BMW E90 Brake Caliper Bolt Size Specification & Installation Guide

Proper brake caliper bolts are critical for the safety and performance of your BMW E90, directly impacting braking reliability and component longevity. Understanding the correct bolt size ensures a secure installation and prevents costly damage.

The BMW E90 brake caliper typically uses a standard bolt size of 14mm with a hexagonal drive, commonly matching 14mm 1.5mm pitch bolts. Variations may exist based on brake model or year, so always verify against service manuals or OEM parts catalogs. Incorrect sizing risks misalignment, bolt stripping, or caliper failure, compromising braking efficiency.

When replacing or servicing E90 caliper bolts, use a torque wrench set to 25-35 Nm to avoid over-tightening. Clean mating surfaces thoroughly and apply anti-seize compound sparingly to prevent galling. Ensure proper bolt length—shorter bolts risk under-torque, while longer ones may protrude and interfere with suspension components. Always inspect bolts for cracks or wear during removal.

Using non-standard bolts—such as incorrect diameter, length, or thread pitch—can lead to brake caliper misalignment, vibration, or complete bolt failure under stress. This not only shortens component life but creates dangerous driving conditions. Always match original specifications to maintain optimal brake function and vehicle safety.

Selecting the correct brake caliper bolt size for your BMW E90 is vital for safe, reliable braking. Verify bolt dimensions with OEM data, use proper tools, and follow torque guidelines. For precision repairs, consult professional service centers or trusted engine part suppliers to ensure a perfect fit and long-lasting performance.

The brake caliper can leak fluid as it ages from the piston seal and also becomes corroded or restricted resulting in poor brake performance. If a brake caliper is not performing at 100%, you may notice a slight pull to one side when braking. You can service each brake caliper individually or both at the same time.

« Previous Thread Next Thread Brake caliper to carrier bolt. Bolts the caliper to the carrier - M12X1.5X43mm Brand: ES#: 3243872 Mfg#: 34106864424. Bimmerforums is the preferred online BMW Forum and community for BMW owners.

At Bimmerforums, you will find technical how. Front Brake Caliper Bolts - 10mm HEX/Allen or Torx T55. Shop OEM BMW Brake Caliper Bolts at BMW Parts Deal Up to 30% off Now! We offer factory BMW Brake Caliper Bolts for all BMW series and models.

This is the OEM BMW rear brake caliper mounting bolts (set of 2) out of a 2008 328i. They are in good condition with no stripped threads or heads. Will fit all model E90 E91 E92 E93 Coupe, Convertible, touring and Sedan.

Large range of Guide bolt, brake caliper for BMW 3 Saloon (E90) 316 i 1596 ccm 115 HP N45 B16 AC Brakes automotive parts and others. TOP auto parts brands from a single source for your auto Free shipping from £ 250. By using the E60 rotor with an eccentric bushing, you don't need to machine the caliper ear, you don't need to elongate the knuckle bolt hole for an accurate pad sweep, you don't need to down size the caliper bolt holes with a timesert, and you don't need to grind out the inside of the caliper well to make room for the rotors.

This part is listed by BMW as BMW part number 34203414763 (34-20-3-414-763) and is described as Genuine BMW Collar Screw For Rear Caliper Mounting. F22/F3X Fitment Note: Only for models with M Performance brake caliper.