A6393280101 Rear Air Spring Bag For Mercedes-Benz W639 Vito / Viano CE Certified

A639 328 0101 is a dedicated rear air spring for Mercedes-Benz W639 chassis commercial vehicles. Vito and Viano models feature heavy rear axle load. During long-term daily use, the original air spring undergoes continuous compression, stretching, rain and snow erosion, and extreme temperature changes. This easily causes rubber aging, cracking, bulging, delamination and air leakage.

Common vehicle faults include rear sagging after parking, slow or fast air leakage, frequent air compressor activation, uneven body height, and abnormal suspension level alerts.

This aftermarket air spring is 1:1 precision reproduced according to original W639 factory specifications. Flange mounting holes, bellows travel distance, and pressure-bearing parameters fully match OEM standards. Adopting multi-layer reinforced weather-resistant rubber material, it delivers excellent crack resistance, tensile fatigue resistance and stable air tightness. It can directly replace the original damaged air spring without any modification and is fully compatible with the original factory air suspension system. It is a high-quality replacement part widely used for professional garage maintenance and bulk export aftermarket sales.

• 1:1 OEM standard replication, identical flange position, size and pressure parameters for perfect bolt-on installation
• Solves common W639 rear air suspension problems: rear sagging, air leakage, unbalanced body height, frequent compressor operation
• Complete integrated air spring assembly with upper and lower base, ready for direct installation without extra assembly work
• Multi-layer reinforced rubber bellows, anti-aging, anti-cracking and fatigue-resistant, effectively reducing later leakage failure rate
• Every product undergoes strict factory air pressure and air tightness testing for stable quality
• Fully compatible with original air suspension system; only leak test and height calibration required after installation, no programming needed

Compatibility Instruction: This rear air spring is universal for rear left and rear right of W639 chassis. Only suitable for rear axle, not for front suspension.

1. Mercedes-Benz Vito (W639, factory air suspension)
2. Mercedes-Benz Viano (W639, factory air suspension)

• A639 328 0201
• A639 328 0301

Interchange Remark: The above OE numbers are original factory upgraded alternative parts. They share identical size, flange structure and pressure performance, 100% interchangeable without vehicle modification or compatibility issues.

• OEM & Private Label Customization: Support custom logo printing, neutral no-label export packaging and customized color boxes for Amazon, eBay, AliExpress,  and other cross-border platforms.
• Bulk Supply Service: Large quantity in stock, support bulk wholesale and full-container export orders with long-term stable supply.
• Complete Air Suspension Parts Supply: One-stop supporting parts including W639 air compressor, distribution valve, height sensor and other related accessories.
• E-commerce Material Support: Provide real product photos, detailed close-up images, parts lists and fitting documents for direct store listing.