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URO 3B0121321 Engine Coolant Reservoir CapOE Quality 60-Day Returns
Part #: 3B0121321

URO 3B0121321 Engine Coolant Reservoir Cap

337 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Audi and Volkswagen, A3, A3 Quattro, A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, A7 Quattro, allroad, Allroad Quattro, Beetle, CC, Eos, Golf, GTI, Jetta, Passat, Q5, Q7, R32, RS4, RS6, RS7, S4, S5, S6, S7, SQ5, Touareg, TT, and TT Quattro
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Not what you need? See all Engine Coolant Reservoir Cap options

Engine Coolant Reservoir Cap for Audi and Volkswagen

This URO engine coolant reservoir cap is a direct-fit replacement for select Audi and Volkswagen cooling systems with a low profile handle. Built to match OE cap dimensions, it helps maintain proper sealing and pressure control in the coolant recovery tank.

  • Guaranteed fitment for listed applications
  • Precision-molded to OE cap dimensions for original and aftermarket coolant recovery tanks
  • Heat-resistant cap and seal materials for cooling system service
  • Factory pressure-tested for fit and function
  • 24 Month Unlimited Mileage Warranty

Fitment and Cross Reference

Compatible with many Audi A4, A4 Quattro, A6, A6 Quattro, A3, TT, Q5, Q7, S4, S5, S6, S7, RS4, RS6, allroad, and Volkswagen Jetta, Golf, GTI, Passat, Beetle, CC, Eos, Touareg, and R32 applications with a low profile handle. This part number 3B0121321 also cross-references VAICO V10-0490 for the same application.

What This Cap Helps Address

  • Coolant loss from a worn or cracked reservoir cap seal
  • Pressure retention issues in the expansion tank
  • Steam or coolant odor caused by a weak cap seal
  • Cooling system warning lights related to cap sealing problems
  • Fitment issues when replacing an OE-style low profile handle cap

Installation Notes

Verify the reservoir style and handle profile before installation. This cap is specified for vehicles listed with a low profile handle, including some Audi A4 and A4 Quattro low profile version applications. Inspect the tank neck and sealing surface for damage before installing part number 3B0121321.

Quality Assurance

URO manufactures this coolant reservoir cap with OE-style dimensions and pressure testing to support proper cooling system operation. Backed by a 24 Month Unlimited Mileage Warranty.

This part fits 337 vehicles. Search below:

YearMakeModelSubmodelBody TypeLitersCylindersFuel TypePositionNotes
2016AudiA4N/Aw/ Low profile handle
2016AudiA4 QuattroN/Aw/ Low profile handle
2016VolkswagenJettaN/A
2015AudiA4N/Aw/ Low profile handle
2015AudiA4 QuattroN/Aw/ Low profile handle
2015AudiallroadN/Aw/ Low profile handle
2015AudiQ7N/Aw/ Low profile handle
2015AudiSQ5N/Aw/ Low profile handle
2015VolkswagenJettaN/A
2015VolkswagenJettaN/Aw/ Low profile handle
2014AudiA4N/Aw/ Low profile handle
2014AudiA4 QuattroN/Aw/ Low profile handle
2014AudiA5N/Aw/ Low profile handle
2014AudiA5 QuattroN/Aw/ Low profile handle
2014AudiA6N/Aw/ Low profile handle
2014AudiA6 QuattroN/Aw/ Low profile handle
2014AudiA7 QuattroN/Aw/ Low profile handle
2014AudiallroadN/Aw/ Low profile handle
2014AudiQ5N/Aw/ Low profile handle
2014AudiQ7N/Aw/ Low profile handle
2014AudiRS7N/Aw/ Low profile handle
2014AudiS4N/Aw/ Low profile handle
2014AudiS5N/Aw/ Low profile handle
2014AudiS6N/Aw/ Low profile handle
2014AudiS7N/Aw/ Low profile handle
2014AudiSQ5N/Aw/ Low profile handle
2014AudiTT QuattroN/Aw/ Low profile handle
2014VolkswagenBeetleN/Aw/ Low profile handle
2014VolkswagenCC2.0LL4N/Aw/ Low profile handle
2014VolkswagenEosN/Aw/ Low profile handle
2014VolkswagenGolfN/Aw/ Low profile handle
2014VolkswagenGTIN/Aw/ Low profile handle
2014VolkswagenJettaN/A
2014VolkswagenJettaN/Aw/ Low profile handle
2014VolkswagenPassatN/Aw/ Low profile handle
2014VolkswagenTouaregN/Aw/ Low profile handle
2013AudiA3N/Aw/ Low profile handle
2013AudiA3 QuattroN/Aw/ Low profile handle
2013AudiA4N/Aw/ Low profile handle
2013AudiA4 QuattroN/Aw/ Low profile handle
2013AudiA5N/Aw/ Low profile handle
2013AudiA5 QuattroN/Aw/ Low profile handle
2013AudiA6N/Aw/ Low profile handle
2013AudiA6 QuattroN/Aw/ Low profile handle
2013AudiA7 QuattroN/Aw/ Low profile handle
2013AudiallroadN/Aw/ Low profile handle
2013AudiQ5N/Aw/ Low profile handle
2013AudiQ7N/Aw/ Low profile handle
2013AudiS4N/Aw/ Low profile handle
2013AudiS5N/Aw/ Low profile handle
2013AudiS6N/Aw/ Low profile handle
2013AudiS7N/Aw/ Low profile handle
2013AudiTT QuattroN/Aw/ Low profile handle
2013VolkswagenBeetleN/Aw/ Low profile handle
2013VolkswagenCC2.0LL4N/Aw/ Low profile handle
2013VolkswagenEosN/Aw/ Low profile handle
2013VolkswagenGolfN/Aw/ Low profile handle
2013VolkswagenGTIN/Aw/ Low profile handle
2013VolkswagenJettaN/A
2013VolkswagenJettaN/Aw/ Low profile handle
2013VolkswagenPassatN/Aw/ Low profile handle
2013VolkswagenTouaregN/Aw/ Low profile handle
2012AudiA3N/Aw/ Low profile handle
2012AudiA3 QuattroN/Aw/ Low profile handle
2012AudiA4N/Aw/ Low profile handle
2012AudiA4 QuattroN/Aw/ Low profile handle
2012AudiA5N/Aw/ Low profile handle
2012AudiA5 QuattroN/Aw/ Low profile handle
2012AudiA6N/Aw/ Low profile handle
2012AudiA6 QuattroN/Aw/ Low profile handle
2012AudiA7 QuattroN/Aw/ Low profile handle
2012AudiQ5N/Aw/ Low profile handle
2012AudiQ7N/Aw/ Low profile handle
2012AudiS4N/Aw/ Low profile handle
2012AudiS5N/Aw/ Low profile handle
2012AudiTT QuattroN/Aw/ Low profile handle
2012VolkswagenBeetleN/Aw/ Low profile handle
2012VolkswagenCC2.0LL4N/Aw/ Low profile handle
2012VolkswagenEosN/Aw/ Low profile handle
2012VolkswagenGolfN/Aw/ Low profile handle
2012VolkswagenGTIN/Aw/ Low profile handle
2012VolkswagenJettaN/A
2012VolkswagenJettaN/Aw/ Low profile handle
2012VolkswagenPassatN/Aw/ Low profile handle
2012VolkswagenTouaregN/Aw/ Low profile handle
2011AudiA3N/Aw/ Low profile handle
2011AudiA3 QuattroN/Aw/ Low profile handle
2011AudiA4N/Aw/ Low profile handle
2011AudiA4 QuattroN/Aw/ Low profile handle
2011AudiA5N/Aw/ Low profile handle
2011AudiA5 QuattroN/Aw/ Low profile handle
2011AudiQ5N/Aw/ Low profile handle
2011AudiQ7N/Aw/ Low profile handle
2011AudiS4N/Aw/ Low profile handle
2011AudiS5N/Aw/ Low profile handle
2011AudiTT QuattroN/Aw/ Low profile handle
2011VolkswagenCC2.0LL4N/Aw/ Low profile handle
2011VolkswagenEosN/Aw/ Low profile handle
2011VolkswagenGolfN/Aw/ Low profile handle
2011VolkswagenGTIN/Aw/ Low profile handle
2011VolkswagenJettaN/A
2011VolkswagenJettaN/Aw/ Low profile handle
2011VolkswagenTouaregN/Aw/ Low profile handle
2010AudiA3N/Aw/ Low profile handle
2010AudiA3 QuattroN/Aw/ Low profile handle
2010AudiA4N/Aw/ Low profile handle
2010AudiA4 QuattroN/Aw/ Low profile handle
2010AudiA5N/Aw/ Low profile handle
2010AudiA5 QuattroN/Aw/ Low profile handle
2010AudiQ5N/Aw/ Low profile handle
2010AudiQ73.6LV6N/Aw/ Low profile handle
2010AudiQ73.0LV6N/Aw/ Low profile handle
2010AudiS4N/Aw/ Low profile handle
2010AudiS5N/Aw/ Low profile handle
2010AudiTT QuattroN/Aw/ Low profile handle
2010VolkswagenBeetleN/Aw/ Low profile handle
2010VolkswagenCC2.0LL4N/Aw/ Low profile handle
2010VolkswagenEosN/Aw/ Low profile handle
2010VolkswagenGolfN/Aw/ Low profile handle
2010VolkswagenGTIN/Aw/ Low profile handle
2010VolkswagenJettaN/A
2010VolkswagenJettaN/Aw/ Low profile handle
2010VolkswagenPassat2.0LL4N/Aw/ Low profile handle
2010VolkswagenTouareg3.6LV6N/Aw/ Low profile handle
2010VolkswagenTouaregTDIN/Aw/ Low profile handle
2009AudiA3N/Aw/ Low profile handle
2009AudiA3 QuattroN/Aw/ Low profile handle
2009AudiA4N/Aw/ Low profile handle
2009AudiA4 Quattro2.0LL4N/Aw/ Low profile handle
2009AudiA4 QuattroConvertible3.2LV6N/Aw/ Low profile handle
2009AudiA5 QuattroN/Aw/ Low profile handle
2009AudiQ5N/Aw/ Low profile handle
2009AudiQ73.6LV6N/Aw/ Low profile handle
2009AudiQ73.0LV6N/Aw/ Low profile handle
2009AudiS4N/Aw/ Low profile handle
2009AudiS5N/Aw/ Low profile handle
2009AudiTTN/Aw/ Low profile handle
2009AudiTT Quattro2.0LL4N/Aw/ Low profile handle
2009VolkswagenBeetleN/Aw/ Low profile handle
2009VolkswagenCC2.0LL4N/Aw/ Low profile handle
2009VolkswagenEosN/Aw/ Low profile handle
2009VolkswagenGTIN/Aw/ Low profile handle
2009VolkswagenJettaN/A
2009VolkswagenJettaGASN/Aw/ Low profile handle
2009VolkswagenPassat2.0LL4N/Aw/ Low profile handle
2009VolkswagenTouareg3.6LV6N/Aw/ Low profile handle
2008AudiA3N/Aw/ Low profile handle
2008AudiA3 QuattroN/Aw/ Low profile handle
2008AudiA42.0LL4N/Aw/ Low profile handle
2008AudiA4 Quattro3.2LV6N/Aw/ Low profile handle
2008AudiA4 Quattro2.0LL4N/Aw/ Low profile handle
2008AudiA5 QuattroN/Aw/ Low profile handle
2008AudiRS4N/Aw/ Low profile handle
2008AudiS4N/Aw/ Low profile handle
2008AudiS5N/Aw/ Low profile handle
2008AudiTTN/Aw/ Low profile handle
2008AudiTT QuattroN/Aw/ Low profile handle
2008VolkswagenBeetleN/Aw/ Low profile handle
2008VolkswagenEosN/Aw/ Low profile handle
2008VolkswagenGTIN/Aw/ Low profile handle
2008VolkswagenJettaN/A
2008VolkswagenJettaN/Aw/ Low profile handle
2008VolkswagenPassat2.0LL4N/Aw/ Low profile handle
2008VolkswagenR32N/Aw/ Low profile handle
2008VolkswagenTouareg3.6LV6N/Aw/ Low profile handle
2007AudiA3N/Aw/ Low profile handle
2007AudiA3 QuattroN/Aw/ Low profile handle
2007AudiA42.0LL4N/Aw/ Low profile handle
2007AudiA4 Quattro3.2LV6N/Aw/ Low profile handle
2007AudiA4 Quattro2.0LL4N/Aw/ Low profile handle
2007AudiRS4N/Aw/ Low profile handle
2007AudiS4N/Aw/ Low profile handle
2007VolkswagenBeetleN/Aw/ Low profile handle
2007VolkswagenEosN/Aw/ Low profile handle
2007VolkswagenGTIN/Aw/ Low profile handle
2007VolkswagenJettaN/A
2007VolkswagenJetta2.5LL5N/Aw/ Low profile handle
2007VolkswagenJetta2.0LL4N/Aw/ Low profile handle
2007VolkswagenPassat3.6LV6N/Aw/ Low profile handle
2007VolkswagenPassat2.0LL4N/Aw/ Low profile handle
2007VolkswagenTouareg3.6LV6N/Aw/ Low profile handle
2007VolkswagenTouareg4.2LV8N/Aw/ Low profile handle
2006AudiA3N/Aw/ Low profile handle
2006AudiA3 QuattroN/Aw/ Low profile handle
2006AudiA42.0LL4N/Aw/ Low profile handle
2006AudiA4 Quattro3.2LV6N/Aw/ Low profile handle
2006AudiA4 Quattro2.0LL4N/Aw/ Low profile handle
2006AudiS4N/Aw/ Low profile handle
2006AudiTTN/Aw/ Low profile handle
2006AudiTT QuattroN/Aw/ Low profile handle
2006VolkswagenBeetleN/Aw/ Low profile handle
2006VolkswagenGolfGLN/Aw/ Low profile handle
2006VolkswagenGolfGLSN/Aw/ Low profile handle
2006VolkswagenGolfGLS TDIN/Aw/ Low profile handle
2006VolkswagenGTIN/Aw/ Low profile handle
2006VolkswagenJettaN/A
2006VolkswagenJettaN/Aw/ Low profile handle
2006VolkswagenPassatN/Aw/ Low profile handle
2006VolkswagenTouareg3.2LV6N/Aw/ Low profile handle
2006VolkswagenTouareg4.2LV8N/Aw/ Low profile handle
2005AudiA42.0LL4N/Aw/ Low profile handle; Low profile version
2005AudiA4 Quattro3.2LV6N/Aw/ Low profile handle
2005AudiA4 Quattro2.0LL4N/Aw/ Low profile handle
2005AudiAllroad QuattroN/Aw/ Low profile handle
2005AudiS4AvantN/Aw/ Low profile handle
2005AudiS4BaseN/Aw/ Low profile handle
2005AudiTTN/Aw/ Low profile handle
2005AudiTT QuattroN/Aw/ Low profile handle
2005VolkswagenBeetleN/Aw/ Low profile handle
2005VolkswagenGolfGLN/Aw/ Low profile handle
2005VolkswagenGolfGLSN/Aw/ Low profile handle
2005VolkswagenGolfGTI 1.8TN/Aw/ Low profile handle
2005VolkswagenGolfGTI VR6N/Aw/ Low profile handle
2005VolkswagenGolfTDIN/Aw/ Low profile handle
2005VolkswagenJettaN/A
2005VolkswagenJettaN/Aw/ Low profile handle
2005VolkswagenPassatGLN/Aw/ Low profile handle
2005VolkswagenPassatGL TDIN/Aw/ Low profile handle
2005VolkswagenPassatGLSN/Aw/ Low profile handle
2005VolkswagenPassatGLS 4 Motion2.8LV6N/Aw/ Low profile handle
2005VolkswagenPassatGLS 4 Motion1.8LL4N/Aw/ Low profile handle
2005VolkswagenPassatGLXN/Aw/ Low profile handle
2005VolkswagenPassatGLX 4 MotionN/Aw/ Low profile handle
2005VolkswagenTouaregN/Aw/ Low profile handle
2004AudiA6 Quattro4.2LV8N/Aw/ Low profile handle
2004AudiAllroad QuattroN/Aw/ Low profile handle
2004AudiTTN/Aw/ Low profile handle
2004AudiTT QuattroN/Aw/ Low profile handle
2004VolkswagenBeetleTurbo SN/Aw/ Low profile handle
2004VolkswagenGolfN/Aw/ Low profile handle
2004VolkswagenJettaN/A
2004VolkswagenJettaN/Aw/ Low profile handle
2004VolkswagenPassatGLN/Aw/ Low profile handle
2004VolkswagenPassatGLSN/Aw/ Low profile handle
2004VolkswagenPassatGLS 4 MotionN/Aw/ Low profile handle
2004VolkswagenPassatGLXN/Aw/ Low profile handle
2004VolkswagenPassatGLX 4 MotionN/Aw/ Low profile handle
2004VolkswagenTouareg3.2LV6N/Aw/ Low profile handle
2004VolkswagenTouareg4.2LV8N/Aw/ Low profile handle
2003AudiA6 Quattro4.2LV8N/Aw/ Low profile handle
2003AudiAllroad Quattro2.7LV6N/Aw/ Low profile handle
2003AudiRS6N/Aw/ Low profile handle
2003AudiS6N/Aw/ Low profile handle
2003AudiTTN/Aw/ Low profile handle
2003AudiTT QuattroN/Aw/ Low profile handle
2003VolkswagenBeetleTurbo SN/Aw/ Low profile handle
2003VolkswagenGolfN/Aw/ Low profile handle
2003VolkswagenJettaN/A
2003VolkswagenJetta2.0LL4N/Aw/ Low profile handle
2003VolkswagenJetta1.9LL4N/Aw/ Low profile handle
2003VolkswagenJetta1.8LL4N/Aw/ Low profile handle
2003VolkswagenPassatGLN/Aw/ Low profile handle
2003VolkswagenPassatGLSN/Aw/ Low profile handle
2003VolkswagenPassatGLXN/Aw/ Low profile handle
2003VolkswagenPassatGLX 4 MotionN/Aw/ Low profile handle
2002AudiA41.8LL4N/Aw/ Low profile handle; Low profile version
2002AudiA4 Quattro1.8LL4N/Aw/ Low profile handle
2002AudiA6 Quattro4.2LV8N/Aw/ Low profile handle
2002AudiAllroad QuattroN/Aw/ Low profile handle
2002AudiS6N/Aw/ Low profile handle
2002AudiTTN/Aw/ Low profile handle
2002AudiTT QuattroN/Aw/ Low profile handle
2002VolkswagenBeetleTurbo SN/Aw/ Low profile handle
2002VolkswagenGolfGLN/Aw/ Low profile handle
2002VolkswagenGolfGLSN/Aw/ Low profile handle
2002VolkswagenGolfGTI 1.8TN/Aw/ Low profile handle
2002VolkswagenGolfGTI 337N/Aw/ Low profile handle
2002VolkswagenGolfGTI VR6N/Aw/ Low profile handle
2002VolkswagenJettaN/A
2002VolkswagenJetta2.0LL4N/Aw/ Low profile handle
2002VolkswagenJetta1.9LL4N/Aw/ Low profile handle
2002VolkswagenJetta1.8LL4N/Aw/ Low profile handle
2002VolkswagenJettaGLIN/Aw/ Low profile handle
2002VolkswagenPassatGLSN/Aw/ Low profile handle
2002VolkswagenPassatGLS 4 MotionN/Aw/ Low profile handle
2002VolkswagenPassatGLXN/Aw/ Low profile handle
2002VolkswagenPassatGLX 4 MotionN/Aw/ Low profile handle
2001AudiA4N/Aw/ Low profile handle
2001AudiA4 QuattroN/Aw/ Low profile handle
2001AudiA6N/Aw/ Low profile handle
2001AudiA6 QuattroAvantN/Aw/ Low profile handle
2001AudiA6 QuattroBase2.8LV6N/Aw/ Low profile handle
2001AudiAllroad QuattroN/Aw/ Low profile handle
2001AudiTTN/Aw/ Low profile handle
2001AudiTT QuattroN/Aw/ Low profile handle
2001VolkswagenBeetleN/Aw/ Low profile handle
2001VolkswagenGolfN/Aw/ Low profile handle
2001VolkswagenJettaN/A
2001VolkswagenJetta2.0LL4N/Aw/ Low profile handle
2001VolkswagenJetta1.9LL4N/Aw/ Low profile handle
2001VolkswagenJetta1.8LL4N/Aw/ Low profile handle
2001VolkswagenPassatN/Aw/ Low profile handle
2000AudiA4N/Aw/ Low profile handle
2000AudiA4 QuattroN/Aw/ Low profile handle
2000AudiA6N/Aw/ Low profile handle
2000AudiA6 QuattroAvantN/Aw/ Low profile handle
2000AudiA6 QuattroBase2.8LV6N/Aw/ Low profile handle
2000AudiTTN/Aw/ Low profile handle
2000AudiTT QuattroN/Aw/ Low profile handle
2000VolkswagenBeetleN/Aw/ Low profile handle
2000VolkswagenGolfGLN/Aw/ Low profile handle
2000VolkswagenGolfGLS2.0LL4N/Aw/ Low profile handle
2000VolkswagenGolfGLS1.9LL4N/Aw/ Low profile handle
2000VolkswagenGolfGLS1.8LL4N/Aw/ Low profile handle
2000VolkswagenGolfGTI GLSN/Aw/ Low profile handle
2000VolkswagenGolfGTI GLXN/Aw/ Low profile handle
2000VolkswagenJettaN/A
2000VolkswagenJetta2.0LL4N/Aw/ Low profile handle
2000VolkswagenJetta1.9LL4N/Aw/ Low profile handle
2000VolkswagenJetta1.8LL4N/Aw/ Low profile handle
2000VolkswagenPassatN/Aw/ Low profile handle
1999AudiA4N/Aw/ Low profile handle
1999AudiA4 QuattroN/Aw/ Low profile handle
1999AudiA6N/Aw/ Low profile handle
1999AudiA6 QuattroN/Aw/ Low profile handle
1999VolkswagenBeetleN/Aw/ Low profile handle
1999VolkswagenGolfGL2.0LL4N/Aw/ Low profile handle
1999VolkswagenGolfGLSN/Aw/ Low profile handle
1999VolkswagenGolfGTIN/Aw/ Low profile handle
1999VolkswagenGolfTDIN/Aw/ Low profile handle
1999VolkswagenJettaN/Aw/ Low profile handle
1999VolkswagenJetta2.0LL4N/Aw/ Low profile handle
1999VolkswagenJetta1.9LL4N/Aw/ Low profile handle
1999VolkswagenJettaTDIN/Aw/ Low profile handle
1999VolkswagenPassatN/Aw/ Low profile handle
1998AudiA4N/Aw/ Low profile handle
1998AudiA4 QuattroN/Aw/ Low profile handle
1998AudiA6N/Aw/ Low profile handle
1998AudiA6 QuattroN/Aw/ Low profile handle
1998VolkswagenBeetleN/Aw/ Low profile handle
1998VolkswagenJettaTDIN/Aw/ Low profile handle
1998VolkswagenPassatN/Aw/ Low profile handle
1997AudiA4N/Aw/ Low profile handle
1997AudiA4 QuattroN/Aw/ Low profile handle
1997VolkswagenJettaTDIN/Aw/ Low profile handle
1996AudiA4N/Aw/ Low profile handle; Low profile version
1996AudiA4 QuattroN/Aw/ Low profile handle

* 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:

3B0 121 3213B012132154202603-030603-350URO-008068V10-0490Z 49036

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