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Genuine OEM & performance parts — ships to United States

Product overview

Genuine OEM Audi Coolant Expansion Tank Cap, part number 3B0121321. This blue plastic cap is designed to seal the coolant expansion tank, also known as the coolant balancing container, within the engine cooling system. It plays a crucial role in maintaining the correct pressure within the cooling system, which is essential for efficient engine operation and preventing coolant boil-over. Weighing 0.0566 kg, it measures 0.08m x 0.08m x 0.04m. Using a genuine OEM cap ensures the correct pressure relief valve calibration and material integrity, vital for reliable cooling system performance and preventing coolant loss.

Technical details

Category
Engine Cooling
Country of origin
Austria
Customs (HS) code
87089997
Manufacturer
Audi
Product Type
Genuine new auto parts
Shipping size (L × W × H)
8 × 8 × 4 cm
Shipping weight
0.06 kg

Parts diagram & fitment

258 vehicles

End Cap — locate 3B0121321 Audi Coolant Expansion Tank Cap | Genuine OEM in the official exploded view and explore the surrounding assembly.

Parts in this assembly(20)

Diagrams & fitment data powered by oemdiagrams.com

3B0121321 Audi Coolant Expansion Tank Cap | Genuine OEM is fitted on: transport. multivan 2019-2024; caravelle 2019-2024; Single-cab transp. 2019-2024; Amarok twin cab 2022-; LT, LT 4X4 1996-2003; Jetta "USA"99>01 1998-2001; New Beetle 1998-2001; Passat/4Motion/W8 2000-2002; PASSAT 00> 2000-; Phideon 2016-2023; POLO 2001-2005; Jetta USA 2001-2005; New Beetle 2001-2005; POLO "CN"02>06 2002-2006; MARINE-MOTOR 02> 2002-; New Beetle Cabrio. 2003-2005; POLO-BRASIL 2002-2006; Golf "BR.","USA"03>07 2002-2007; POLO LIM.(SEDAN) "BR" 2002-2006; 1J0 platform; 3B0 platform; FOX 04> 2003-; FOX M.05> 2005-; POLO HATCH "BR."07> 2006-; POLO SEDAN "BR."07> 2006-; Golf Brasil "BR."08> 2007-; 5U0 platform; 377 platform; Crossfox 2009-2014; saveiro 2009-2011; saveiro 2009-; parati 2010-; PASSAT/4MOTION/W8 2002-2005; TOURAN 2003-2005; TRANSPORTER 2003-2005; POLO CLASSIC "CN"03>06 2003-2006; GOLF 2003-2005; DIES.-IND.-MOT.1,9>2,0 08> 2007-; 06A platform; LT, LT 4X4 2003-2006; CADDY 2004-; TOURAN (SVW) "CN"04> 2004-; Jetta "USA"05> 2005-; CAMPMOBILE(T5) 2004-2006; GOLF PLUS 05> 2005-; Passat/4Motion 2005-2007; POLO 2005-; JETTA 06> 2005-; Jetta City "MEX"05>07 2006-2007; New Beetle 06> 2005-; New Beetle Cabrio. 06> 2005-; Golf/Rabbit 2005-2007; TOURAN 2005-2006; TRANSPORTER/4MOTION 06 2005-2006; TRANSPORTER 06 2005-2006; EOS-Cabriolet-Coupe 2006-; CRAFTER 06> 2006-; PASSAT LINGYU "CN."06> 2005-; POLO CLASSIC "ZA"05> 2005-; SURAN (FOX MPV) "RA."06> 2006-; Spacefox 2010-2014; Voyage 2011-; saveiro 2011-2013; Polo 2011-2014; polo sedan 2011-2014; Gol 1.6 2012-; Voyage 2012-; saveiro 2013-; Crossfox 2014-2021; Gol 1.6 2015-2023; Voyage 2016-2023; saveiro 2016-2017; E-Crafter 35 2018-2024; JETTA 06> 2006-; POLO JIN QIN "CN"06> 2006-; POLO JIN QV "CN"06> 2006-; TRANSPORTER/4MOTION 07 2006-2007; TRANSPORTER OFFEN (7J) 07 2006-2007; CAMPMOBIL (T5) 07 2006-2007; GOLF VARIANT 07> 2007-; TOURAN 2006-; Jetta Vagon 08> 2008-; POLO CLASSIC (AUS) "CN"03>06 2003-2006; Jetta City "Mex"08> 2007-; Golf/Rabbit 08> 2007-; GOLF PLUS 08> 2007-; Passat/4Motion 08 2007-; TRANSPORTER GESCHL. 08 2007-; TRANSPORTER OFFEN 08 2007-; CAMPMOBIL-T5 08 2007-; Lavida 2008-2013; Passat CC 2008-2012; golf 2.0 2008-2011; Golf Plus 1.6 2009-2011; Scirocco 2.0 2008-2014; caddy panel van 2008-2010; EOS 2.0 2008-2010; passat estate 2008-2011; Polo 2008-2009; Touran 1.9 2008-2010; transp. caravelle 2008-2009; transp. dropside 2008-2009; California Camper 2008-2009; jetta 2008-2011; Polo 2009-2012; Polo 2009-2014; Polo 2010-2015; transp. caravelle 2009-2011; transp. dropside 2009-2011; California Camper 2009-2011; Amarok twin cab 2009-2012; golf estate 2009-2013; jetta variant 2009-2014; Tiguan 2009-2019; Caddy Maxi Kombi 2010-2015; New Passat 2011-2015; jetta 2010-2014; touareg 2010-2012; Touran 2.0 2010-2015; Polo Vivo 2010-2014; Passat saloon 2010-2015; Eos BlueMotion 2010-2015; New Polo (SVW) 2010-2019; New Passat 2011-2019; new beetle 2011-2016; new beetle cabriolet 2011-2016; Golf Cabriolet 2011-2016; Crafter 35 panel 2011-2016; Golf 2011-2013; Golf Plus 2011-2014; transp. caravelle 2011-2015; transp. dropside 2011-2015; California Camper 2011-2015; Passat CC 2011-2016; Lavida 2012-2021; Polo 2012-2014; touareg 2012-2014; Amarok twin cab 2012-2016; santana 2012-2023; Lavida 2013-2015; Polo 1.6 2013-2022; Polo 1.4 BlueMotion 2014-2017; jetta 2013-2014; Jetta 1.4 2013-2015; Golf 1.4 BlueMotion 2014-2017; Polo Vivo 2014-2017; Scirocco 2.0 2014-2017; Touareg BlueMotion 2014-2018; jetta 2014-2017; Polo 2014-2022; Golf Estate 1.4 2014-2017; Spacefox 2014-2019; Beetle 2016-2019; new beetle cabriolet 2016-2019; MAN TGE 55 2016-2021; MAN TGE 35 2016-2021; Jetta 1.6 2014-2018; Jetta 1.4 2014-2017; caravelle 2015-2019; Single-cab transp. 2015-2019; Gran Santana 2015-2019; caddy kombi 2015-2020; New Passat 2015-2022; California Camper 2015-2019; Polo 1.6 2015-2020; New Lavida 2015-2022; Gran Lavida 2015-2018; jetta 2.0 2015-2015; Ameo 1,0 2016-2020; Amarok twin cab 2016-2022; 2X2 platform; TOLEDO/LEON/LEON-4 1998-2001; CORDOBA/VARIO 1999-2002; IBIZA 1999-2002; IBIZA 2001-2005; TOLEDO/LEON/LEON-4 2001-2006; CORDOBA/SE241 2002-2005; ALTEA 2004-2006; TOLEDO 05> 2004-; LEON 06> 2005-; IBIZA 06> 2005-; CORDOBA 06> 2005-; ALTEA 07> 2006-; Ibiza Reference 2008-2011; Exeo ST Reference 2008-2011; Leon Stylance 2010-2012; Altea XL Reference 2010-2013; Ibiza Reference 2011-2012; Toledo Reference 2012-2015; Ibiza Reference 2012-2012; Altea XL Reference 2013-2013; Ibiza Stylance 2015-; Toledo Reference 2015-2019; OCTAVIA/COMBI/4X4 1996-2000; FABIA/COMBI 1999-2004; OCTAVIA/COMBI/4X4 01> 2000-; SUPERB 02> 2001-; OCTAVIA/COMBI/4X4 04> 2004-; FABIA/COMBI 05> 2004-; ROOMSTER 06> 2006-; FABIA/COMBI NF 07> 2006-; OCTAVIA "CN."07> 2007-; superb comfort 2008-2013; Fabia Jingrui 2008-2014; octavia ambiente 2008-2013; Yeti 2009-2013; Superb Ambition 2009-2015; Roomster 2010-2015; Fabia Ambiente 2009-2013; Rapid Ambition 2011-2021; Rapid 2012-2022; Octavia 2012-2017; Rapid 2012-2023; superb 2013-2015; Yeti 2013-2017; Rapid Spaceback 2014-2022; fabia 2014-2022; Octavia 2017-2020; Fabia NF HB 2015-2018; Audi TT Coupe/Roadster 2002-2006; AUDI A3 "BR."M.06> 2005-2006; Audi A3/S3/quattro 2005-2007; Audi A4/S4/Av./qu. 05> 2005-; Audi RS4 qu. 07> 2006-; Audi A4/S4 Cabrio./qu. 07> 2006-; Audi RS4 Cabrio qu. 08> 2007-; Audi TT Coupe/Roadster 08> 2007-; Audi A5/S5 Coupe 08> 2007-; AUDI A4 08> 2007-; Audi A3/S3/Sportb./qu. 08 2007-; Audi A3 Cab. 2.0 TDI 2007-2013; Audi A3 Sportback 2008-2013; Audi Q5 qu. 2.0 TDI 2008-2012; Audi A5 Cabrio 2.0 2008-2012; Audi A4 Av. Allroad 2008-2016; Audi TTRS Plus Coupe 2009-2014; Audi TTS Coupe 2.0 2010-2014; Audi A1 Sportback 2010-2015; Audi A7 Sportback 2010-2015; audi a6 2.0 tdi 2010-2015; Audi RS3 Sportback 2011-2012; Audi A5 Sportback 2011-2017; Audi A5 Cabrio 2.0 2011-2017; audi a4 av. 2.0 tdi 2011-2015; Audi A6 Av. qu. 3.0 2012-2018; Audi A3 Sportback 2012-2016; Audi Q5 qu. 2.0 TDI 2012-2017; Audi RS6 Avant 2013-2018; Audi RS7 Sportback 2013-2018; Audi A3 Cab. 1.4 2013-2016; Audi A7 Sportback 2014-2018; Audi A1 Sportback 2014-2018; audi a6 qu. 3.0 tdi 2014-2018.