Parts for your 2012 Subaru Impreza-Centre bearing

2012 Subaru Impreza centre-bearing — what it does and when to replace

Technical confirmation: Referencing the Subaru Service Manual for the 2012 Impreza (GP/GJ, Propeller Shaft section) and the Subaru FAST parts catalogue, all all-wheel-drive (AWD) 2012 Impreza models use a two-piece propeller shaft with a body-mounted centre support bearing. That means a centre-bearing is fitted and relevant on Australian and New Zealand vehicles. Front-wheel-drive variants (where sold in other markets) don’t have a prop shaft, so no centre-bearing is used on those.

On the AWD 2012 Subaru Impreza, the centre-bearing’s job is to support the two-piece prop shaft, keep it aligned under load, and dampen vibration through a rubber isolator. It helps the driveline stay smooth during take-off, cruising, and when the suspension moves over bumps. When the bearing or its rubber mount wears, the result is extra play and misalignment, which shows up as vibration, droning, or a thump on acceleration.

Because it’s a sealed component, the centre-bearing isn’t a lubricate-and-forget item. It benefits from regular inspection during scheduled servicing—ideally whenever the vehicle is on a hoist. Technicians should check the rubber support for cracking or separation, spin the shaft to feel for roughness, and look for excessive movement at the bracket. It’s smart to assess the prop shaft joints at the same time.

Replacement is straightforward workshop work, but it’s not a DIY favourite. Subaru typically supplies the centre-bearing as part of the complete propeller shaft assembly, and many workshops choose to replace the whole shaft to maintain balance and longevity. Aftermarket centre-bearing kits do exist, but pressing the bearing on/off and reassembling without upsetting balance requires proper tools and care. Marking flange positions before removal, using new self-locking fasteners, and tightening the centre bracket evenly helps avoid shudder. A road test for NVH after fitment is a must.

Common signs the centre-bearing needs attention include:

• A droning or humming that changes with road speed, not engine revs
• A shudder on take-off or under load
• A thump or knock as drive is engaged
• Visible tears or sagging in the rubber support

There’s no set kilometre interval for replacement—condition and usage matter. High-mileage commuting, towing, rough roads, and underbody impacts can all shorten its life. Catching wear early keeps the Impreza’s AWD system quiet, smooth, and ready for another long stint on Kiwi and Aussie roads.

Popular questions

Does every 2012 Subaru Impreza have a centre-bearing?
AWD models do, they run a two-piece propeller shaft supported by a centre-bearing. Where a 2012 Impreza was sold as front-wheel drive, there’s no prop shaft and no centre-bearing. Australian and New Zealand cars are AWD, so the centre-bearing applies.

What are the classic symptoms of a failing centre-bearing on this model?
The tell-tales are a speed-related hum or drone, a shudder on take-off, and a dull thump as load comes on and off. Under the car, split or sagging rubber at the bearing bracket is another giveaway.

Can the centre-bearing be replaced on its own, or is a complete shaft needed?
Subaru generally supplies the bearing as part of the complete propeller shaft assembly. Many workshops fit the full assembly for best balance and reliability. Some aftermarket bearings are available on their own, but pressing and rebalancing require the right tools and know-how.