Parts for your 2017 Subaru Impreza-Centre bearing

2017 Subaru Impreza centre-bearing

Based on Subaru’s 2017MY Impreza workshop manual (Propeller Shaft section), the genuine Subaru EPC/parts catalogue for GT/GK chassis, and mainstream service data (e.g., Autodata/ALLDATA), the 2017 Subaru Impreza with Symmetrical AWD uses a two-piece propeller shaft with a centre support bearing. On this model the centre-bearing is part of the prop shaft assembly and, per factory guidance, is not normally serviced separately.

The centre-bearing’s job is to support the two-piece prop shaft midway down the car, keeping everything running true as torque heads to the rear diff. It damps vibration, controls shaft whip at highway speeds, and helps the driveline cope with body flex and suspension movement. When it’s healthy, the car feels smooth on take-off and steady at 60–110 km/h with no odd droning through the floor.

For owners in Australia and New Zealand, there’s no routine lubrication or scheduled replacement of the centre-bearing—it’s a sealed unit. Good servicing means regular inspection: look for a torn or perished rubber support, a sagging mount, shiny witness marks from contact, or any flung grease around the prop shaft joints. Road-test clues include a rumble or droning that rises with road speed, a thump on launch, or a shake under load between about 40–80 km/h.

If the bearing has gone noisy or the rubber has split, factory practice is to replace the complete propeller shaft assembly. That keeps balance spot-on and avoids chasing vibrations. Some driveline specialists may press in an aftermarket bearing, but it’s not the Subaru-approved repair and results can vary if balance isn’t checked. If the prop shaft comes out, mark flange orientations, use new self-locking fasteners where specified, loosely fit the centre-bearing bracket first, align the shaft neutrally, then torque all fixings to workshop-manual specs. It’s smart to recheck for vibration after tyres and wheels are rotated or suspension is lifted/altered, as driveline angles can change.

A tidy test is to inspect the centre support rubber while gently prying the shaft—excess movement or metal-on-metal contact is a red flag. When in doubt, follow the Subaru manual and have a driveline shop confirm run-out and balance.

• Common symptoms: mid-car rumble, whirring on overrun, thud on take-off, vibration at speed.
• Best practice: replace the full prop shaft assembly if the centre-bearing fails.
• Tip: keep engine and transmission mounts in good nick—excess movement can shorten centre-bearing life.

FAQs

Does a 2017 Subaru Impreza have a centre-bearing?
Yes. The 2017 Impreza sold in Australia and New Zealand runs Subaru’s Symmetrical AWD with a two-piece propeller shaft and a centre support bearing. It’s a standard component of the driveline on local models.

Can the centre-bearing be replaced on its own?
Factory guidance treats the centre-bearing as part of the propeller shaft assembly. The approved repair is to replace the full assembly. Some driveline specialists may fit an aftermarket bearing, but correct balancing is critical and results can vary versus a genuine complete unit.

What are the tell-tale signs the centre-bearing is on the way out?
Listen for a mid-car drone that follows road speed, a shudder or thump on take-off, or a vibration under load at suburban-to-highway speeds. Underneath, a cracked or sagging rubber support around the bearing is another giveaway.