Parts for your 2017 Subaru Outback-Centre bearing

Technical sources indicate the 2017 Subaru Outback uses a two-piece propeller shaft with a centre support bearing. This is shown in the Subaru Legacy/Outback (2015–2019) Factory Service Manual under Drive Shaft System—Propeller Shaft (components list includes the centre bearing and bracket), and echoed by Subaru’s parts catalog, which supplies the propeller shaft assembly with an integral centre-bearing.

2017 Subaru Outback centre-bearing: what it does and how to look after it

On the 2017 Outback, the centre-bearing sits midway along the two-piece prop shaft, supporting the shaft so it tracks straight between the transmission and the rear diff. It keeps driveline angles happy, carries radial load, and the rubber isolator in the bracket helps knock down noise and vibration that would otherwise end up in the cabin.

Why Subaru uses one here comes down to packaging and refinement. The Outback’s wheelbase and full-time AWD layout make a single long shaft a bit of a handful at higher speeds. A centre-bearing lets Subaru split the shaft in two, manage critical speeds, and keep things smoother and quieter on rough roads and long trips.

There isn’t any scheduled lubrication for the centre-bearing—it’s sealed. But it deserves a look during regular servicing, especially once the kilometres rack up. A quick visual from underneath can catch problems early: cracked or perished rubber, sagging support, or signs of the bearing running rough.

• Typical symptoms of a tired centre-bearing: speed-related humming or whirring, shudder on take-off, vibration through the floor around 40–80 km/h, a thud when shifting from drive to reverse, or visible play in the support.
• Inspection tips: with the car safely on a hoist, check the rubber carrier for splits, make sure the bracket is secure, and rotate the shaft by hand to feel for notchiness. Also look for torn dust shields and any contact marks around the bracket.

If the bearing is noisy or the carrier has let go, replacement is the go. From the factory, Subaru treats the centre-bearing as part of the complete propeller shaft assembly rather than a separate service item. Many workshops will fit a new OE or quality remanufactured shaft. Some driveline specialists can press in an aftermarket centre-bearing and rebalance the shaft—handy if you’re chasing value—but it needs the right tooling and balance gear.

During the job, mark the flanges so the shaft goes back in the same orientation, use new self-locking fasteners where specified, and torque everything to the service manual. Once fitted, a road test to check for any lingering NVH and a quick re-check of mounts (trans and diff) keeps the Outback feeling tight and quiet.

Does a 2017 Subaru Outback actually have a centre-bearing?

Yes. The 2015–2019 Legacy/Outback factory service manual shows a two-piece propeller shaft with a centre bearing and bracket, and Subaru’s parts catalog supplies the shaft as an assembly with the bearing integrated. It’s absolutely relevant on this model.

Can the centre-bearing be replaced on its own, or does the whole shaft need changing?

Subaru supplies the propeller shaft as a complete unit, so the official route is to replace the assembly. Some driveline shops can replace just the centre-bearing with quality aftermarket parts and then rebalance the shaft. If going that way, choose a specialist who can balance it properly to avoid new vibrations.

Is it safe to drive with a failing centre-bearing?

Short trips might be possible, but it’s not ideal. A worn centre-bearing can cause vibration that stresses the U-joints, mounts, and seals. Left too long, it can accelerate wear elsewhere and make the eventual repair bigger than it needs to be. Best to book it in once the symptoms show up.