Parts for your 2021 Subaru Outback-Centre bearing

Centre Bearing on the 2021 Subaru Outback: What You Need to Know

The 2021 Subaru Outback is a popular flagship wagon known for its all-wheel-drive system and rugged versatility. When it comes to the drivetrain layout, many people wonder if this model includes a centre bearing as part of its design. After referencing technical sources and Subaru's official service information, it is clear that the 2021 Subaru Outback does not actually use a centre bearing in its drivetrain system. Here's why that is, and what it means for maintenance and servicing.

First off, a centre bearing is typically found in vehicles with a two-piece driveshaft setup. This design splits the driveshaft into sections for managing length or positioning, with a support bearing mounted somewhere along the shaft to reduce vibration and provide stability. It commonly shows up in long wheelbase rear-wheel-drive or four-wheel-drive vehicles where the transmission output shaft and the differential input shaft are separated by a considerable distance.

Now, the 2021 Subaru Outback uses a symmetrical all-wheel-drive system paired with a transversely mounted flat-four engine. The key here is the layout of the drivetrain. Instead of a long, longitudinal driveshaft requiring multiple segments, Subaru's system employs constant velocity (CV) joints and driveshafts that directly transfer power to the front and rear differentials without needing a two-piece shaft. This arrangement eliminates the need for a centre bearing, which would otherwise be necessary to support an intermediate shaft.

This is a deliberate design choice by Subaru. Keeping the drivetrain more compact and integrated reduces the number of moving parts, meaning fewer components that can wear out or need maintenance. With no centre bearing to worry about, servicing the driveshaft and related drivetrain components becomes simpler and generally more reliable for the average Aussie driver.

For Subaru Outback owners curious about driveshaft or axle-related maintenance, the focus should be on CV joint boots and the condition of the axle shafts themselves. Regular inspections of the boots for cracks or tears and ensuring there are no annoying clicking noises during tight turns can go a long way in avoiding more expensive repairs down the track.

Although a centre bearing is not fitted on this vehicle, understanding the function and maintenance of such a component can be helpful for those driving other cars built around a two-piece driveline. The centre bearing supports the intermediate shaft of the driveshaft, providing stability and reducing vibrations. If it wears out or fails, drivers commonly experience noticeable vibrations, clunking noises, or visible shaft play, which affects driving comfort and potentially damages other drivetrain parts.

In vehicles with centre bearings, servicing usually includes inspection during routine maintenance intervals. Mechanics will check for signs of wear on the rubber supports or the bearing itself. If there's excessive movement or the bearing is noisy, replacement is typically recommended. This involves removing the driveshaft assembly to get the centre bearing out and attaching a new one, often done alongside other driveline repairs to reduce labour costs.

In essence, the lack of a centre bearing in the 2021 Subaru Outback is an advantage in terms of durability and ease of maintenance. There's no need to schedule specific centre bearing replacements or worry about deteriorating rubber supports affecting your driveshaft performance. That said, staying on top of driveshaft and axle inspections is still important, as these components take the brunt of power delivery to the wheels and endure tough Aussie conditions, from dirt roads to long highway drives.

For anyone considering aftermarket upgrades or modifications that could alter the driveline of their Subaru Outback, it's worth consulting an experienced mechanic or Subaru specialist. Changes that might affect shaft lengths or alignment could theoretically introduce the need for additional supports such as a centre bearing. However, straight out of the showroom and within Subaru's design parameters, a centre bearing is not relevant or fitted on the 2021 Outback.