Parts for your 2018 Lexus Is-Centre bearing

Centre Bearing on the 2018 Lexus IS: Is It Used and What You Need to Know

When it comes to the driveline components of the 2018 Lexus IS, many car owners and enthusiasts often wonder whether a centre bearing is part of the equation. After digging into the technical specifications and service manuals for this model, it turns out that the 2018 Lexus IS does not use a centre-bearing as part of its drivetrain setup. This might come as a surprise to some, so it's worth explaining why this is the case and what it means for the car's maintenance and performance.

A centre bearing, also called a carrier bearing, is typically found on vehicles that have a two-piece drive shaft. This kind of drive shaft design is common in longer vehicles where the single shaft would be too long and prone to excessive vibration or flexing. The centre bearing supports the intermediate shaft, holding it firmly in place and reducing vibrations, which in turn helps with smoother power delivery and less wear on the drivetrain components.

However, the 2018 Lexus IS, especially in rear-wheel drive (RWD) form, features a single-piece drive shaft. This means the driveshaft runs straight from the transmission to the rear differential without needing intermediate support. Because the shaft length is manageable and the design inherently limits excessive vibration, a centre bearing is unnecessary. Not having this part actually benefits the car in terms of fewer components that can wear out or need service.

For the all-wheel drive (AWD) versions of the Lexus IS, the setup includes a transfer case and multiple shafts, but even then, the use of centre bearings is not part of the design. Instead, the power is split between drive shafts that are engineered to deal with the forces without requiring a centre bearing.

So, if there's no centre bearing on the 2018 Lexus IS, what should owners keep an eye on instead when it comes to maintaining the drivetrain? The focus should really be on the universal joints (U-joints), drive shaft balance, and ensuring that all mounting points and bushings are in good condition. These parts work together to ensure smooth power delivery to the rear wheels without vibration or noise.

Some reasons why the centre bearing is not used in the 2018 Lexus IS include:

• The single-piece driveshaft design for RWD models means no intermediate support is required.
• Manufacturers aim to simplify the drivetrain for reliability and reduce maintenance needs.
• The overall drivetrain layout and dimensions make a centre bearing unnecessary due to manageable shaft length and vibration control.

For those curious about the types of issues centre bearings can cause when fitted on other vehicles, common symptoms include vibration at certain speeds, noise from the driveline, and even potential misalignment leading to premature wear on other parts. But since the Lexus IS does not use this part, owners don't need to worry about these specific problems.

Instead, caring for your 2018 Lexus IS's driveline means regular inspections during servicing. Mechanics will generally check for play in the U-joints, look for any signs of balancing issues with the driveshaft, and confirm that all supporting bushings and mounts are secure. Keeping these in top shape helps extend the life of the drivetrain and keeps the car smooth on the road.

When servicing the driveshaft area, here are some maintenance tips relevant to the 2018 Lexus IS:

1. Have the U-joints inspected regularly (usually every 40,000 to 60,000 kilometres) as they can wear or fail, resulting in vibration or clunking noises.
2. Listen for any unusual vibrations or sounds coming from underneath the car - this can be an early sign of drive shaft or mount problems.
3. Make sure that driveshaft balancing and alignment are checked if any vibration issues are reported after repairs or modifications.
4. Ensure mounting bushings and hardware are tight and free of excessive wear to prevent shifting or knocking in the drivetrain.

By focusing on these key areas instead of a centre bearing, Lexus IS owners get the benefit of a simpler drivetrain layout that tends to be very durable and requires less frequent component replacement. That said, keeping up with regular maintenance and knowing what to look for helps avoid any costly repairs and ensures the car keeps delivering that smooth, quiet drive Lexus is known for.

If someone is upgrading or modifying their Lexus IS, particularly with aftermarket drivetrain parts or going for higher power outputs, it's always a smart idea to consult a qualified mechanic or specialist. They can advise if additional support components or different driveshaft solutions are recommended to handle increased stress or altered driveline geometry. But for a standard 2018 Lexus IS out on the road, there's no centre bearing involved, and that's just part of the neat and efficient design Lexus engineers put together.