Parts for your 2018 Subaru Xv-Centre bearing

Centre Bearing on the 2018 Subaru XV: Understanding Its Role and Maintenance

The 2018 Subaru XV is a popular compact SUV known for its reliability and the well-regarded Subaru Symmetrical All-Wheel Drive system. When it comes to drivetrain components like the centre-bearing, there is often some confusion about whether this part is used or necessary on this model. Technically speaking, the 2018 Subaru XV does not feature a centre-bearing within its drivetrain configuration.

The reason for the absence of a centre-bearing in the 2018 Subaru XV comes down to the specific design of its drivetrain. The Subaru XV utilises a symmetrical all-wheel-drive layout with a front-mounted boxer engine and a relatively straightforward driveline that connects directly to the front and rear differentials. This setup uses a solid, continuous propeller shaft without an intermediate support bearing, meaning there is no centre-bearing installed to support the shaft at a midpoint.

Centre-bearings typically appear in vehicles that have long propeller shafts that are split into two sections by a support bearing, known as multi-piece driveshafts. This is common in vehicles with long wheelbases or rear-wheel-drive and four-wheel-drive layouts where the driveshaft length requires additional support to reduce vibrations and stress. The 2018 Subaru XV's drivetrain, however, is compact enough and designed with a single-piece propeller shaft connecting the transfer case to the rear differential, so the centre-bearing is not necessary.

Choosing a drivetrain design without a centre-bearing helps keep the drivetrain lighter and simpler to maintain. It also means fewer components that could potentially wear out or require attention during servicing. This design choice fits well with the Subaru XV's aim for solid reliability, ease of maintenance, and cost-effectiveness.

For those curious about centre-bearings in general, here's what they do and when maintenance is needed, which is useful if you encounter other vehicles that include this part.

A centre-bearing, also known as a carrier bearing, is intended to support the middle section of a two-piece propeller shaft. This bearing holds the shaft in place, preventing it from wobbling or vibrating excessively while the vehicle is moving. Since the driveshaft is spinning at high speeds, any imbalance or lack of support can lead to vibrations, noise, or even damage to the drivetrain components over time.

Typically made with a bearing housed within a rubber mount, the centre-bearing allows some flexibility while also dampening shocks and vibrations. The rubber mount helps absorb movement, ensuring that the shaft stays aligned correctly while the vehicle is driving over uneven terrain or during acceleration and braking.

Replacing or maintaining a centre-bearing is important for vehicles that have them because a worn or failing centre-bearing can cause noticeable symptoms such as:

• Clunking or knocking noises from underneath the vehicle
• Persistent vibrations that increase with vehicle speed
• Uneven or excessive wear on the driveshaft or related components
• Difficulty with smooth power delivery to the wheels

When servicing a vehicle with a centre-bearing, it is wise to inspect the bearing for any signs of wear or damage during routine drivetrain checks. A qualified mechanic will check for looseness in the bearing, cracks or deterioration in the rubber mount, and excessive play in the propeller shaft assembly.

If the centre-bearing needs to be replaced, it is usually a straightforward job but one that requires proper lifting equipment and an experienced technician. The driveshaft must be removed or partially supported to separate the bearing and fit a new one, ensuring the alignment is correct on reinstallation to avoid future vibrations.

Although the 2018 Subaru XV does not use a centre-bearing, maintaining the drivetrain as a whole is still crucial. Regular servicing schedules should include checks on the driveshaft, differentials, and transfer case fluid to keep the drivetrain operating smoothly. Subaru's design typically favours sealed and maintenance-free components, but keeping an eye (and ear) out for unusual noises or vibrations is always recommended.

For Subaru XV owners, understanding that their vehicle's drivetrain does not require a centre-bearing can save time and confusion during servicing. It also highlights Subaru's focus on engineering simplicity and reliability within the system, contributing to the XV's strong reputation as an everyday SUV that is ready for both city use and light off-road adventures without the worry of complicated centre-bearing issues.