Explore our featured wholesale automotive calipers engineered to exact specifications.
Founded in 1998 as a small workshop producing automotive components, our company has grown into a fully integrated manufacturing and trading enterprise specializing in high-quality braking systems. Over the past two decades, we have expanded our product range, enhanced our production capabilities, and established a strong global presence.
Today, we are a trusted supplier of brake calipers, repair kits, motors, caliper brackets, brake drum repair kits, and more, serving customers in multiple international markets. Our specialized engineering focus allows us to deliver high-precision OEM replacement parts like the 43018S84A53 Rear Right Brake Caliper, ensuring structural safety and optimal fluid dynamics for modern braking applications.
Comprehensive solutions designed for aftermarket excellence and long service lifetimes.
Electrical Parking Brake Caliper with actuators
For European, American, Japanese, and Korean cars
50+ reference numbers in portfolio
60+ reference numbers for global applications
For most Japanese and Korean passenger cars
Once the raw caliper body is formed, it undergoes precision machining on Computer Numerical Control (CNC) machines. This critical stage involves:
All finished products undergo rigorous high-pressure/low-pressure leakage testing, piston travel verification, and anti-corrosion validation prior to distribution.
Please check our catalogue processing instructions below:
From a localized workshop to a leading global OEM/ODM caliper supplier.
Our story began in 1998 with a focus on manufacturing precision brake components for the domestic aftermarket. By 2008, we took a significant step forward by establishing our own brake caliper factory, enabling us to provide high quality products to Chinese trading companies. A decade later, in 2018, we founded our international trading company, marking our official entry into the global market. This strategic move allowed us to directly engage with overseas customers, offering tailored solutions for diverse automotive needs.
Analyzing the engineering architecture, materials, and applications of OEM caliper 43018S84A53.
The 43018S84A53 part number corresponds to a high-precision rear passenger side brake caliper assembly, commonly integrated into passenger vehicle chassis systems. At Wenzhou BIT, we produce this part to meet or exceed original equipment manufacturer (OEM) tolerances. The metallurgy of our calipers relies on premium ductile cast iron (QT450-10 grade) or high-strength aluminum alloy formulations, depending on specific structural weight and thermal capacity requirements.
Our raw material undergoes induction furnace melting, followed by spectrometer analysis to verify the correct carbon, silicon, and manganese distribution. This chemical control prevents porosity and cracking under extreme hydraulic pressure. The cylinder bore for the piston is machined to tolerances within ±0.02 mm, featuring a micro-finish that reduces friction coefficients, prevents premature wear of EPDM rubber piston seals, and ensures absolute hydraulic sealing.
Machined from carbon steel with hard chrome plating, resisting corrosion from environmental moisture and brake fluid. Uses EPDM seals for high elasticity from -40°C to 150°C.
Electroplated with environment-friendly Trivalent Zinc or Geomet coatings, passing a minimum of 72 hours of neutral salt spray testing (ISO 9227) without white rust.
Slide pins are case-hardened and pre-lubricated with high-temperature synthetic silicone grease to ensure noise-free floating movement and uniform pad wear.
Brake calipers are subjected to distinct operating environments depending on global geography. By understanding these localized demands, Wenzhou BIT tailors its caliper designs:
How Wenzhou BIT leverages geographic and structural advantages to guarantee volume delivery.
Situated in the heart of Wenzhou's automotive parts manufacturing cluster, we have direct, immediate access to high-grade steel mills, rubber sealing specialists, and casting foundries. This eliminates long-distance transit delays for raw components.
Proximity to Ningbo and Shanghai ports permits efficient container loading and direct maritime shipping. We utilize digital inventory management to track components and match orders, minimizing dispatch lead times for bulk buyers.
By coupling automated CNC milling with internal mold-making, we achieve significant economies of scale. We pass these cost efficiencies directly to our wholesale partners, enabling competitive pricing structures globally.
As the automotive landscape shifts towards electrification, braking demands are evolving. Regenerative braking systems on Electric Vehicles (EVs) mean mechanical brakes are used less frequently but must engage reliably and instantly when needed. This trend increases the risk of caliper corrosion due to under-use.
Wenzhou BIT's R&D division is focused on the development of lightweight aluminum calipers to reduce unsprung mass, along with specialized low-drag caliper designs that retract the piston fully to minimize friction losses, contributing to extended EV battery range. We are also expanding our product range for Electronic Parking Brake (EPB) calipers, integrating high-torque actuators to replace mechanical cable systems in modern vehicles.
Ensuring standard-compliant products reach your local retail and distribution networks.
Wenzhou BIT manufactures all brake calipers in strict compliance with the IATF 16949 Quality Management System. This certification ensures every process step—from design and manufacturing to final packaging—is tracked and continuously improved.
Furthermore, our calipers are tested to meet the performance criteria outlined in SAE J1603 standards (covering brake caliper integrity, low-temperature fluid containment, and high-temperature displacement). For European distribution partners, our replacement calipers conform to structural equivalency standards, ensuring smooth customs clearances and legal compliance in countries requiring CE or E-mark equivalent documentation.
As we move forward, our mission remains clear: to deliver superior braking solutions while expanding our global footprint. By combining decades of expertise with a customer-centric approach, we aim to strengthen our position as a leading supplier in the automotive aftermarket.
Essential information for wholesale buyers, importers, and technical distribution partners.
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BIT Automobile
