BMW E81 E87 E90 E91 E92 Caliper Brake Rear Left N/S TRW 40/10 6776377

BMW E90 E91 Rear Left Brake Caliper 40/10 is an original part from the brake calipers and brackets category, designed for the rear left axle in Series 3 E90/E91 models. This solution is for users who expect stable brake system performance and correct fitment with the factory BMW installation.

Specifications and technical data

• SKU: 6776377
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6776377
• Substitutable numbers: 6776377, 34216776377, 6768191, 34216768191
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Intended Use and Fitment for BMW E90/E91

The presented caliper is designed as a component for the rear left axle in the braking system of BMW 3 Series E90 and E91. Its placement on the vehicle is clearly defined, which simplifies selecting the correct component when replacing a single caliper or repairing the entire axle.

Thanks to its construction aligned with factory BMW specifications, the caliper works with the stock brake master cylinder, lines, and carrier, ensuring predictable braking characteristics and correct force distribution to the rear axle.

Technical Specifications of the Brake Caliper

The model designated as 40/10 belongs to a group of calipers with parameters tailored to the typical rear axle load in BMW E90/E91. Its design anticipates operation with brake discs of standard dimensions for these models, allowing for seamless integration with the existing system.

This solution ensures:

• stable brake pad guidance within the caliper carrier,
• even pad pressure against the disc during braking,
• proper cooperation with vehicle safety systems such as ABS and traction control (provided other system components are functional).

Component Condition and Installation Aspects

The brake caliper is offered as a used part, which allows for optimized repair costs while maintaining original BMW specifications. Before installation, standard servicing procedures are recommended: checking for leaks, smooth piston and guide operation, and replacing wear parts (seals, dust boots, mounting bolts) in accordance with good workshop practice.

During installation, pay attention to:

• proper bleeding of the brake system after installation,
• applying the correct torque to the mounting bolts,
• checking the condition of the brake discs and pads on both the left and right sides to maintain symmetrical operation.

Application in Service and Cost Optimization

Choosing an original BMW brake caliper for the rear left axle is beneficial for workshops and users who want to maintain factory braking performance without investing in new components. A used OEM part helps reduce costs while ensuring compatibility with other system components.

If you are planning comprehensive brake system service and want to better understand how to safely select used discs, calipers, and ABS components, check out our guide: Used Brake Systems: How to Safely Choose Discs, Calipers, and ABS?. This is a practical checklist useful for both mechanics and informed users.

Other BMW Brake Calipers and Brackets

If you are also looking for other BMW brake calipers and brackets for the 3 Series or other models of this brand, check out the available items in our assortment: BMW brake calipers and brackets. This will allow you to easily assemble a complete set of components necessary for efficient rear axle repair.