Coolant Hose – 5Q0 121 087B (OE)

Description

Product Description

The 5Q0121087B Coolant Hose / Water Pipe is an OE‑style replacement used on various Volkswagen and Audi MQB‑platform vehicles. This molded coolant line routes coolant between key cooling system components (such as the engine outlet, thermostat/water pump area, radiator and/or heater circuit), ensuring correct coolant flow and stable engine operating temperature.

Over time, coolant hoses and plastic/composite coolant lines can harden, swell, or develop cracks from constant heat cycles and pressure. Sealing points can also begin to seep, causing gradual coolant loss, low‑coolant warnings, or overheating concerns. Replacing the worn line with a new 5Q0121087B restores proper coolant routing and helps maintain a leak‑free cooling system.

• OEM reference: 5Q0 121 087B
• OE‑style molded coolant hose/water pipe for correct routing and fit
• Heat‑ and pressure‑resistant construction for long service life
• Designed to match factory hose bends, mounting points, and connections
• Helps prevent coolant leaks and maintain proper engine temperature
• Direct‑fit replacement; no modifications required

Applications

Used on select Volkswagen and Audi models that specify coolant hose/water pipe part number 5Q0121087B. Fitment varies by engine code and model year; confirm by VIN or parts catalog.

(Always verify compatibility via VIN and by matching the part number and connection layout on your existing hose/pipe before ordering.)

Service Notes

• Replace any associated O‑rings, seals, or hose clamps during installation to ensure a long‑lasting seal.
• Refill with approved VW/Audi G12++/G13 coolant and properly bleed the cooling system after service.
• Inspect nearby plastic coolant connectors and hoses; replacing aged components together can prevent repeat leaks.

Additional information

No fitment data available.