A6383280501 Rear Air Suspension Spring Bag For Mercedes‑Benz W638

A6383280501 Rear Air Suspension Spring Bag for Mercedes‑Benz W638

1. Product Introduction

Original OE Number: A638 328 0501 Product Name: Mercedes‑Benz W638 Viano / Vito Rear Air Spring, Rear Air Suspension Spring Bag Assembly Installation Position: Rear air suspension, interchangeable for left and right side. This is a complete air spring bag assembly integrated with rubber bellows and upper‑lower flange bases, direct replacement for original rear air spring, shock absorber damper not included.

Product Description A638 328 0501 is the dedicated rear air spring for Mercedes‑Benz W638 chassis commercial vehicles. Viano and Vito carry heavy rear‑axle load. Under long‑time load, repeated compression, rain‑snow erosion and temperature variation, original air spring rubber bellows tend to crack, bulge and leak air. Common symptoms: rear sagging after parking, slow / fast air leakage, frequent air compressor cycling, uneven body height, abnormal suspension level. This rear air spring is 1:1 precision molded according to original W638 specification. Flange mounting holes, bellows travel and pressure‑bearing parameters match OEM standard. Multi‑ply reinforced weather‑resistant rubber provides excellent crack‑resistance, fatigue resistance and air tightness. Direct bolt‑on replacement without modification, fully compatible with original air suspension system. Widely used for garage repair and wholesale aftermarket replacement.

Core Advantages

• ✅ 1:1 OEM replication, identical flange holes, dimension and load parameter for direct bolt‑on fit
• ✅ Solves typical W638 rear air suspension faults: rear sagging, air leakage, uneven ride height, frequent compressor operation
• ✅ Complete ready‑to‑install air spring assembly with integrated top & bottom flange, no extra assembly required
• ✅ Multi‑ply reinforced rubber bellows, anti‑aging, anti‑cracking, excellent fatigue performance, low rework rate
• ✅ Every unit tested under air pressure for air tightness before delivery
• ✅ No coding required after installation; perform leak test and height calibration to finish repair

2. Custom Attributes (E‑commerce Listing)

Brand: Mercedes‑Benz Chassis Code: W638 Compatible Vehicle: Viano, Vito Applicable Version: Models with factory rear air suspension Applicable Years: 1996‑2003 Installation Position: Rear Air Spring, Left & Right Universal Product OE: A638 328 0501 Product Type: Rear Air Spring / Rear Air Suspension Bag Assembly Assembly Feature: Complete air spring bag assembly (damper shock absorber excluded) Material: Multi‑ply reinforced rubber bellows, high‑strength engineering plastic flange, metal crimp ring Process Standard: OEM parameter replication, integrated crimp molding, anti‑aging treatment, factory air‑pressure leak test Compatibility Note: Only fits W638 vehicles equipped with factory air suspension. Not for mechanical spring versions. Only replaces rear air spring, shock damper is not included.

3. Compatible Vehicles

Important Note: This rear air spring is universal for rear left and rear right of W638 chassis. For rear axle only, not suitable for front suspension.

1. Mercedes‑Benz Viano (W638, factory air suspension)
2. Mercedes‑Benz Vito (W638, factory air suspension)

Applicable Years: 1996‑2003

4. Interchangeable OE Numbers

Main OE: A638 328 0501 Interchangeable OE: A638 328 0601 A638 328 0701

Interchange Remark: These are original super‑session OE numbers. Identical dimension, flange layout and load performance, direct interchange without any modification.

5. FAQ

Q1: Can this air spring be fitted for both rear left and rear right?

A: Yes, universal for rear left and rear right on W638. Only for rear axle, cannot be used for front suspension.

Q2: Does it need programming after installation?

A: No coding or programming required. Complete leak test and vehicle height calibration, clear fault codes, then ready for operation.

Q3: Is it suitable for Vito with mechanical coil spring?

A: No. Only for factory‑equipped air suspension W638 models. Mechanical spring chassis has no mounting structure for air spring.

Q4: What is the difference between interchange OE numbers?

A: No difference in performance and dimension. Only different OEM batch codes, fully interchangeable.

Q5: When should I replace the whole air spring assembly?

A: Replace full air spring when rubber bellows crack, bulge, fast leak or flange rubber is heavily damaged. Repair kit is not recommended for such severe damage.

6. Custom Service

1. OEM & Private Label: Custom logo printing, neutral no‑mark export package, color box for Amazon, eBay, and other cross‑border platforms.
2. Bulk Supply: Large stock for A638 328 0501 rear air spring, support bulk and full‑container export orders with stable lead‑time.
3. One‑stop Air Suspension Parts: Supply W638 air compressor, distribution valve, height sensor and related components together.
4. E‑commerce Material Support: Provide real‑shoot photos, detail pictures, parts list and fitment documents for store listing.