Explore our high-demand OEM-equivalent braking systems engineered for international markets.
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 customer-centric framework ensures every production batch complies with the rigorous requirements of safety-critical aftermarket standards.
From modern electronic parking actuators to traditional hydraulic brake calipers.
Electrical Parking Brake Caliper integrated with high-torque actuators, offering precise parking control for mid-to-high-end passenger vehicles.
Engineered for European, American, Japanese, and Korean vehicle segments, featuring robust cast steel and alloy construction with anti-corrosion finishes.
Supporting over 50 reference numbers with critical tolerances maintained under 0.02mm for absolute alignment and reduction of brake pad drag.
With 60+ reference numbers in active manufacturing, these actuators supply high torque, low noise operation, and IP67 waterproof protection.
Comprehensive elastomer and accessory kits customized primarily for Japanese and Korean vehicle applications, utilizing high-grade EPDM seals.
Rapid tooling development for special commercial vehicles and classic automobile restoration projects, built exactly to custom engineering schematics.
From a localized component manufacturer to a vertically integrated global supplier.
Established as a specialized automotive machining workshop. Focused heavily on perfecting precision components for domestic OEM tiers, establishing core metallurgical expertise.
Inaugurated our dedicated, state-of-the-art brake caliper foundry. This pivotal expansion allowed us to support high-volume export trading companies across mainland China.
Launched our dedicated international trading and support division, streamlining the supply chain by delivering high-grade calipers directly to global distributors and wholesalers.
A comprehensive analysis of design parameters, automotive application, and metallurgical integrity.
The OEM 43019-SR3-000 part number defines a rear left hydraulic brake caliper assembly, historically engineered for iconic Honda and Acura passenger platforms (such as the Civic EG/EK/EJ and Integra DC2 series). When sourcing this component, B2B procurement managers demand strict compliance with dimensional limits, piston bore tolerances, and actuation mechanics to avoid brake fluid bypass or uneven pad wear.
At Wenzhou BIT, we produce this caliper using high-tensile nodular cast iron (SG Iron), which offers far greater resistance to fatigue and thermal stress compared to cheaper gray iron alternatives. The internal cylinder wall is honed to a mirror finish (Ra ≤ 0.4 μm) to prevent damage to the EPDM rubber seals during thousands of heat-cool cycles.
| Critical Design Metric | OEM Specification (43019-SR3-000) | Wenzhou BIT Factory Tolerance |
|---|---|---|
| Piston Diameter | 34.00 mm | ±0.02 mm |
| Casting Material | SG Iron GGG40 / QT450 | Guaranteed (Tensile Strength ≥ 450 MPa) |
| EPDM Seal Quality | DOT-4 / DOT-5.1 Compatible | 100% Tested (-40°C to +150°C) |
| Surface Finish | Trivalent Zinc Plating (Cr3+) | Salt Spray Test > 120 Hours (White Rust) |
Discover the precise engineering stages that convert raw castings into safety-critical braking components.
Once the raw caliper body is formed in our foundry, it undergoes precision machining on Computer Numerical Control (CNC) machines. This critical stage involves:
Every single caliper assembly is subjected to high-pressure pneumatic leak testing (up to 16 MPa) and low-pressure testing (0.4 MPa) before leaving our automated assembly lines.
Please check the catalog as the process below:
1. Click the picture you are interested in (this opens the full PDF catalog for that specific product category).
2. Locate the navigation index at the bottom of the catalog directory.
3. Click the Open Mirror Button to view a clear, high-resolution directory list.
4. Use the built-in Search Button to enter OEM codes such as 43019-SR3-000.
(If you cannot find the specific part in our published catalog, please contact our support team immediately.)
Why sourcing from Wenzhou BIT provides a sustainable market advantage for global aftermarket brands.
Our location in Wenzhou grants us direct access to high-quality raw materials, dedicated heat-treatment facilities, and specialized surface treatment plants, cutting down production lead times by up to 30% compared to non-clustered factories.
With over 10,000 active mold patterns, we rapidly adapt production lines from older JDM replacement calipers like the 43019-SR3-000 to the latest smart EPB systems, optimizing initial capital investments for OEM private-label brands.
We combine digital coordinate measuring machines (CMM) with hardness testers and ozone resistance tests for rubber boots to ensure that every shipment matches standard technical tolerances and provides a long service life.
Adapting mechanical hydraulic platforms to modern performance and environmental standards.
The global automotive aftermarket is experiencing a dual-track development. While Electric Vehicles (EVs) require complex Electric Parking Brake (EPB) systems, classic platforms and high-volume commuter models worldwide still rely heavily on conventional hydraulic disc brake calipers like the 43019-SR3-000.
Furthermore, international import regulations are shifting towards environmentally friendly surface treatments. Traditional hexavalent chromium (Cr6) finishes have been phased out due to strict REACH and RoHS directives in Europe. Wenzhou BIT remains ahead of these regulations by utilizing compliant trivalent zinc plating and eco-friendly organic coatings, ensuring hassle-free imports and customs clearance for our partners.
Ensuring absolute product reliability and streamlined B2B cooperation.
We provide custom laser-engraving for part numbers, brand logos, and specific production batch codes to support complete product traceability and build brand equity in regional markets.
From single-box neutral layouts to heavy-duty, moisture-resistant master cartons designed for sea freight transit, we ensure calipers arrive in perfect, rust-free condition.
Our quality management systems align with the stringent automotive quality standard IATF 16949, guaranteeing consistent performance across all production runs.
Answers to common technical, manufacturing, and sourcing inquiries from global buyers.
Premature failure is typically caused by moisture ingress through poor-quality EPDM dust boots or internal bore corrosion from substandard casting processes. At Wenzhou BIT, we use premium heat-resistant EPDM rubber seals and hone cylinder bores to Ra ≤ 0.4 μm to prevent seal wear and leakage.
Yes, we manufacture both the main caliper body and the corresponding caliper brackets. We can ship them as pre-assembled units or individual components based on your target market requirements.
All hydraulic calipers receive a trivalent zinc plating (Cr3+) or specialized paint coating, which is tested in-house using salt spray chambers to ensure over 120 hours of resistance to white rust, making them suitable for harsh winter climates.
For catalog items with existing tooling, our standard MOQ starts at 50-100 units per reference. For brand-new custom cast designs, the tooling and initial batch MOQ will depend on the geometric complexity of the casting.
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.
Explore more OEM numbers and replacement parts for global vehicle passenger applications.
BIT Automobile
