AWE Tuning
VMR Wheels
Coolant Tank Cap
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3B0121321 COVER

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Cap maintains the pressure in your cooling system.

  • $22.15
Retail Price: $27.00 , Discount $4.85
  • 18% off
  • Shipping info

    We deliver worldwide: UPS, USPS, DHL - or pickup your order in Westlake, Ohio

  • Payment methods


  • Return Policy

    We accept returns; please see the Returns and Refunds Page for more info.

  • Weight
    0.1 lbs
  • SKU

This cap not only keeps coolant in your engine where it should be but also maintains the higher
pressure required in your vehicles cooling system.  This cap wears out over time due to exposure
to high temperatures under the hood and can become ineffective in maintaining pressure.

This clean looking blue cap is a great part for any VW/Audi engine bay.


Make Model Year Engine
Audi A3 8P (2006-2013) 2.0T FSI
Audi A3 8P (2006-2013) FrontTrack 2.0T TSI
Audi A3 8P (2006-2013) Quattro 2.0T TSI
Audi A4 B7 (2005-2008) 3.2L V6
Audi A4 B7 (2005-2008) FrontTrack 2.0T FSI
Audi A4 B7 (2005-2008) Quattro 2.0T FSI
Audi A4 B8/B8.5 (2009-2016) 3.2L V6
Audi A4 B8/B8.5 (2009-2016) FrontTrack 2.0T TFSI
Audi A4 B8/B8.5 (2009-2016) Quattro 2.0T TFSI
Audi A4 B5 (1996-2001) FrontTrack 1.8T
Audi A4 B5 (1996-2001) FrontTrack V6 12V
Audi A4 B5 (1996-2001) FrontTrack V6 30V
Audi A4 B5 (1996-2001) Quattro 1.8T
Audi A4 B5 (1996-2001) Quattro V6 12V
Audi A4 B5 (1996-2001) Quattro V6 30V
Audi A4 B6 (2002-2005) FrontTrack 1.8T
Audi A4 B6 (2002-2005) FrontTrack 3.0L V6
Audi A4 B6 (2002-2005) Quattro 1.8T
Audi A4 B6 (2002-2005) Quattro 3.0L V6
Audi A5 B8/B8.5 (2008-2017) 3.2L V6
Audi A5 B8/B8.5 (2008-2017) FrontTrack 2.0T TFSI
Audi A5 B8/B8.5 (2008-2017) Quattro 2.0T TFSI
Audi A6 C5 (1998-2004) 4.2L V8
Audi A6 C5 (1998-2004) 2.7T V6
Audi A6 C5 (1998-2004) FrontTrack 2.8L V6
Audi A6 C5 (1998-2004) FrontTrack 3.0L V6
Audi A6 C5 (1998-2004) Quattro 2.8L V6
Audi A6 C5 (1998-2004) Quattro 3.0L V6
Audi Allroad (2001-2005) 2.7T V6
Audi Allroad (2001-2005) 4.2L V8
Audi RS4 B7 (2007-2008) 4.2L V8
Audi S4 B5 (2000-2002) 2.7T V6
Audi S4 B6 (2003-2004) 4.2L V8
Audi S4 B7 (2005-2009) 4.2L V8
Audi S4 B8/B8.5 (2010-2016) 3.0 TFSI
Audi S6 C5 (2002-2003) 4.2L V8
Audi TT MKI (V6) 3.2L V6
Audi TT MKI (V6) Quattro 225
Audi TT MKII (2008-2015) 3.2L V6
Audi TT MKII (2008-2015) FrontTrack 2.0T
Audi TT MKII (2008-2015) Quattro 2.0T TFSI
Audi TT MKI (1998-2007) FrontTrack 180
Audi TT MKI (1998-2007) Quattro 180
Audi TTS MKII (2009-2015) 2.0T FSI
Volkswagen CC MK1 (2009-2017) 2.0T TSI
Volkswagen CC MK1 (2009-2017) 4 Motion 3.6L V6
Volkswagen CC MK1 (2009-2017) FWD 3.6L V6
Volkswagen EOS Gen1 (2007-2014) FSI
Volkswagen EOS Gen1 (2007-2014) TSI
Volkswagen EOS Gen1 (2007-2014) 3.2L
Volkswagen Golf/GTI MKV (2006-2009) 2.0T FSI
Volkswagen Golf/GTI MKV (2006-2009) 2.0T TSI
Volkswagen Golf/GTI MKVI (2010-2014) 2.0T TSI
Volkswagen Golf/GTI MKVI (2010-2014) 2.5L
Volkswagen Jetta MKIV (1999.5-2005) TDI
Volkswagen Jetta MKIV (1999.5-2005) 1.8T
Volkswagen Jetta MKIV (1999.5-2005) 2.0L
Volkswagen Jetta MKIV (1999.5-2005) VR6
Volkswagen Jetta MKIV (1999.5-2005) ALH TDI
Volkswagen Jetta MKIV (1999.5-2005) BEW TDI
Volkswagen Jetta MKV (2005.5-2010) 2.0T
Volkswagen Jetta MKV (2005.5-2010) 2.5L
Volkswagen Jetta MKV (2005.5-2010) TDI
Volkswagen Jetta MKV (2005.5-2010) TDI 2.0L
Volkswagen Jetta MKV (2005.5-2010) 2.0T FSI
Volkswagen Jetta MKV (2005.5-2010) 2.0T TSI
Volkswagen Jetta MKVI (2011-2018) 1.8T TSI
Volkswagen Jetta MKVI (2011-2018) 2.0L
Volkswagen Jetta MKVI (2011-2018) 2.0T TSI
Volkswagen Jetta MKVI (2011-2018) 2.0T TSI Gen 3 (2013.5+)
Volkswagen Jetta MKVI (2011-2018) 2.5L
Volkswagen Passat B6 (2006-2011) 2.0T
Volkswagen Passat B6 (2006-2011) 3.6L V6
Volkswagen Passat B5 (1998-2001) 1.8T
Volkswagen Passat B5 (1998-2001) V6
Volkswagen Passat B5.5 (2002-2004) 1.8T
Volkswagen Passat B5.5 (2002-2004) TDI
Volkswagen Passat B5.5 (2002-2004) V6
Volkswagen Passat B5.5 (2002-2004) W8
Volkswagen Passat B7 (2012-Present) 2.5L
Volkswagen Rabbit MKV (2006-2009) 2.5L
Volkswagen Tiguan MKI (2009-2017) 4 Motion 2.0T
Volkswagen Tiguan MKI (2009-2017) 2.0T TSI
Volkswagen Touareg Gen1 (2004-2007) V10 TDI
Volkswagen Touareg Gen1 (2004-2007) V8
Volkswagen Touareg Touareg 2 (2008-2009) 3.6L VR6
Volkswagen Touareg Touareg 2 (2008-2009) 4.2L V8
Volkswagen Touareg Touareg 2 (2008-2009) V10 TDI
Volkswagen Touareg Touareg 2 (2008-2009) V6 TDI
Volkswagen .:R32 MKIV (2004) 3.2L V6
Volkswagen .:R32 MKV (2008) 3.2L V6
Volkswagen Beetle Gen 1 (1998-2012) 1.8T
Volkswagen Beetle Gen 1 (1998-2012) 2.0L
Volkswagen Beetle Gen 1 (1998-2012) 2.5L
Volkswagen Beetle Gen 1 (1998-2012) ALH TDI
Volkswagen Beetle Gen 1 (1998-2012) BEW TDI
Volkswagen Beetle Gen 2 (2013-Present) 2.0T TSI
Volkswagen Beetle Gen 2 (2013-Present) 2.5L
Volkswagen Golf R MKVI (2012-2013) 2.0T FSI
  • Manufacturer
    Genuine VW / Audi
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Most parts are available for local pick-up with no shipping or handling charge. Please select the in-store pickup option during checkout. Once we receive your order you will be contacted to schedule your pick-up.

Once your order has been shipped, and if the method of shipping has been assigned a tracking number you will be notified of the number. Please note that carriers such as UPS may not update the tracking number status until late in the evening when the daily pickups have been recorded.

In the event your order arrives and an item is damaged, notify HS Tuning within 5 business days after receiving shipment. Make sure to not discard the box(s), packing materials or broken/damaged product(s). If this occasion arises, we require that you obtain a damage claim number from UPS by calling 1-800-742-5877. During the call you will need to supply them with the information from your shipping label. After obtaining a claim number, contact HS Tuning. If a part is missing from your order, you must contact HS Tuning by either by phone at 216-577-7171 or email at This e-mail address is being protected from spambots. You need JavaScript enabled to view it within 5 business days of receiving your shipment. After 5 business days have passed, HS Tuning will no longer be held responsible.

We accept the following payment methods:

Returns, Refunds, Warranty

Returns will not be accepted after 30 days of purchase, and a 15% restocking fee applies to all orders that are not a result of an error made by HS Tuning. Returns will be refused if the part is not:
- In the original packaging and undamaged.
- Product has not been installed.
- Complete with all parts, manuals and print material.

Please note the following parts are not returnable:
- Electrical components
- ECU Software
- Repairs Manuals
- Tools
- Wheels and Tires
- Hand fabricated and custom parts
- All parts identified as special order

Before any item is returned, HS Tuning requires an RMA (Return Merchandise Authorization) number for all returns. RMA numbers can be issued by phone at 216-577-7171 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it

HS Tuning
Attn: Returns Department
30205 Clemens Road Unit A
Westlake, OH 44145

Your RMA number must be visible on the outside of the packaging in order for your return to be processed properly.

Product Warranty:

HS Tuning offers only quality products to its customers. If your part fails due to defects in workmanship or materials within the first year of ownership, contact HS Tuning and provide us with a copy of your original invoice as proof of purchase. HS Tuning will not refund money, but will work with you to replace or warranty parts. Either HS Tuning or the product manufacturer will test or inspect the product before a warranty claim adjustment is finalized. Any product that fails due to misuse, neglect, unintended application or improper installation will not be covered under any warranty. HS Tuning is not liable for consequential and incidental damages and/or costs incurred of any kind, including those caused by products sold by HS Tuning.

In addition to the parts listed above that are non-returnable, HS Tuning cannot offer any full warranty coverage on wearable mechanical items and electrical components.