Are all Subaru wheel bearings the same?

No. Subaru wheel bearings are not interchangeable across all models and years. They vary by model, generation, front versus rear location, and by whether the assembly is a sealed hub or a serviceable bearing.

Wheel bearings in Subaru vehicles come in different configurations and carry ABS integrations. This article examines the main bearing types, how compatibility changes across model families, how to identify the correct part, and what to expect during maintenance and replacement.

Different bearing configurations used by Subaru

Below is a breakdown of the main bearing configurations you’ll encounter on Subarus, including front hub assemblies versus rear bearings and the distinction between sealed hubs and serviceable bearings.

• Front hub bearing assemblies (sealed, usually one-piece units with integrated wheel studs and ABS sensor integration in many models)


• Rear wheel bearings (often sealed hub assemblies on modern Subarus; some older models used serviceable bearings with separate races)


• Serviceable bearings and race-and-seal designs (found in older Subarus or certain market variants)


• Performance or specialty variants (models like WRX/STI may use different hub designs or heavier-duty assemblies in some generations)

These distinctions affect how bearing replacements are performed, the cost, and labor time. Sealed hub assemblies are typically easier to replace as a unit, while serviceable bearings require more disassembly and seals.

Compatibility and model-year differences

Before replacing a wheel bearing, it’s essential to verify compatibility with your exact model and year, since hub diameter, inner/outer races, ABS tone rings, and bolt patterns can vary across generations.

Impreza and WRX/BRZ family

The Impreza and WRX families often share front hub assemblies across many years, but rear bearings can differ between generations. Performance variants may have slightly different installation requirements or torque specifications.

• Front bearings: commonly sealed hub units in modern years; earlier models may use serviceable designs


• Rear bearings: typically sealed hubs on current generations; variations exist by year


• ABS sensors: integrated into the hub in many recent years; older setups may have separate sensor configurations

To avoid mismatches, always verify the exact part number using your VIN or the dealer Parts Catalog.

Forester, Outback, Legacy family

These models often use different hub designs and bearing specifications than the smaller Impreza line. Generational changes can affect bearing size, stud pattern, and sensor interfaces.

• Front vs rear: bearing assemblies differ between positions and generations


• Market and generation differences: some regions used alternative hub designs for the same model year


• ABS/tone ring variations: sensor geometry and installation may vary by generation

Always confirm compatibility with a VIN-based parts lookup to ensure you receive the correct hub or bearing assembly for your specific vehicle.

How to identify the correct wheel bearing for your Subaru

Use your vehicle identification number (VIN), the exact model and year, and consult Subaru’s official catalog or a trusted retailer to confirm part numbers before ordering.

1. Gather your VIN, model, year, trim, and drivetrain information.


2. Determine whether you need a front or rear bearing, and whether the unit is sealed or serviceable on your vehicle.


3. Check the parts catalog for the exact hub/bearing assembly that matches your VIN and generation.


4. Inspect current components for ABS sensor integration and tone ring design to ensure compatibility.


5. Order the correct bearing kit (some kits include seals, mounting hardware, and sensors) and review installation torque specs.

Correct identification helps prevent fitment issues, safety concerns, and warranty problems.

Maintenance and replacement considerations

Most modern Subarus use sealed hub assemblies that are replaced as a unit rather than serviced in place. If you notice symptoms such as unusual noises that vary with speed, looseness or play in the wheel, or ABS warnings, have the bearing inspected promptly by a qualified technician. Because hub designs and sensor interfaces vary by generation, improper installation or incorrect part selection can affect braking performance and ABS reliability.

Maintenance strategy should include verifying part numbers against the VIN, ensuring proper mounting hardware, and following manufacturer torque specifications during installation. Using the correct OEM or OEM-validated aftermarket part helps preserve warranty and performance.

Summary

Subaru wheel bearings are not the same across the entire lineup. Differences exist between front and rear positions, between sealed hub assemblies and serviceable bearings, and across model generations (Impreza/WRX, Forester, Outback, Legacy, etc.). Always confirm the exact part number using your VIN and generation, ideally via the official Subaru Parts Catalog or a trusted retailer, to ensure a proper fit, safety, and warranty coverage.

Are all wheel bearings the same?

No, not all wheel bearings are the same; they vary significantly by type, generation, vehicle application, and whether they are a standalone bearing or an integrated hub assembly. Different designs like ball bearings and tapered roller bearings are used based on load requirements, while modern vehicles often use pre-sealed, integrated "hub bearings" that replace a more service-oriented, older "Generation 0" design.
 
This video explains the difference between older wheel bearings and modern integrated hub assemblies: 48sCars SimplifiedYouTube · Mar 25, 2023
Types of wheel bearings

• Ball Bearings: Common in light-duty passenger cars, these are made of spherical balls between an inner and outer race. 
• Tapered Roller Bearings: Used in heavy-duty applications like commercial trucks, they are strong and can handle high radial forces. 
• Straight Roller Bearings: Another type of roller bearing, used in various applications. 

Generations of hub bearings

• Generation 0: Found in older vehicles, these are separate tapered roller bearings that require regular maintenance like greasing and tightening. 
• Generation 2: Pre-lubricated, non-driven wheel bearings that are compact and maintenance-free. 
• Generation 3: The most common type in modern vehicles, these are sealed, integrated units that include the hub, bearing, and sometimes wheel speed sensors. They are designed to be replaced as a single unit. 

This video explains the different generations of wheel bearings: 20sMineral Circles BearingsYouTube · Sep 15, 2023
Other factors

• Side-specific: Depending on the vehicle, left and right-side bearings may be identical or specifically designed for one side. 
• Integrated vs. separate: Many modern vehicles use integrated hub bearing assemblies, while older vehicles use separate, serviceable bearings that can be taken apart for re-lubrication. 

This video explains the difference between older wheel bearings and modern integrated hub assemblies: 47sPhillips VisionYouTube · Sep 24, 2022

What company makes Subaru wheel bearings?

NTN and Koyo are the Japanese OE suppliers. Moog also a decent option.

Can I spray WD-40 on a wheel bearing?

No, you should not use standard WD-40 on wheel bearings as a lubricant because it will strip the protective grease, causing premature wear and damage. WD-40 is a water displacer and degreaser, not a long-lasting lubricant. For lubrication, use a proper wheel bearing grease, or a WD-40 Specialist product like white lithium grease or gel lube if you need a spray lubricant. 
Why standard WD-40 is bad for wheel bearings

• It's a degreaser: Its primary function is to cut through and dissolve grease, which is what protects wheel bearings. 
• Low viscosity: It's too thin to stay in the bearing and provides no lasting lubrication, leading to metal-on-metal contact and wear. 
• Attracts dirt: It can leave a residue that attracts dirt and grime, further increasing wear. 

What to use instead

• Wheel bearing grease: This is the best choice for long-term lubrication and protection. You can purchase it at any auto parts or tractor supply store. 
• WD-40 Specialist products: If you prefer a spray, use a product specifically designed for lubrication from the WD-40 line: 
  • Specialist White Lithium Grease: This is a heavier-duty, water-resistant lubricant for high-pressure applications. 
  • Specialist Gel Lube: This is a non-drip gel that resists water, moisture, and rust for extended periods. 

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How often should wheel bearings be replaced on a Subaru?

100,000 miles
Typically, there is no maintenance required for your Subaru wheel bearings, but a replacement is usually needed after 100,000 miles of driving. Subaru features two different types of wheel bearings, and your model might have one or the other, depending on how old it is.