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Details
| Specification | Value |
|---|---|
| Brand | ADR |
| Length [mm] | 380 mm |
| Outer Diameter [mm] | 259 mm |
| Diameter up to [mm] | 300 mm |
| Weight [g] | 6509 g |
| Thread Size 1 | M12 x 1.75 |
| Thread Size 2 | M22 x 1.5 |
OE numbers (4)
Search by this OE number to find compatible parts
- MERITOR—21221307
- MERCEDES-BENZ—946 328 1401
- MERCEDES-BENZ—A946 328 1401
- MERITOR—MLF7080
About this product
Sourced from ADR, this bellow air suspension (51304603) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Length [mm]: 380 mm, Outer Diameter [mm]: 259 mm, Diameter up to [mm]: 300 mm, Weight [g]: 6509 g, Thread Size 1: M12 x 1, 75 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 10.26003, 1026003, 21221307, 39434 and 12 more. Matching these numbers confirms a like-for-like replacement with no loss of function. ADR is a recognised supplier of automotive suspension components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (10)
Bellow Air Suspension ADR 51304603 — compatible car models
| Manufacturer article number (MPN) | 51304603 |
|---|---|
| OE part numbers | 21221307, 946 328 1401, A946 328 1401, MLF7080 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
ADR 51304603 . Diameter up to [mm]: 300 mm. Length [mm]: 380 mm. Outer Diameter [mm]: 259 mm. Thread Size 1: M12 x 1,75. Thread Size 2: M22 x 1,5. Weight [g]: 6509 g
- 1x Bellow Air Suspension
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Bellow Air Suspension compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Bellow Air Suspension fits. All fitment data is verified through TecDoc.
What specifications does this ADR Bellow Air Suspension have?
This ADR Bellow Air Suspension has the following specifications: Length [mm]: 380 mm; Outer Diameter [mm]: 259 mm; Diameter up to [mm]: 300 mm; Weight [g]: 6509 g; Thread Size 1: M12 x 1,75; Thread Size 2: M22 x 1,5. Check the full specifications table above for complete details.
What OE part numbers does this Bellow Air Suspension replace?
This Bellow Air Suspension replaces OE part numbers: 21221307, 946 328 1401, A946 328 1401, MLF7080. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Bellow Air Suspension cost?
Bellow Air Suspension prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this ADR Bellow Air Suspension. All parts come with our 14-day money-back guarantee.
How do I know when to replace my Bellow Air Suspension?
Regular inspection of your Bellow Air Suspension is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Bellow Air Suspension?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Bellow Air Suspension fitted by a professional mechanic.
Can I use this part as a replacement for OE 21221307?
Yes, this ADR Bellow Air Suspension is a direct replacement for OE part number 21221307. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
