HomeBelts and Cooling > Radiators, Coolers and Related ComponentsURO 8E0121403 Engine Coolant Reservoir
Part #: 8E0121403

URO 8E0121403 Engine Coolant Reservoir

21 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$32.43Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Audi, A4 and A4 Quattro
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of URO Engine Coolant Reservoir for Audi A4 Models

The URO Engine Coolant Reservoir with part number 8E0121403 is designed specifically for Audi A4 and Audi A4 Quattro vehicles. This component plays a critical role in maintaining proper coolant levels and ensuring efficient engine temperature regulation.

  • Compatible with Audi A4 and Audi A4 Quattro models
  • OEM-quality replacement part number 8E0121403
  • Engine coolant reservoir designed for reliable coolant storage and overflow management
  • Constructed to meet or exceed original equipment specifications
  • Durable material resistant to heat and pressure fluctuations

Detailed Product Description

The URO Engine Coolant Reservoir (part number 8E0121403) is engineered to provide a precise fit and function for Audi A4 and A4 Quattro vehicles. This reservoir stores excess coolant fluid and allows for expansion and contraction of the coolant as the engine heats and cools. Maintaining the correct coolant level is essential to prevent overheating and ensure optimal engine performance. Manufactured to meet strict quality standards, this reservoir offers durability and resistance to the thermal stresses common in engine compartments.

Common Applications and Problem Resolution

  • Replacement for cracked or leaking coolant reservoirs
  • Solves coolant overflow and loss issues
  • Prevents engine overheating caused by insufficient coolant levels
  • Addresses coolant contamination due to reservoir damage
  • Restores proper coolant system pressure balance

Installation Notes and Tips

When installing the URO Engine Coolant Reservoir 8E0121403, ensure the vehicle is cool to avoid injury from hot coolant. Carefully drain the existing coolant if necessary and disconnect the old reservoir hoses. Verify hose connections and clamps are secure to prevent leaks. After installation, refill the coolant system and bleed air pockets to maintain proper coolant circulation.

Quality Assurance and Warranty

URO parts are manufactured to meet or exceed OEM standards, ensuring reliable performance and fitment. While specific warranty details for part number 8E0121403 may vary, URO typically offers coverage against manufacturing defects. Refer to the product documentation or supplier for exact warranty terms.

This part fits 21 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2009AudiA4CabrioletN/AIncludes level sensor
2009AudiA4 QuattroCabrioletN/AIncludes level sensor
2008AudiA42.0LL4N/A
2008AudiA4 QuattroN/A
2007AudiA43.2LV6N/A
2007AudiA42.0LL4N/A
2007AudiA4 QuattroN/A
2006AudiA4N/A
2006AudiA4 Quattro3.2LV6N/A
2006AudiA4 Quattro2.0LL4N/A
2005AudiA42.0LL4N/A
2005AudiA41.8LL4N/A
2005AudiA4 Quattro3.2LV6N/A
2005AudiA4 Quattro2.0LL4N/A
2005AudiA4 Quattro1.8LL4N/A
2004AudiA41.8LL4N/A
2004AudiA4 Quattro1.8LL4N/A
2003AudiA41.8LL4N/A
2003AudiA4 Quattro1.8LL4N/A
2002AudiA41.8LL4N/A
2002AudiA4 Quattro1.8LL4N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

3767371318E0 121 4038E0121403URO-003989V10-8282

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.