you really have to replace all four tires on an AWD?
While it's not recommended, you may be able to replace one tire if the tread difference is minimal, but it's always best to consult a mechanic or your vehicle manual. Why do all four tires need to match on AWD? They need to match to maintain even power distribution and to prevent strain on the drivetrain.
Will Subaru replace my tires?
And when the time comes for replacement, the Factory Trained Teams at your local Subaru retailer are the best source for the specific tires your vehicle was designed to drive on. Your Subaru Retailer Has You Covered Too – All The Way Around.
Is it okay to just replace two tires?
Yes, installing four new tires is often ideal. But, when getting just two tires, putting them on the rear axle can help maximize your traction and stability, reducing the risk of accidents.
