Subaru Outback AWD Tire Matching and Service

Outbacks use full-time all-wheel drive, so power goes to all four wheels during normal driving. If one tire is noticeably larger or smaller in rolling diameter, that wheel turns at a different speed. The AWD system then works constantly to manage the difference, which can add wear to drivetrain parts.

Subaru's owner materials stress using tires of the same size, type and brand, with tread wear kept close across all four. Check your manual for the exact guidance.

We record tread depth on all four and show you before recommending. See AWD vehicles.

Follow Subaru's maintenance schedule, which for many Outbacks lines up with each oil service. Regular rotation keeps tread depth even across all four, which is what the AWD system needs.

Skipped rotations are the main reason Outback owners get told they need four tires when only one was damaged. The front and rear sets drift apart, and a single new tire no longer matches. A rotation reminder on every oil sticker helps. See tire rotation and balancing.

The Wilderness trim adds more ground clearance and all-terrain tires from the factory. They grip better on dirt roads toward the mountains and desert, but are louder and often wear faster on pavement.

If your Wilderness is mostly a commuter, a quieter all-season can make sense. If you head up forest roads often, sticking with all-terrain tires is reasonable. Either way, keep all four matched and check for cuts after rough trips. See tire wear patterns.

Most Outbacks use a CVT. Normal behavior includes steady engine rpm while speeding up. Shudder, whine or slipping feel should be checked. We road test, scan for codes and follow Subaru's fluid guidance. See transmission service.

Outback brakes wear like any midsize wagon. Front pads usually wear first. Roof loads and mountain trips add heat. We measure and photograph before quoting.

A few more items round out Outback care:

• Oil: viscosity on the cap, with level checked at each visit. Turbo XT models deserve close attention to oil.
• Battery: heat and accessory loads shorten its life.
• Coolant and hoses: checked before summer.
• Cabin filter: for AC airflow.
• Driver-assist camera: Outbacks with Subaru's windshield-mounted camera system may need attention after certain repairs or alignment changes. We note that when it applies instead of skipping it.

Everything is listed as need or want with photos.

Outbacks haul a lot of gear to trailheads and ski areas, and those trips add weight, heat and rough roads. Check the tires, brakes, cooling system and roof load before you leave. A matched set of tires with healthy tread matters most, because the AWD system depends on it.

Before the trip:

• Tires: matched tread depth, pressure set for the load per the placard and manual, no sidewall cuts
• Spare: many Outbacks carry a compact temporary spare. Respect its speed and distance limits, and keep that use short on a full-time AWD car.
• Brakes: pads measured before long mountain descents
• Cooling: coolant level and hoses checked before desert heat
• Roof rack: loaded within the limit listed in the manual
• Wipers and washer fluid: ready for dust and sudden weather
• Traction devices: if you head where chains may be required, confirm which types your manual allows

After the trip, rinse the underbody, look for tire damage, and have alignment checked if the steering wheel is no longer centered. See our seasonal tire tips.

Judge a used Outback on tire matching, CVT behavior, oil use and service records. Mismatched tires on a full-time AWD wagon are a warning sign about past care. An inspection before buying shows what is visible now and what may need attention soon.

Search the VIN at nhtsa.gov/recalls (opens in a new tab). A pre-purchase inspection includes photos and a road test. It is not a warranty and cannot promise that nothing will fail later.