Audi A4 A5 Q5 Coolant Expansion Tank Hose 8K0121081BH

Coolant Expansion Tank Hose ¡ª 8K0121081BH

Don't let a small hose cause a big problem. This coolant expansion tank hose connects your engine's cooling system to the coolant reservoir, allowing the system to breathe and maintain proper pressure as temperatures rise and fall. A cracked or deteriorated hose can lead to coolant leaks, overheating, and costly engine damage ¡ª making this an essential part to inspect and replace at the first sign of wear.

Compatible Part Number

• 8K0121081BH

Compatible Vehicles

• Audi A4 (B8)
• Audi A5 (8T)
• Audi Q5 (8R)

Signs of a Failing Coolant Hose

• Visible cracks, swelling, or soft spots on the hose
• Coolant smell from the engine bay
• Low coolant warning light or frequent top-ups needed
• Engine running hotter than normal
• Coolant puddle under the vehicle after parking

Product Highlights

• ? Direct OEM replacement ¡ª exact fit for A4, A5 & Q5
• ? Heat and pressure resistant rubber construction
• ? Maintains a leak-free seal in the cooling circuit
• ? Prevents overheating and protects engine internals
• ? Easy DIY installation ¡ª no special tools required

Recommended for inspection during every coolant service. Replace immediately if any cracking, softness, or leaking is detected. Always allow the engine to cool completely before working on the cooling system.