Parts for your 2020 Subaru Impreza-Centre bearing

2020 Subaru Impreza centre-bearing: what it is, why it matters, and how to look after it

Yes — a centre-bearing is used on the 2020 Subaru Impreza (GK/GT). Technical sources confirm it. The Subaru Service Manual for Impreza GK/GT (2017–2021) lists removal and installation of the propeller shaft centre bearing bracket in the “Propeller Shaft” procedure. Subaru’s parts catalog (FAST) for 2020MY Impreza shows the propeller shaft as a two-piece assembly with an integrated centre support bearing. Subaru’s New Car Features documentation for the 2017MY Global Platform also describes a two-piece prop shaft with a centre support as part of Symmetrical AWD.

• Subaru Service Manual (Impreza GK/GT 2017–2021): Propeller Shaft – centre bearing bracket removal/installation
• Subaru FAST parts catalog (2020MY Impreza): Propeller Shaft ASSY with integrated centre support bearing
• Subaru New Car Features (Global Platform): Symmetrical AWD with two-piece propeller shaft and centre support

On the 2020 Impreza, the centre-bearing (also called a carrier or centre support bearing) sits mid-way along the two-piece propeller shaft, supporting it and keeping the driveline running true from the gearbox to the rear differential. It cushions vibration through a rubber isolator and maintains correct alignment under load, acceleration, and over rough roads. When it’s healthy, you don’t notice it, when it starts to fail, it can cause a droning or humming at certain speeds, a rhythmic vibration through the floor, or a clunk on take-off as the rubber support deteriorates.

Servicing is mostly inspection-based because the bearing is sealed and the support is rubber-mounted. During routine services or any driveline work, it’s smart to check the centre-bearing for free play, roughness when the shaft is rotated by hand, cracked or separated rubber, and signs of misalignment or contact with heat shields. If any of these show up — or if there are speed-related vibrations that aren’t from tyres or wheel balance — a closer look is warranted.

Replacement on this model typically involves removing the propeller shaft as an assembly. Subaru generally supplies the shaft complete, meaning the centre-bearing isn’t listed as a separate genuine service part on many variants. Aftermarket centre-bearing options exist, but fitting them requires pressing off/on components and carefully maintaining shaft phasing and balance. If going the aftermarket route, use quality components and match the factory alignment marks. Refit the centre-bearing bracket square to the body, tighten to factory torque, and ensure the prop shaft flanges are aligned as per the service manual to avoid introducing a new vibration.

Bottom line: keep an ear out for new noises and a feel for fresh vibrations, have the centre-bearing inspected during underbody checks, and if replacement is needed, follow factory procedures so the Impreza’s AWD remains smooth and quiet across Aussie and Kiwi roads.

Popular questions

Does a 2020 Subaru Impreza have a centre-bearing?
Yes. The AWD layout uses a two-piece propeller shaft supported by a centre-bearing mounted to the body. It helps control vibration and keeps the shaft aligned between the transmission and rear diff.

What are the symptoms of a worn centre-bearing on a 2020 Impreza?
Common signs include a humming or droning that changes with road speed, a shudder or vibration through the seat/floor, and a clunk on take-off as the rubber support perishes. Always rule out tyre/wheel issues first, then check the driveline.

Can the centre-bearing be replaced on its own?
Subaru typically supplies the prop shaft as a complete assembly, so the official repair is to replace the assembly. Some aftermarket centre-bearings are available, but fitting them needs pressing tools, correct phasing, and careful alignment to avoid new vibrations.