How Often to Replace Wheel Bearings When Replacing Brakes and Rotors

Replacing wheel bearings when you replace brakes and rotors is not always necessary. This decision largely depends on several factors, including the condition of the bearings, the type of vehicle, usage, manufacturer recommendations, and the design of the brake system. This article will explore these factors in detail and provide guidance on when replacing wheel bearings might be required.

Condition of the Bearings

If the wheel bearings are worn, noisy, or show signs of excessive play, they should be replaced regardless of the brake job. Inspecting them during the brake replacement process is crucial for ensuring optimal safety and performance. Ignoring these symptoms can lead to reduced tire life, vibrations, and even complete bearing failure.

Vehicle Type and Usage

For ordinary passenger cars, it is rare to need to replace wheel bearings when doing a brake job, as the two systems are not directly related. However, this may not apply to commercial vehicles such as semi-trailers, where brake and suspension components are often interrelated due to the nature of their use.

Heavier commercial vehicles that frequently stop and haul heavy loads are more susceptible to bearing issues. The harsh driving conditions and frequent stops can cause significant wear on the bearings over time, making regular inspection and potential replacement a necessity.

Manufacturer Recommendations

Manufacturer guidelines play a crucial role in determining when to replace wheel bearings. Some manufacturers recommend replacing wheel bearings at specific mileage intervals or during brake service, even if the current condition of the bearings is not concerning. Checking your vehicle's service manual for manufacturer-specific recommendations is always beneficial.

Brake System Design

The design of the brake system can influence whether wheel bearings need to be replaced during a brake job. On modern vehicles, brake rotors can often be removed without disturbing the wheel bearings, as they may be held in place with a few setscrews or have slotted hubs that allow them to slide off. In such cases, it is not necessary to replace the bearings when replacing brake rotors.

However, older rear-wheel-drive (RWD) vehicles often use tapered roller bearings, which require removal and repackaging to replace rotors. The cost of replacement bearings is relatively low compared to the labor required for cleaning and repackaging. For this reason, it often makes sense to replace the bearings during a rotor replacement, especially since the necessary parts are typically inexpensive.

General Guidance

While it is a good practice to inspect wheel bearings whenever you replace brakes and rotors, a strict replacement rule is not always applicable. It is essential to rely on the condition of the bearings rather than a predetermined schedule. If in doubt, consult your vehicle's service manual or a trusted mechanic for personalized advice.

In conclusion, the decision to replace wheel bearings when replacing brakes and rotors depends on a variety of factors. Regular inspections and understanding your vehicle's needs are key to ensuring optimal performance and safety. Always prioritize safety and consult relevant resources when in doubt.