The part number 43230-SR3-G02 is a critical engineering specification referring to the rear left brake caliper assembly, primarily deployed across Japanese-designed compact and mid-sized vehicle platforms, notably Honda Civic (EG/EK) and Acura Integra. As a core component of the vehicle's hydraulic safety system, this rear caliper ensures proportional brake load distribution, prevents high-speed vehicle yaw, and integrates the mechanical parking brake system within a unified caliper housing.
In modern automotive design, the rear brake assembly operates under strict kinetic parameters. While front brakes absorb up to 70% of vehicle deceleration force, the rear assembly is responsible for directional stabilization and preventing rear-axle lift. The OEM 43230-SR3-G02 caliper features a single-piston sliding design, engineered to mitigate friction drag, maximize fuel efficiency, and offer precise tactile feedback to the driver. Achieving these performance levels requires strict adherence to metallurgical specifications, tight manufacturing tolerances, and specialized sealing systems.
| Technical Metric | OEM Standard Specification | Wenzhou BIT Factory Standards |
|---|---|---|
| Piston Diameter | 34.0 mm nominal | 34.0 mm ± 0.02 mm (Micro-honed surface) |
| Casing Material | ASTM A48 Class 30 Grey Cast Iron | HT250 High-Tensile Nodular Cast Iron (Enhanced Fatigue Limit) |
| Seal Compound | Standard EPDM Rubber | High-temperature Aerospace-grade EPDM (Working limit: -45°C to 150°C) |
| Anti-Corrosion Finish | Hexavalent Zinc Plating | Geomet® 321 / Cr3+ trivalent zinc plating (Salt-spray test > 350 hours) |
| Pressure Testing Bounds | 0.5 MPa - 10.0 MPa | Dual low-pressure air (0.4 MPa) & High-pressure hydraulic (15.0 MPa) |
For distributors and procurement managers, sourcing an OEM 43230-SR3-G02 replacement requires partnering with manufacturers who understand that even a minor variation of 0.05 mm in bore concentricity can cause premature piston sticking, uneven pad wear, or hydraulic fluid bypass. This level of detail is what separates OE-quality suppliers from budget aftermarket fabricators.
Originally established in 1998 as a focused component workshop, Wenzhou BIT Automobile Parts Co., Ltd. has evolved into a global leader in braking hydraulic technology. Our progress is defined by structured milestones, expanding from domestic component supply to establishing dedicated casting, machining, and testing facilities.
By optimizing our manufacturing lines, we have transitioned from classic mechanical brake calipers to high-tech Electronic Parking Brake (EPB) systems. Our international operations extend to over 30 countries across North America, Europe, Russia, and South America. Each market has unique needs, which we satisfy through local compliance, tailored packaging, and flexible production runs.
Precision is essential for automotive safety components. A brake caliper must guide the brake pads parallel to the brake rotor surface, ensuring uniform pressure distribution. Wenzhou BIT relies on multi-axis Computer Numerical Control (CNC) milling centers to achieve these strict alignment parameters.
Raw sand castings of HT250 gray/nodular iron undergo initial surface cleaning and positioning. Our CNC machines remove excess material, establishing precise datum planes. This phase prepares the casting for tight-tolerance machining while checking for internal void defects in the casting structure.
Critical interfaces are machined during this step, including the piston bore interior, sealing ring grooves, slider pin guides, and fluid inlet threads. We hone the piston bore surface to a roughness profile of Ra ≤ 0.4 μm. This smooth finish prevents fluid leakage past the EPDM rubber pressure seals.
Our catalog includes detailed engineering drawings and interactive 3D PDFs for review. If you need to view files for specific models, please check the catalog using these steps:
Automotive components must function reliably in diverse environments around the world. The OEM 43230-SR3-G02 caliper is designed for multiple localized operational scenarios:
In regions like Northern Europe, Canada, and the US Rust Belt, road salt accelerating corrosion is a major issue. Our calipers use zinc plating and specialized topcoats to protect against rust, ensuring sliding pins move freely and preventing uneven pad wear.
Megacities in Asia and South America expose brake components to high thermal loads. The OEM-spec caliper utilizes high-temperature piston seals that maintain elasticity and pressure containment under extreme heat, preventing brake fade.
As Civic (EG/EK) and Integra platforms age, car enthusiasts require parts that match the exact mounting dimensions of the original equipment. Our calipers fit factory mounts without modifications, maintaining the vehicle's original brake balance.
The global brake caliper market is shifting due to rising raw material costs, changing trade regulations, and increasing demand for Electric Parking Brake (EPB) systems. Traditional passenger cars rely on hydraulic calipers, while newer platforms are adopting electric actuators. By maintaining manufacturing capability for both designs, Wenzhou BIT supports older vehicle fleets while supplying modern replacement parts for newer models.
Wenzhou's automotive supply chain network provides key efficiency advantages. Wenzhou BIT leverages local manufacturing partnerships to source high-grade raw materials and maintain consistent production output.
We work directly with certified foundries to source raw cast iron. This ensures our metals meet chemistry targets, minimizing sulfur and phosphorus impurities that can cause micro-fractures under high brake line pressures.
Our tooling workshop designs and maintains casting molds. This capability allows us to update designs or adjust product dimensions within weeks, rather than waiting months for external tooling vendors.
Located near Ningbo and Shanghai ports, we coordinate international shipping to minimize container transit times. Our logistics team handles export documentation to streamline customs clearance for buyers.
For buyers concerned with supply chain risk, Wenzhou BIT manages minimum stocking levels for high-demand part numbers. This approach helps protect customers from fluctuating raw material costs and keeps deliveries on schedule.
As automotive technology advances, the industry is transitioning from mechanical parking brakes to Electronic Parking Brake (EPB) systems. Wenzhou BIT is adapting to this change by expanding our product range to include EPB calipers, actuator motors, and electronic integration kits.
Offering over 50 brackets matching OE dimensions, providing structural support to prevent twisting during high-torque deceleration.
Over 60 part numbers in stock. Built with high-torque gearboxes to lock and release brake pistons reliably.
Includes high-temperature dust boots, piston seals, slide pins, and grease for European and Asian vehicle applications.
This part number fits Honda Civic models (EG, EH, EJ, EK) and Acura Integra platforms (DC2, DB7/8) from 1992 through 2001 that are equipped with rear disc brake systems. It functions as the rear left hydraulic caliper assembly.
We machine the caliper bores to a Ra ≤ 0.4 μm surface finish and use aerospace-grade EPDM piston seals. Every assembly undergoes low-pressure pneumatic testing followed by high-pressure hydraulic tests up to 15.0 MPa to confirm sealing integrity.
Our standard option is trivalent zinc plating (Cr3+), which provides over 120 hours of salt spray resistance. For harsh winter climates, we offer Geomet® coatings and custom powder-coating finishes that exceed 350 hours of salt spray testing.
Yes. We provide complete caliper assemblies, including custom brackets, slide pins, dust boots, and installation hardware, to meet specific customer requirements.
Our standard MOQ is 50 pieces per part number. Lead times range from 30 to 45 days, depending on raw material availability and our production schedule. We also accommodate smaller pilot runs for testing and validation.
BIT Automobile
