ContiTech 661N6 Air Spring Bus Air Suspension Shock Absorber Airbag Universal

ContiTech 661N6 Air Spring for Bus Air Suspension

Universal air spring (airbag) matched to the ContiTech 661N6 specification, used on the air suspension of coaches and city buses. The bellows carries the axle load while the compressed air inside absorbs road shock, so ride height stays level whether the bus is empty or fully loaded. This is the part to fit when the rear or front axle sags on one side, the bus leans in corners, or the compressor runs constantly to hold pressure.

Product Highlights

• 661N6 matched specification - same working height, diameter and load range as the original unit
• ContiTech grade rubber compound - high fatigue resistance for constant load cycling
• Coated steel piston - anti-rust finish for humid and coastal operation
• Sealed air connection - factory style port thread holds pressure without leaking
• Universal fitment - suits most coach and city bus air suspension layouts using the 661N6
• Balanced ride height - restores level body attitude and protects the air compressor

Technical Specifications

Fault Signs of a Failed Air Spring

• Bus sits low on one side, or ride height drops overnight
• Compressor runs continuously and the air dryer cycles too often
• Visible cracks, bulges or chafing on the rubber bellows
• Hissing air at the bellows or at the air port connection
• Body leans in corners and the ride becomes harsh over bumps

Installation Notes

1. Deflate the air system fully and support the chassis on stands before removal.
2. Disconnect the air line and cap the pipe to keep moisture and dirt out.
3. Fit the new spring without twisting the bellows, then tighten the mounting fixings evenly.
4. Refill the system, check ride height and confirm there are no leaks at the port and fixings.

Packing and Supply

Each air spring is protected with foam, boxed and packed in an export carton. Neutral packing and mixed container loading with other bus chassis and suspension parts are available.

Order Support

Send us the original air spring photo with the model number and the bus model, and we will confirm the matching spring, quantity and price within one working day.