Home » German Auto Stuff - Coolant Tank Cap - Aluminum - TT / TTS / TTRS Mk3

German Auto Stuff - Coolant Tank Cap - Aluminum - TT / TTS / TTRS Mk3

  • Vendor German Auto Stuff
  • Part # GAS-CTCT3
$47.99
$47.99
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Description Fitment Guide

The German Auto Stuff aluminum coolant tank cap is precision-engineered for TT, TTS, and TTRS Mk3 models. Made from high-grade aluminum, this cap delivers enhanced durability and excellent resistance to heat and corrosion. It maintains the ideal pressure within your cooling system, helping prevent leaks and overheating for consistent engine performance. Designed for a perfect fit, it ensures a secure seal and straightforward installation, making it a reliable choice for optimizing your vehicle’s cooling system integrity.

OEM Cross Reference: 3C0121321, 2Q0121321, 5Q0121321

6061 Aluminum Alloy
The high temperatures in the engine compartment accelerate the aging of factory plastic coolant reservoir cap. Upgrading to 6061 aluminum alloy ensures better heat resistance and durability, maintaining correct pressure and improving cooling efficiency.

Enhanced Grip, Easier Installation
Featuring a double anti-slip pattern design, this cap offers greater friction compared to the factory one-piece handle, easy installation and removal.

Sturdy and durable
CNC machined, anodized for rust-proof durability and long-term performance.

Fitment:

VW For Golf 6 2008-2014
VW For Golf 7 & 7.5 2013-2020
VW For Golf 7 & 7.5 R 2013-2020
VW For Golf 7 & 7.5 GTI & Clubsport 13-20
VW For Golf 8 2020+
VW For Golf 8 R 2020+
VW For Golf 8 GTI 2020+
VW For Golf 8 GTI Clubsport 2020+
VW For Amarok 2010-2020
VW For Arteon 2.0 TSI 2017+
VW For Jetta / GLI 6 2011-2018
VW For Jetta / GLI 7 2018+
VW For Passat 2.0 TSI B8 2015+
VW For Polo 5 GTI 1.8 TSI 6C 2015-2018
VW For Polo 5 GTI 1.4 TSI 6R 2008-2015
VW For Polo 6 AW 2017+
VW For Scirocco 2008-2017
VW For T-Roc R 2.0 TSI 2019+
VW For Tiguan II 2.0 TSI 2016+
Audi S1 2.0 TFSI 2015-2018
Audi A3 8V 2013-2020
Audi A3 8Y 2020+
Audi A3 2.0 TSI 8Y 2020+
Audi S3 8V 2013-2020
Audi S3 8Y 2020+
Audi RS3 2.5 TFSI 8V 2015-2017
Audi RS3 2.5 TFSI 8V.2 evo 2017-2020
Audi RS3 2.5 TFSI 8Y 2021+
Audi TT 2.0 TSI 8S 2014+
Audi TTRS 2.5 TFSI 8S 2017+
Audi Q2 2017+
Audi SQ2 2018+
Audi Q3 2019+
Audi RSQ3 F3 2019+
SEAT Leon III Cupra 5F 2014-2020
SEAT Leon III 5F 2015-2020
SEAT Leon IV FW 2020+
Cupra Leon IV FW 2020+
Skoda Superb III 3V 2015+
Skoda Octavia III vRS 2.0 TSI 5E 2014-2020
Skoda Octavia IV vRS 2.0 TSI 245ps NX 2020+
BaySkoda Octavia IV NX 2020+

Customer Reviews

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Let customers speak for us

from 14 reviews
Forge intake pipe

Some slight modifications to the car and the cold air heat shield was needed but otherwise it fit great. Can really hear her breath now!

Shea Chris
Forge Motorsport - Silicone Turbo Inlet Hose - TT Mk1 225
Very nice!

Love my new side markers - very clean looking and unique in how they flash when turning left or right. The only suggestion I’d make is provide instructions for both installing them and for being very careful with the wire once you disconnect the old light housing Left side went in ok, but I lost the right side into the fender black hole which required me to remove the tire and unscrew most of the lining so I could find the wire!

Jon W.
German Auto Stuff - Clear Side Markers - TT Mk1 1999-2006 - Sequential Amber LED
Perfect!

Very pleased with the replacement floor mats. Excellent quality. Perfect fit.

John Montgomery
Genuine Audi - Carpeted Floor Mats - Front - Black - TT Mk1

Beautiful and amazing fuel pump upgrade for my MK1 Audi TT

L.C.
DeatschWerks - High-Flow Fuel Pump - TT quattro Mk1 / Mk2
Works great

I’m using these in my 8J TT with some Defi gauges. It requires some disassembly of the stock pods to use with these pod adapters, which was the most complicated part of install. Works great. The pod adapters push the gauges out a little further than the photos represent but I found it acceptable.

J
OSIR Design - O-Pod Mono TTMK2 - TT / TTS / TT RS Mk2
Works great

Have had one of these on my 8J TT RS for a few years now. Works great. Installation takes just a few minutes. I only needed to use one of the three available tap ports; I used blue loctite to help ensure the plugs don’t back out (or fall in).

J
Osir Design - O-TAP B - 1.4 / 2.5 Engines
I like them!

This product is fantastic! The smoked side markers look incredible, and the sequential leds are a huge upgrade. Installation was a breeze truly plug-and-play and I had them on in minutes without any hassle. They really modernize the car's look. Highly recommend!

Dan C.
German Auto Stuff - Smoked Side Markers - TT Mk1 1999-2006 - Sequential Amber LED
Perfect Upgrade for My TT Mk1

Totally transformed my 2005 TT Mk1! This German Auto Stuff carbon spoiler looks incredible and was a perfect fit. The quality is outstanding. Installation was quick and easy. My car looks sharp! Highly recommend for any Mk1 owner looking for a premium upgrade!

Dan C.
German Auto Stuff - Carbon Fiber Spoiler - TT Mk1 1999-2006 - Gloss Black
TT parts

Part worked perfectly and arrived on time. I spoke with them before ordering and they took the time to ensure I was receiving the correct part. I will definitely use them again for parts
John M

John Melnick
Forge Motorsport - Silicone Cam Cover Breather Hose 210 - TT Mk1 225

Fit perfectly

Josh
Genuine Audi - Coolant Temperature Sensor Retaining Clip - TT Mk1