Parts for your 2017 Mazda Bt-50-Centre bearing

2017 Mazda BT-50 Centre Bearing

From technical sources such as the Mazda BT-50 UP/UR workshop manual and OEM/aftermarket parts catalogues for 2015–2020 models, a centre support bearing is fitted on BT-50 variants that use a two-piece propeller shaft. That covers most Australian and New Zealand–delivered dual-cab and many 4x4 models. Some short-wheelbase or specific 4x2 configurations can run a single-piece tailshaft and won’t have a centre-bearing. So for most 2017 BT-50 utes on local roads, the centre-bearing is relevant and serviceable.

A centre-bearing (often called a carrier bearing) sits mid-way along the two-piece tailshaft, supporting the shaft and keeping driveline angles in check. On a workhorse like a 2017 BT-50—often loaded up, towing, or seeing rough tracks—it helps control vibration, reduce stress on universal joints, and keep things smooth from gearbox to diff. It’s a simple rubber-mounted bearing in a bracket, but it cops a hard life: heat, road grime, water crossings, and the twisting loads of a torquey diesel.

As part of routine servicing, it’s smart to cast an eye (and ear) over the centre-bearing. Look for perished or cracked rubber, sagging of the carrier, flaking rust on the bracket, or play in the bearing. On-road symptoms that point to trouble include a humming or droning that rises with road speed, a shudder on take-off, or a pulsing vibration under load. If the rubber mount has torn or the bearing is rough, replacement is the go—there’s no real way to “re-grease” or adjust it on the vehicle.

Replacement is straightforward for a workshop with a hoist. The tailshaft is marked and split, the old carrier is pressed off, and the new bearing and mount are pressed on before refitting and aligning the shaft. It’s important the shaft halves go back together in their original orientation to maintain balance, and that the centre-bearing bracket is installed without pre-loading the rubber. If the ute has been lifted or had driveline angles altered, a check of tailshaft alignment and diff pinion angle is worth doing at the same time.

Good habits to make the centre-bearing last longer:

• Keep tailshaft and underbody clean—wash off mud and salt after beach or farm work.
• Fix any uni joint or transmission mount issues early—excess movement kills the carrier.
• Avoid shock loading the driveline—ease into throttle when towing or launching on steep tracks.

With the right part and a careful install, a fresh centre-bearing will bring a BT-50 back to quiet, smooth cruising and protect the rest of the driveline from costly wear.

Popular questions about the 2017 Mazda BT-50 centre-bearing

Does every 2017 BT-50 have a centre-bearing?
Most Aussie and Kiwi 2017 BT-50s—especially dual-cab and many 4x4 variants—run a two-piece tailshaft with a centre-bearing. Some short-wheelbase or specific 4x2 models may have a single-piece shaft and won’t use one. A quick look underneath will confirm it: two-piece shaft with a mid-ship bracket means it’s fitted.

What are the common signs the centre-bearing needs replacing?
Tell-tales include a low-speed take-off shudder, a droning or humming that tracks with road speed, and visible cracks or sag in the rubber mount. If left too long, it can accelerate uni joint wear and create harsher vibrations.

How often should the centre-bearing be checked?
There’s no fixed interval, but it’s smart to inspect at every service, especially if the ute tows, carries heavy loads, or has been lifted. After deep water crossings or beach runs, add an extra look once it’s cleaned and dried.