Product Overview

The wheel hub bearing assembly, OEM number A2203300725, is the front wheel hub and bearing unit fitted to the Mercedes-Benz S-Class W220 and CL-Class C215, covering S350, S430, S500, S55, S600, CL500, CL55, and CL600 variants without 4MATIC. It's a complete hub assembly rather than a bearing-only kit, so it comes ready to bolt on without separate press-fitting, which matters for anyone stocking parts for busy workshops.

Worn units typically show up as a humming or grinding noise from the front wheel that changes with vehicle speed, steering wheel vibration, or looseness felt when rocking the wheel by hand. GSK Auto manufactures this hub assembly to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

2203300725, A220 330 07 25, 220 330 07 25

(Confirm against your VIN or chassis code before ordering - this part is specifically for non-4MATIC models, so it's worth verifying drivetrain configuration before ordering at volume.)

What Is a Wheel Hub Bearing Assembly?

Function: The wheel hub bearing assembly supports the wheel, allows it to rotate freely with minimal friction, and carries the vehicle's weight at that corner while also serving as the mounting point for the brake disc and wheel.

Working Principle: Sealed bearings inside the hub allow smooth rotation under load while resisting both radial and axial forces from cornering, braking, and road impacts, keeping the wheel running true.

Importance: A worn hub bearing affects both ride comfort and safety, since play or roughness in the bearing can translate into unpredictable handling and, if left unaddressed, complete bearing failure.

Common Failures & Signs: Humming, growling, or grinding noise from the wheel that changes with speed. Steering wheel vibration, particularly at highway speeds. Looseness or play felt when the wheel is rocked by hand. Uneven tire wear linked to bearing play affecting wheel alignment.

Key Features

OEM-standard fitment - matches factory bearing preload and hub dimensions for the A2203300725 application.

Precision manufacturing - bearing components machined to tight tolerance for smooth, quiet rotation.

Long service life - built to handle sustained daily-driving load.

Excellent fitment - direct bolt-in replacement, no modification required.

Corrosion resistance - housing finish resists moisture and road-salt exposure.

Easy installation - complete assembly, no separate press-fitting required.

Reliable performance - consistent rotation and load-bearing capacity matching factory calibration.

Benefits

Importers - one part number covers multiple S-Class and CL-Class variants, simplifying inventory.

Wholesalers - steady demand from a well-established luxury sedan and coupe platform.

Repair Shops - complete assembly reduces installation time compared to bearing-only kits.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored quiet, smooth wheel rotation and handling.

Packaging & Shipping

Standard export packaging, sized for a hub assembly. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Frequently Asked Questions

• What does this wheel hub bearing assembly do?

It supports the wheel, allows smooth rotation, and serves as the mounting point for the brake disc and wheel.

• Which vehicles use OEM A2203300725?

Mercedes-Benz S-Class W220 and CL-Class C215, non-4MATIC variants including S350, S430, S500, S55, S600, CL500, CL55, and CL600 - confirm exact chassis code and drivetrain before ordering.

• Can GSK Auto supply OEM-standard parts?

Yes, this hub assembly is manufactured to match OEM specification for fitment and performance.

• What's the MOQ for wholesale orders?

MOQ varies by order type - contact us directly for current wholesale tiers.

• Do you export worldwide?

Yes, we ship to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

• Can you customize packaging?

Yes, OEM-style and private label printing are available.

• How do I know if my wheel hub bearing needs replacing?

Common signs include humming or grinding noise from the wheel, steering wheel vibration, and play when the wheel is rocked by hand.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This hub assembly is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing wheel hub bearing assemblies for the Mercedes S-Class W220 or CL-Class C215? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.