Parts for your 2012 Subaru Impreza-Centre bearing

Centre Bearing on the 2012 Subaru Impreza: Is It Used and What You Need to Know

The 2012 Subaru Impreza does not use a centre bearing in its drivetrain setup. This is largely due to the vehicle's design, particularly its all-wheel-drive system which utilises a different method for power transmission compared to some other vehicles that do require a centre bearing. Understanding why the Impreza doesn't have this part sheds light on how its driveline works and why certain components are included or excluded in Subaru's engineering.

A centre bearing is typically found on vehicles with a two-piece or multi-piece driveshaft. It supports the driveshaft where it is split into sections, reducing vibration and maintaining alignment during rotation. This can be critical for larger or longer vehicles where a single-piece driveshaft is impractical due to length or flexibility constraints. The centre bearing is mounted to the chassis and holds the driveshaft steady, preventing excessive movement that could otherwise cause wear or damage.

Now, the 2012 Subaru Impreza's drivetrain layout means it does not use the traditional long driveshaft found in many rear-wheel-drive or some all-wheel-drive vehicles. Instead, it has a comparatively compact layout with shorter driveshafts that connect the transmission or transfer case directly to the wheels. As such, the need to divide the driveshaft into segments supported by a centre bearing simply does not exist. The Impreza employs a symmetrical all-wheel-drive system with a relatively short driveshaft length and constant velocity joints that manage power delivery smoothly without needing a centre bearing.

So why does this design choice matter? For starters, not having a centre bearing means one less component to maintain or replace. This reduces the complexity of the drivetrain, potentially improving reliability and lowering maintenance costs over the life of the vehicle. Subaru's design also enhances handling and stability, which are hallmarks of the Impreza, by keeping the drivetrain balanced and compact.

In some other vehicles, especially trucks or SUVs with long wheelbases, the driveshaft might be split and require a centre bearing to maintain stability and reduce vibration. The centre bearing supports the driveshafts in the middle, preventing wobble or flex that can cause noises and premature wear. But the Impreza's AWD setup does not necessitate this, thanks to its drivetrain architecture.

For owners of a 2012 Subaru Impreza, this means there is no centre bearing to worry about when it comes to routine service or potential repairs. Maintenance will instead focus on other key drivetrain components like the transmission fluid, CV joints, differential oil, and hub assemblies. These parts play a bigger role in ensuring the all-wheel-drive system functions smoothly and reliably.

For those curious about the parts that do require attention, regular service intervals typically include inspecting and replacing transmission fluid to keep gears and clutches in good working order, checking CV joints and boots for damage or leaks, and monitoring differential oil levels for wear and contamination. These areas absorb the stresses of power transfer in the Impreza's AWD system, which replaces the function that axial drivetrain components like centre bearings might serve in other vehicles.

If your Subaru Impreza is making unusual noises or vibrations, the problem is more likely linked to worn CV joints, tyres, or suspension parts rather than a failed centre bearing. Troubleshooting these symptoms with a qualified mechanic will help pinpoint the exact cause. Since there is no centre bearing in the drivetrain, service providers will look elsewhere to diagnose powertrain issues.

All up, the absence of a centre bearing on the 2012 Subaru Impreza reflects Subaru's thoughtful design for this model and year. The AWD system is inherently different from setups that demand a centre bearing, streamlining the vehicle's driveshaft construction. Impreza owners can appreciate this as part of why the car offers a smooth, balanced ride while requiring fewer drivetrain repairs related to shaft alignment and support.