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SA12-34-470

Brand: Haima

Model: S5

Product Name：Front bushing

Part Number: SA12-34-470

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Product Details

Comprehensive Professional Description: Haima S5 Front Bushing (Part No. SA12-34-470)

1. Basic Overview & Core Functional Positioning

The SA12-34-470 is an authentic Original Equipment Manufacturer (OEM) front bushing, precision-engineered exclusively for the Haima S5—a compact crossover SUV celebrated for its agile handling, urban practicality, and reliable off-road capability. As a critical component of the Haima S5’s front suspension system, the front bushing serves as a vibration-dampening interface between the front control arm (or subframe) and the vehicle’s chassis, playing an irreplaceable role in isolating road harshness, preserving steering precision, and ensuring ride comfort. The unique part number SA12-34-470 acts as a definitive identifier, guaranteeing strict compliance with Haima’s original engineering specifications, material standards, and performance requirements, making it the only authorized replacement part for the front bushing of all Haima S5 production years (2014–present) and all trim levels, as confirmed by Haima’s official OEM fitment data and global supply chain records.

The Haima S5’s front suspension typically employs a MacPherson strut design, optimized for balanced responsiveness and efficiency in both city driving and light off-road scenarios. The SA12-34-470 Front Bushing is installed at the front lower control arm mounting points (or subframe brackets), forming a flexible yet rigid connection that allows controlled suspension articulation while minimizing noise, vibration, and harshness (NVH) transfer to the cabin. Operating in a dynamic environment exposed to repeated mechanical loads, road debris, temperature fluctuations, and exposure to engine oil, brake fluid, and environmental contaminants, the bushing must maintain exceptional elasticity, durability, and corrosion resistance to avoid premature degradation.

A worn, cracked, or detached front bushing can lead to a range of severe issues, including steering wheel play, uneven tire wear, excessive road noise, chassis vibration, and compromised handling—especially during cornering or over rough terrain. Such failures not only degrade driving comfort but also increase safety risks, as the bushing’s failure can disrupt suspension geometry and reduce vehicle stability. As a genuine OEM component, the SA12-34-470 is manufactured to match the Haima S5’s exact suspension geometry, mounting dimensions, and load requirements, ensuring seamless integration with the vehicle’s existing suspension components (e.g., control arms, struts, and subframes) and eliminating compatibility issues common with generic aftermarket alternatives.

SA12-34-470

2. Premium Material Selection & Precision Manufacturing Process

The SA12-34-470 Front Bushing is crafted from high-performance, automotive-grade materials selected to meet the strict demands of a suspension component operating in cyclic stress and environmental exposure. Its design balances flexibility (for vibration isolation) and rigidity (for load transmission), ensuring optimal performance across all driving conditions.

Core Material Composition

The bushing consists of three key integrated components, each using specialized materials for maximum durability:

Inner/Outer Metal Sleeves: Constructed from high-strength cold-rolled carbon steel (e.g., Q235B or SPHC)，with a precision-machined surface finish and corrosion-resistant electroplated or powder-coated finish. These metal sleeves provide the structural foundation for mounting, ensuring secure attachment to the control arm and chassis bracket while resisting deformation under load.
Elastomer Core: The central damping element is made from synthetic rubber (EPDM—Ethylene Propylene Diene Monomer)，formulated to meet Haima’s OEM specifications. EPDM is chosen for its excellent resistance to heat, ozone, UV radiation, and automotive fluids，as well as its long-term elasticity and fatigue durability. The rubber is precision-molded to a specific durometer (Shore A 55–65) to balance vibration isolation and load-bearing capacity，critical for maintaining ride comfort and handling in the Haima S5.
Adhesive Bonding Layer: A high-strength, heat-resistant adhesive bonds the elastomer core to the inner and outer metal sleeves, preventing delamination under cyclic stress and ensuring uniform load distribution. This bonding is critical to avoiding separation, which would lead to bushing failure and increased NVH.

SA12-34-470

3. Structural Design & Key Functional Features

The SA12-34-470 Front Bushing features a cylindrical, two-piece metal-sleeve design with a molded elastomer core，meticulously engineered to match the Haima S5’s front suspension geometry. Its structural design is optimized to balance flexibility (for vibration isolation) and rigidity (for load transmission), ensuring optimal performance and durability.

Key Structural Components

Inner Metal Sleeve: A precision-machined cylindrical tube with a smooth inner surface to fit the mounting bolt, and a textured outer surface to enhance adhesion with the elastomer core. The inner diameter is precisely calibrated to match the Haima S5’s control arm or subframe bolt (typically M12 or M14), ensuring a tight, secure fit without play.
Outer Metal Sleeve: A slightly larger cylindrical tube that fits into the control arm or chassis bracket. Its outer surface is engineered to match the mounting bore dimensions of the Haima S5’s suspension components, ensuring seamless installation and load transfer.
Elastomer Core: A molded rubber cylinder bonded between the inner and outer sleeves, featuring a variable-durometer design (softer in the center for maximum vibration isolation, slightly stiffer at the edges for load transmission). The rubber core is designed to withstand cyclic compression and torsion (±5° deflection) during normal driving, absorbing road irregularities and minimizing NVH transfer to the cabin.
Integrated Dust Boot (Optional): Some variants include a flexible EPDM dust boot attached to the ends of the metal sleeves, preventing dirt, water, and debris from entering the bushing and protecting the elastomer core from contamination and premature degradation.

Critical Design Features

Controlled Deflection Geometry: The bushing’s shape and elastomer properties are engineered to provide controlled deflection in vertical and lateral directions, allowing the front control arm to move freely during suspension articulation while maintaining steering precision. This design ensures the Haima S5’s suspension geometry remains stable, reducing tire wear and improving handling.
Corrosion-Resistant Coatings: All metal components are coated with a high-quality electroplated or powder-coated finish (e.g., zinc plating or epoxy powder coating) to resist rust and corrosion, even in harsh environments such as coastal areas (high humidity) or regions with heavy road salt use.
Uniform Load Distribution: The bonded elastomer core ensures even distribution of mechanical loads between the inner and outer sleeves, preventing stress concentrations and reducing the risk of rubber cracking or metal sleeve deformation. This design extends the bushing’s service life and maintains consistent performance over time.

SA12-34-470