2011-2018 Audi / Porsche Coolant Reservoir / Tank / Bottle 8K0121403H

OEM Part #: 8K0-121-403-H (8K0121403H)

$28.49
Used
Donor2012 Audi Q5 · 2.0L
SKU: 658621 · 30-Day Returns
✓ Free Same Day Shipping on orders by noon CT
Only 2 in stock — no guaranteed restock
Coolant Reservoir / Tank / Bottle 8K0121403H — Used (SKU 658621)
Genuine OEM Used SKU: 658621 Donor Vehicle: 2012 Audi Q5 · 2.0L 3 photos
$28.49
30-Day Returns
Coolant Reservoir / Tank / Bottle 8K0121403H — Used (SKU 689387)
Genuine OEM Used SKU: 689387 Donor Vehicle: 2012 Audi A5 QUATTRO · 2.0L 3 photos
$29.49
30-Day Returns
  • Genuine OEM — real photos
  • 30-day returns on eligible parts
  • eBay Top Rated · 100,000+ positive ratings
  • Ships from our own indoor warehouse

This used OEM Audi Coolant Reservoir with OEM number 8K0121403H (also supersedes 8K0121403G, 8K0121403D, 8K0121403Q) serves as a coolant tank or bottle for 1.8L and 2.0L turbo engines in select Audis and the Porsche Macan. Over time, these reservoirs can develop hairline cracks at the seams or neck, causing slow coolant loss and potential overheating. Replace a leaking or brittle unit to restore proper expansion and recovery of the cooling system.

Specifications

Specifications for Coolant Reservoir / Tank / Bottle 8K0121403H
Fits Vehicle ModelA4, A5, allroad, Macan, Q5
Fits Vehicle MakeAudi, Porsche
OEM Part No8K0-121-403-H (8K0121403H)
Compatible OEM Part No 8K0-121-403-G, 8K0-121-403-D, 8K0-121-403-Q
CategoryRadiator / Coolant

Compatible Vehicles

Fits 38 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 2011-2016 · 14 variants
  • A5 2013-2017 · 11 variants
  • Q5 2011-2017 · 7 variants 2 with notes
  • allroad 2013-2016 · 4 variants 4 with notes

Porsche

  • Macan 2017-2018 · 2 variants 2 with notes
View all 38 vehicle configurations — 8 with fitment notes
Full vehicle fitment list for Coolant Reservoir / Tank / Bottle 8K0121403H
Year Make Model Trim Engine Note
2018 Porsche Macan SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA
2017 Porsche Macan SUV 2.0L l4 Turbo For Vehicles with Engine Code(s) CNC, CNCC, CYN, CYNA, CYNB, CYP, CYPA
2015 Audi A4 Quattro Sedan 2.0L l4 Turbo
2015 Audi A4 Sedan 2.0L l4 Turbo
2015 Audi Q5 SUV 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
2014 Audi A4 Sedan 2.0L l4 Turbo
2014 Audi A4 Quattro Sedan 2.0L l4 Turbo
2014 Audi Q5 SUV 2.0L l4 Turbo
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
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
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
2017 Audi Q5 SUV 2.0L l4 Turbo
2016 Audi allroad Wagon 2.0L l4 Turbo For Vehicles with Engine Code(s) CAGA, CAGB, CAHA, CAHB, CDNC
2015 Audi allroad Wagon 2.0L l4 Turbo For Vehicles with Engine Code(s) CAGA, CAGB, CAHA, CAHB, CDNC
2014 Audi allroad Wagon 2.0L l4 Turbo For Vehicles with Engine Code(s) CAGA, CAGB, CAHA, CAHB, CDNC
2013 Audi allroad Wagon 2.0L l4 Turbo For Vehicles with Engine Code(s) CAGA, CAGB, CAHA, CAHB, CDNC
2016 Audi A5 Quattro Convertible 2.0L l4 Turbo
2016 Audi A5 Quattro Coupe 2.0L l4 Turbo
2012 Audi A4 Quattro Wagon 2.0L l4 Turbo
2012 Audi A4 Sedan 2.0L l4 Turbo
2011 Audi A4 Quattro Sedan 2.0L l4 Turbo
2011 Audi A4 Quattro Wagon 2.0L l4 Turbo
2017 Audi A5 Quattro Convertible 2.0L l4 Turbo
2012 Audi A4 Quattro Sedan 2.0L l4 Turbo
2011 Audi A4 Sedan 2.0L l4 Turbo
2014 Audi A5 Quattro Convertible 2.0L l4 Turbo
2014 Audi A5 Convertible 2.0L l4 Turbo
2014 Audi A5 Quattro Coupe 2.0L l4 Turbo
2013 Audi A5 Quattro Coupe 2.0L l4 Turbo
2013 Audi A5 Quattro Convertible 2.0L l4 Turbo
2013 Audi A5 Convertible 2.0L l4 Turbo
2015 Audi A5 Quattro Convertible 2.0L l4 Turbo
2015 Audi A5 Quattro Coupe 2.0L l4 Turbo

Ask a parts specialist

Asking about: Coolant Reservoir / Tank / Bottle 8K0121403H · OEM #8K0121403H