2011-2018 Audi / Porsche Coolant Reservoir / Tank / Bottle 8K0121403Q

OEM Part #: 8K0-121-403-Q (8K0121403Q)

$35.49
Used
Donor2015 Audi Q5 · 2.0L
SKU: 702818 · 30-Day Returns
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Coolant Reservoir / Tank / Bottle 8K0121403Q — Used (SKU 702818)
Genuine OEM Used SKU: 702818 Donor Vehicle: 2015 Audi Q5 · 2.0L 3 photos
$35.49
30-Day Returns
Coolant Reservoir / Tank / Bottle 8K0121403Q — Used (SKU 694002)
Genuine OEM Used SKU: 694002 Donor Vehicle: 2014 Audi ALLROAD · 2.0L 3 photos
$35.49
30-Day Returns
  • Genuine OEM — real photos
  • 30-day returns on eligible parts
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A used Audi coolant reservoir / tank / bottle, OEM part number 8K0121403Q, also superseding 8K0121403H, 8K0121403G, and 8K0121403D. This expansion tank stores and supplies coolant to the engine, maintaining proper cooling system pressure. A cracked or leaking reservoir can cause low coolant levels, leading to overheating. It fits Audi A4, A5, Q5, and Porsche Macan models with 1.8L or 2.0L turbocharged and hybrid engines.

Specifications

Specifications for Coolant Reservoir / Tank / Bottle 8K0121403Q
Fits Vehicle ModelA4, A5, allroad, Macan, Q5
Fits Vehicle MakeAudi, Porsche
OEM Part No8K0-121-403-Q (8K0121403Q)
Compatible OEM Part No 8K0-121-403-H, 8K0-121-403-G, 8K0-121-403-D
CategoryRadiator / Coolant

Compatible Vehicles

Fits 28 vehicle configurations across 2 makes, 2011-2018.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Audi

  • A4 2012-2016 · 11 variants 3 with notes
  • A5 2013-2016 · 4 variants
  • Q5 2011-2017 · 7 variants 2 with notes
  • allroad 2013-2016 · 4 variants

Porsche

  • Macan 2017-2018 · 2 variants 2 with notes
View all 28 vehicle configurations — 7 with fitment notes
Full vehicle fitment list for Coolant Reservoir / Tank / Bottle 8K0121403Q
Year Make Model Trim Engine Note
2016 Audi allroad Wagon 2.0L l4 Turbo
2015 Audi allroad Wagon 2.0L l4 Turbo
2014 Audi allroad Wagon 2.0L l4 Turbo
2013 Audi allroad Wagon 2.0L l4 Turbo
2017 Porsche Macan SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA
2018 Porsche Macan SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA
2016 Audi A4 Quattro Sedan 2.0L l4 Turbo
2016 Audi A4 Sedan 2.0L l4 Turbo
2016 Audi Q5 SUV 2.0L l4 Turbo
2016 Audi A5 Quattro Coupe 2.0L l4 Turbo
2017 Audi Q5 SUV 2.0L l4 Turbo
2011 Audi Q5 SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CAEB, CAGA, CAGB, CAHA, CAHB, CDNB, CDNC, CGLA, CGLB, CJCB, CMGA
2012 Audi A4 Sedan 2.0L l4 Turbo For Vehicles with Production Date After 01/09/12
2012 Audi A4 Quattro Wagon 2.0L l4 Turbo For Vehicles with Production Date After 01/09/12
2012 Audi Q5 SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CAEB, CAGA, CAGB, CAHA, CAHB, CDNB, CDNC, CGLA, CGLB, CJCB, CMGA
2012 Audi A4 Quattro Sedan 2.0L l4 Turbo For Vehicles with Production Date After 01/09/12
2014 Audi A5 Quattro Coupe 2.0L l4 Turbo
2014 Audi Q5 SUV 2.0L l4 Turbo
2014 Audi A4 Quattro Sedan 2.0L l4 Turbo
2013 Audi Q5 SUV 2.0L l4 Turbo
2013 Audi A4 Quattro Sedan 2.0L l4 Turbo
2013 Audi A4 Sedan 2.0L l4 Turbo
2013 Audi A5 Quattro Coupe 2.0L l4 Turbo
2014 Audi A4 Sedan 2.0L l4 Turbo
2015 Audi A4 Quattro Sedan 2.0L l4 Turbo
2015 Audi Q5 SUV 2.0L l4 Turbo
2015 Audi A5 Quattro Coupe 2.0L l4 Turbo
2015 Audi A4 Sedan 2.0L l4 Turbo

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