Parts for your 2020 Lexus Is-Centre bearing

2020 Lexus IS centre-bearing: what it does and when to service it

Based on Lexus Technical Information System (TIS) workshop procedures for the 2017–2020 IS (GSE31/AVE30/ASE30) and OEM parts catalogues/EPC diagrams used by Lexus dealers and independent catalogues (e.g., Lexus EPC, Amayama/Partsouq-style diagrams), the 2020 Lexus IS uses a two‑piece propeller shaft with a centre support bearing (often listed as “Bearing, Center Support, Propeller Shaft”) across RWD and AWD variants, including IS300, IS350 and IS300h. So yes—this model is fitted with a centre‑bearing.

The centre‑bearing’s job is to support the middle of the two‑piece prop shaft, keeping everything aligned while the driveline twists under load and the body moves over bumps. It cushions vibration with a rubber isolator around the bearing, helps control NVH at highway speeds, and prevents the shaft from whipping at higher RPM. When it’s healthy, the car feels smooth under acceleration and steady at 80–110 km/h.

Tell‑tale signs it’s on the way out include a droning or humming that changes with road speed, a shudder on take‑off, and a thud or clunk when shifting from reverse to drive. Under the car, the rubber support can look cracked or perished, and the bearing may have noticeable play.

As part of routine servicing in Australia and New Zealand conditions, it’s sensible to visually check the prop shaft centre‑bearing every 40,000–60,000 km or if any driveline vibration pops up. A torch and pry bar are enough to spot torn rubber or looseness. Also inspect related bits that can mask or worsen symptoms—rear diff bushes, transmission mount, and the flex disc/giubo or damper (if fitted).

When replacement’s due, a few best‑practice tips apply:

• Mark the prop shaft flanges and yokes before removal to maintain phasing and balance.
• Fit the new bearing and support bracket without preloading the rubber, final‑tighten with the vehicle at normal ride height.
• Use new hardware where specified and torque to the Lexus TIS spec, consider threadlocker where noted.
• If vibration persists, have the shaft dynamically balanced and check universal joints for play.

Done properly, a fresh centre‑bearing restores that trademark Lexus smoothness and keeps the IS happy on long Kiwi and Aussie motorway runs.

• Does a 2020 Lexus IS actually have a centre‑bearing?
  Yes. Technical diagrams and the Lexus TIS service manual show a two‑piece prop shaft with a centre support bearing on 2020 IS models (IS300, IS350, IS300h), in both RWD and AWD configurations.
• How long does the centre‑bearing typically last?
  Many last well past 150,000 km, but harsh roads, heat, or fluid contamination can age the rubber sooner. Inspect every 40,000–60,000 km and whenever new vibrations appear.
• Can the centre‑bearing be replaced on its own?
  Yes, the centre support bearing can be serviced separately on the IS. Some dealers may supply it as part of a prop shaft assembly, but quality OEM‑equivalent bearings and supports are available individually through reputable parts suppliers.