B32H-34-300 B32H-34-350 MAZDA 3BK 2003-2009 Suspension Arm

The control arm body is manufactured from SPHC hot-rolled steel, a material commonly used in automotive structural and chassis load-bearing components due to its stamping formability and weldability. The ball joint stud is made of 40Cr alloy structural steel, heat-treated to achieve strength and wear resistance suited to the repeated dynamic loading conditions found in suspension systems. The bushing is manufactured from natural rubber, providing elastic deformation and recovery to absorb vibration and impact transmitted through the vehicle body, while also serving a cushioning and sealing function at the connection points between the control arm and the subframe or steering knuckle.

The product is delivered as a fully assembled unit combining the control arm body, ball joint assembly, and bushing. After stamping and forming, the arm body has the bushing and ball joint pressed into place at each end, forming a complete suspension linkage unit. Mounting hole positions, ball joint taper dimensions, and stud diameter are manufactured to the original specifications of the Mazda 3 BK platform, with hole spacing and angles matching the connection points on the vehicle body and subframe. The bushing is installed using a press-fit process, forming an interference fit with the arm body to maintain joint integrity over extended use.

The control arm body undergoes E-coating surface treatment, with the coating applied uniformly across all stamped surfaces, including weld seams, flange edges, and internal cavities, forming a protective layer over the steel substrate against corrosion caused by moisture, road salt, and other environmental exposure. The E-coating finish presents a uniform matte black appearance with coating adhesion suited to the long-term exposure conditions typical of chassis components. Alternative coating colors or processes (such as spray coating or Dacromet) can be discussed and confirmed separately based on customer requirements.

Part numbers B32H-34-300 and B32H-34-350 correspond respectively to the left- and right-side lower control arm mounting positions. Mounting hole spacing, ball joint stud diameter, ball joint taper angle, and bushing inner/outer diameter follow the original factory drawing specifications for the Mazda 3 BK (2003-2009) platform. Detailed dimensional drawings are available for buyer reference to confirm full compatibility with the original suspension system.

This product is intended for lower control arm replacement and repair on Mazda 3 vehicles (BK platform, 2003-2009 model years). The mounting interface matches the original suspension structure, allowing installation without modification to adjacent components such as the subframe or steering knuckle. Supplied as a complete assembly with the ball joint and bushing pre-installed, the product reduces on-site assembly steps, suiting the procurement needs of auto parts repair shops, dealership service centers, and suspension parts distribution channels.

The product is applied in passenger vehicle suspension system repair and maintenance, serving auto parts trading companies, aftermarket parts retail chains, vehicle repair and service businesses, and suspension assembly distributors, for use in scheduled maintenance, accident repair, and suspension component replacement on Mazda 3 BK vehicles.

Q: Which port do you ship the goods from?
A: The closest port to us is Ningbo  port /  Shanghai Port, or other specific locations per your requirements.

Q: ls it possible to know how my products going on without visiting your company?
A: We will offer a detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.

OEM: 
B32H-34-300    B32H-34-350
CC30-34-300     CC30-34-350
1212807
3513042
1362650

Car Model:
MAZDA 3BK 2003-2009 suspension arm
MAZDA 5 2005-2009 suspension arm