Can you replace just one Subaru tire?
Yes, you can physically replace a single tire, but on Subaru all‑wheel‑drive (AWD) models it is generally not recommended. The safer, more reliable approach is to replace two tires on the same axle or all four to keep tire wear and rolling circumference consistent and protect the drivetrain.
Why tire replacement on AWD Subarus matters
Subaru’s Symmetrical AWD system relies on coordinated tire movement between all four wheels. When one tire differs significantly in tread depth or circumference from the others, the system can experience uneven torque distribution, which over time may contribute to drivetrain wear, handling quirks, or warning lights. For that reason, many dealers and tire professionals advise minimizing differences among the tires whenever possible.
What Subaru recommends for AWD tire replacement
Official guidance for AWD Subaru models centers on maintaining similar tires across all four corners. When a single tire must be replaced, the general recommendation is to either replace another tire on the same axle or replace all four tires to preserve even circumference and wear. Always consult your owner's manual or a Subaru dealer for model‑specific advice, as recommendations can vary by model year and market.
Practical choices if you need to replace a single tire
Below are the common approaches used by owners and shops when replacing only one tire on an AWD Subaru. Each option has trade‑offs in terms of cost, simplicity, and drivetrain protection.
- Replace only that one tire, ensuring you match size, brand, model, and tread pattern as closely as possible and keep wear differences minimal.
- Replace two tires on the same axle (the more protective option for AWD systems and often the preferred choice when one tire is worn and the others are reasonably fresh).
- Replace all four tires (the simplest way to guarantee identical circumference and wear, but the most costly).
In practice, two tires on the same axle is the most commonly recommended compromise when only one tire must be replaced, provided the other tires are nearly new and have similar tread depth.
How to minimize risk if you replace just one tire
If circumstances force you to replace a single tire, follow these guidelines to reduce potential AWD issues and prolong drivetrain life.
- Choose an identical tire in size, speed rating, and tread pattern to the remaining three tires, and aim for as close a tread depth as possible.
- Verify the tread depths of all tires; if the gap between the new tire and the oldest tire exceeds about 2/32 of an inch (1.6 mm), consider replacing another tire or two to reduce risk.
- Have the vehicle inspected for proper balance and alignment after tire changes, and watch for handling changes or warning lights on the dash.
- If your Subaru has active safety features (like EyeSight or AWD indicators), note that manufacturers sometimes advise avoiding sudden tire size or circumference differences that could impact these systems.
These steps are aimed at protecting the AWD drivetrain and ensuring predictable handling. When in doubt, a dealership or independent shop with Subaru experience can guide you to the best option for your model and driving conditions.
A note for different Subaru models and markets
While the general principle is consistent across Subaru AWD vehicles, some model years or markets may have slightly different recommendations or service notes. Always check the latest owner’s manual or contact a local Subaru dealer for model‑specific guidance, especially if your vehicle uses advanced safety or driver assistance features that rely on wheel speed sensing and precise tire dimensions.
Summary
Replacing a single tire on a Subaru’s AWD system is possible but not ideal. To minimize drivetrain wear and ensure consistent handling, replacing two tires on the same axle or all four tires is generally recommended. If you must replace just one, match the tire size and tread as closely as possible, check the wear on the other tires, and consider a professional evaluation to decide whether a second tire replacement or an all‑four replacement is warranted. When in doubt, follow the manufacturer’s guidance and seek a qualified technician’s advice.
