Parts for your 2013 Subaru Legacy-Centre bearing

2013 Subaru Legacy centre-bearing: what it is, why it’s there, and how to look after it

The 2013 Subaru Legacy (BM/BR) uses Subaru’s full-time AWD driveline with a two-piece propeller shaft. Per the Subaru Factory Service Manual for 2013 Legacy/Outback (Propeller Shaft section) and the Subaru genuine parts catalogue for BM/BR models, that shaft is supported mid-length by a body-mounted centre-bearing (also called a centre support or carrier bearing). On this model the centre-bearing is integral to the prop shaft assembly and, in OEM terms, isn’t serviced separately.

That centre-bearing’s job is to hold the prop shaft steady, control runout, and keep vibrations in check while the AWD system sends drive to the rear diff. The rubber-isolated mount helps soak up noise and harshness, and the bearing’s position lets the shaft deal with changes in angle as the suspension works. When it’s healthy, the Legacy feels smooth at highway speeds and planted off the line.

Maintenance is light because the bearing is sealed. During regular servicing, a quick underbody check goes a long way:

• Look for perished or torn rubber in the carrier mount and any droop at the support.
• Spin and wiggle the shaft near the centre support, roughness, clunks, or visible play aren’t normal.
• Note road-test clues: a low-frequency drone or hum that rises with speed, a shudder between roughly 40–80 km/h, or a thump on take-off can point to a tired centre-bearing (also consider tyres, wheels, rear diff bushes and engine/trans mounts).

If the centre-bearing has failed, Subaru’s service literature specifies replacing the complete propeller shaft assembly. That ensures correct pre-balance and longevity. Some driveline specialists can press in a replacement bearing and rebalance the shaft, but it needs proper tooling and dynamic balancing—cut corners here and the vibration often gets worse. When fitting a new assembly, align the flanges as marked, use new self-locking hardware where specified, and torque to spec. After installation, a short road test and recheck of the mount fasteners is good practice.

Because the centre-bearing bolts to the body, anything that misaligns the driveline—collapsed gearbox or diff mounts, accident damage, or lifted ride heights—can shorten its life. Sort those root causes and the new prop shaft will stay happy for the long haul.

Does a 2013 Subaru Legacy have a centre-bearing?

Yes. The 2013 Legacy/Outback BM/BR AWD uses a two-piece propeller shaft with a body-mounted centre-bearing. This is documented in the Subaru Factory Service Manual (Propeller Shaft section) and shown as an integral part of the prop shaft assembly in the Subaru parts catalogue.

Can the centre-bearing be replaced on its own?

From the factory, Subaru supplies the propeller shaft as a complete unit and treats the centre-bearing as non-serviceable. Some driveline rebuilders can replace just the bearing and rebalance the shaft, but it requires specialist equipment and careful work to avoid vibration.

What are the common symptoms of a failing centre-bearing?

Tell-tales include a droning or humming that scales with road speed, a shudder on take-off or between about 40–80 km/h, and visible sag or cracking in the carrier rubber. Similar symptoms can also come from tyres, rear diff bushes, or CV joints, so a proper inspection is worthwhile.