Original OE Number: A639 328 0101
Product Name: Mercedes-Benz W639 Vito / Viano Rear Air Spring, Rear Air Suspension Spring Bag Assembly
Installation Position: Rear air suspension, universal for left and right sides. This is a complete air spring assembly integrated with rubber bellows and upper & lower flange base. Direct replacement for the original rear air spring. Shock absorber damper is not included.
Product Description
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.
Core Advantages
- 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
Brand: Mercedes-Benz
Chassis Code: W639
Compatible Model: Vito, Viano
Applicable Version: Models with factory rear air suspension
Applicable Years: 2003–2014
Installation Position: Rear Air Suspension, Universal Left / Right
Product OE: A639 328 0101
Product Type: Rear Air Spring / Rear Air Suspension Bag Assembly
Assembly Type: Full air spring assembly (shock absorber damper not included)
Material: Multi-layer reinforced rubber bellows, high-strength engineering plastic flange, metal pressure ring
Production Standard: OEM parameter replication, integral crimp molding, anti-aging treatment, factory air pressure leakage test
Compatibility Note: Only fits W639 models equipped with factory air suspension. Not suitable for mechanical spring versions. This product only replaces the rear air spring, excluding the shock absorber body.
Sales Mode: Spot wholesale, cross-border retail, full container export orders
Inspection Standard: Factory air pressure test, full appearance inspection, dimension calibration verification
Packaging: Neutral carton packaging, customized color box available
Working Condition: Heavy-load rear axle commercial vehicle, suitable for city roads, highways and long-distance transportation
Risk Warning: Over-pressure operation prohibited; professional leakage test required after installation; not applicable for front suspension
Recommended Matching Parts: Can be installed together with air compressor, height sensor and buffer block for complete repair
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.
- Mercedes-Benz Vito (W639, factory air suspension)
- Mercedes-Benz Viano (W639, factory air suspension)
Applicable Years: 2003–2014
Main OE Number: A639 328 0101
Interchangeable OE Numbers:
- 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.
Q1: Is this air spring universal for rear left and rear right?
A: Yes, it is universal for rear left and rear right on W639 chassis. It is only used for rear axle and cannot be installed on front suspension.
Q2: Does it need programming or coding after installation?
A: No programming required. After installation, complete air tightness test, body height calibration and fault code clearing for normal use.
Q3: Does it fit mechanical spring suspension models?
A: No. This product only fits W639 models originally equipped with factory air suspension. Mechanical suspension chassis has no corresponding installation structure.
Q4: What is the difference between interchangeable OE numbers?
A: No difference in performance, size and installation. Only different factory batch codes, fully interchangeable for replacement.
Q5: When should I replace the full air spring assembly?
A: Full assembly replacement is required if the rubber bellows is cracked, bulged, delaminated, leaking rapidly or severely aged. Repair kits are not recommended for such damaged conditions.
