Centric 121.34116 Disc Brake Rotor - Front Left

Centric C-TEK Front Left Brake Rotor

The Centric C-TEK Standard Disc Brake Rotor, part number 121.34116, is built for BMW front-left brake service where consistent stopping performance and dependable service life matter. It is a vented, smooth-surface rotor sized for large BMW applications, including 750i and 550i GT xDrive fitments.

Centric’s C-TEK Standard Disc Brake Rotors line focuses on practical OE-style replacement value for everyday driving and routine brake maintenance. This rotor follows the application-specific dimensions needed for proper fitment on select BMW 7 Series and Gran Turismo models.

Key Features

• Part number 121.34116 for direct reference and ordering
• Vented rotor design for front brake applications
• Smooth surface type for standard brake service
• Outside diameter: 14.724 in. / 374.0 mm
• Nominal thickness: 1.417 in. / 36.0 mm
• Discard thickness: 1.339 in. / 34.0 mm
• Overall height: 2.610 in. / 66.3 mm
• 5-lug pattern with 120.0 mm bolt circle diameter
• Curved vane style for airflow through the rotor
• Floating disc mounting with one miscellaneous hole

Detailed Description

This Centric brake rotor is engineered for front-left use on select BMW models, including the 2010-2017 BMW 550i GT xDrive, 2010-2015 BMW 550i GT, 2009-2015 BMW 750i, 2010-2015 BMW 750i xDrive, 2010-2015 BMW 750Li, and 2010-2015 BMW 750Li xDrive. If you are searching for a BMW 750i front left brake rotor or a BMW 550i GT xDrive front left disc brake rotor, this part number 121.34116 matches the listed applications.

The rotor’s vented construction and curved vane layout support airflow through the braking surface, while the smooth finish provides a standard replacement profile for brake service. Critical dimensions such as center hole diameter, bolt circle, thickness, and overall height are specified to align with the intended BMW fitments. This part cross-references 45544 and 850441 for the same application.

What It Helps Address

• Brake pulsation caused by worn or out-of-spec rotors
• Reduced braking consistency from excessive rotor wear
• Noise related to rotor surface condition
• Service replacement needs on BMW front-left brake systems
• Fitment issues when replacing a rotor with incorrect dimensions

Installation Notes and Tips

Verify the vehicle’s year, model, and front-left position before installation. Confirm rotor dimensions, lug pattern, and center bore against the removed part to ensure proper match. Inspect pads, caliper hardware, and hub condition during brake service so the new rotor seats correctly and wears evenly. For BMW 750i and BMW 550i GT applications, follow the vehicle service procedure for brake cleaning, torque specification, and bedding-in after installation.

Quality Assurance

Centric’s C-TEK Standard Disc Brake Rotors are positioned as OE-style replacement parts for a wide range of applications, with an emphasis on service life and value. Part number 121.34116 is built to the listed specifications for confirmed BMW fitments.