Parts for your 2017 Subaru Impreza-Centre bearing

Centre Bearing on the 2017 Subaru Impreza: Is It Used and What You Should Know

When it comes to the 2017 Subaru Impreza, it is important to understand how the drivetrain is constructed to know whether a centre bearing is part of the setup. After examining technical resources and Subaru's own design for this model, it's clear that the 2017 Subaru Impreza does not use a centre bearing in its drivetrain. This is mainly due to the Impreza's all-wheel-drive system and the layout of its driveshafts, which simply do not require one.

A centre bearing is typically used in vehicles with a two-piece driveshaft. Its purpose is to support the intermediate point of the driveshaft, preventing excessive vibrations and maintaining alignment between the transmission and the rear differential, especially in rear-wheel-drive or some four-wheel-drive vehicles. However, the 2017 Subaru Impreza utilises a longitudinally mounted flat-four "boxer" engine paired with a symmetrical all-wheel-drive system. This AWD setup distributes power via shorter half-shafts to each wheel rather than through a two-piece driveshaft requiring central support.

Because of this configuration, the Impreza's drivetrain does not experience the same length or torsional stresses on a single driveshaft that would normally necessitate a centre bearing. The design keeps the driveshafts relatively short and directly connected, thus eliminating the need for an additional bearing in the middle of the shaft. This simplifies the drivetrain, reduces potential points of failure, and keeps maintenance requirements straightforward.

So why exactly is a centre bearing not fitted to the 2017 Subaru Impreza? It all comes down to the vehicle's engineering priorities. Subaru's symmetrical all-wheel-drive system focuses on balanced weight distribution and efficient power delivery. The half-shaft arrangement is more compact and robust, solving vibration and alignment problems differently from vehicles that need a longer driveshaft. The lack of a centre bearing means there's one less component to worry about in terms of wear and maintenance, which suits the Impreza's practical and reliable character.

For these reasons, if someone is browsing parts or servicing information looking for a centre bearing on their 2017 Subaru Impreza, they won't find one listed. Instead, service and maintenance will focus on other components more relevant to the AWD system such as CV joints, differential fluid, and wheel bearings.

That said, for those curious about centre bearings in general or other models, it is interesting to know what role this part usually plays and how it should be looked after. A centre bearing acts like a support bracket for the driveshaft. It holds the driveshaft in place as it spins, ensuring it doesn't wobble excessively and cause vibrations inside the car. Without it, the driveshaft could flex, causing undue stress on other drivetrain components or premature wear.

In vehicles that use a centre bearing, maintenance usually involves checking for wear, as the bearing is subject to heat, dust, and mechanical stress. When the centre bearing starts to fail, drivers might hear rumbling noises or feel vibrations through the cabin. Replacing the centre bearing typically requires removing the driveshaft, which can be a little labour intensive but straightforward for a professional mechanic. It is best to inspect this part during regular servicing intervals or whenever unusual vibrations or noises occur.

Keeping the centre bearing lubricated (if applicable) and free from debris can extend its lifespan, but true maintenance primarily means replacing it as soon as wear signs appear. Left unaddressed, a failing centre bearing can lead to driveshaft damage or more expensive transmission problems.

While the 2017 Subaru Impreza does not incorporate this part, understanding the centre bearing's function can help Subaru owners appreciate how the Impreza's clever AWD system bypasses the need for one. It also highlights the vehicle's simplicity and reliability in drivetrain design - two qualities that add to the Impreza's appeal as a no-fuss, AWD compact car built to handle diverse driving conditions without fuss.