This Hella expansion tank (part 376702434) is a direct OE replacement for a wide range of Audi and Volkswagen models including Tiguan, Passat, Jetta, Beetle, CC, Eos, Golf, GTI, Rabbit, Q3, TT, A3, and Q5. It stores excess coolant and pressure to maintain optimal cooling system operation. Manufactured to OE specifications by Hella, it ensures a reliable, leak-free fit.
Key Features & Benefits
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Extensive Fitment: Compatible with numerous VW and Audi models from 2009-2017.
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OEM Reference: Cross-references part number 1K0121407A for a direct replacement.
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Premium Quality: Built by Hella, a trusted name in automotive cooling and lighting.
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Critical System Function: Prevents overheating by maintaining proper coolant level and pressure.
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Easy Diagnosis: Low coolant indicates potential leaks; replace damaged tank immediately.
Vehicle Fitment
| Make |
Model |
Years |
Engine |
| Volkswagen |
Tiguan |
2009–2017 |
2.0L4 |
| Volkswagen |
Passat |
2012–2017 |
3.6V6 |
| Volkswagen |
Passat |
2014–2017 |
1.8L4 |
| Volkswagen |
Passat |
2009–2010 |
2.0L4 |
| Volkswagen |
Passat |
2012–2015 |
2.0L4 |
| Volkswagen |
Passat |
2012–2014 |
2.5L5 |
| Volkswagen |
Jetta |
2013–2017 |
1.4L4 |
| Volkswagen |
Jetta |
2009–2010 |
2.0L4 |
| Volkswagen |
Jetta |
2013–2015 |
2.0L4 |
| Volkswagen |
Jetta |
2017 |
2.0L4 |
| Volkswagen |
Jetta |
2014–2015 |
1.8L4 |
| Volkswagen |
Jetta |
2013–2014 |
2.5L5 |
| Volkswagen |
Beetle |
2014–2017 |
1.8L4 |
| Volkswagen |
Beetle |
2012–2015 |
2.0L4 |
| Volkswagen |
Beetle |
2012–2014 |
2.5L5 |
| Volkswagen |
CC |
2009–2015 |
2.0L4 |
| Volkswagen |
Eos |
2009–2016 |
2.0L4 |
| Volkswagen |
Golf |
2010–2014 |
2.0L4 |
| Volkswagen |
GTI |
2009–2013 |
2.0L4 |
| Volkswagen |
Rabbit |
2009 |
2.5L5 |
| Audi |
Q3 |
2015–2017 |
2.0L4 |
| Audi |
TT Quattro |
2009–2015 |
2.0L4 |
| Audi |
TT Quattro |
2009 |
3.2V6 |
| Audi |
TT |
2009 |
2.0L4 |
| Audi |
A3 |
2009–2013 |
2.0L4 |
| Audi |
A3 Quattro |
2009 |
3.2V6 |
| Audi |
Q5 |
2010 |
3.2V6 |
Technical Specifications
| Part Number |
1K0121407A |
| Manufacturer Part Number |
376702434 |
| Material |
Reinforced plastic (factory spec) |
| Position |
Engine coolant expansion tank |
| Cross-Reference |
1K0121407A |
Installation Notes
Professional installation recommended; pressure test system after replacement.
About Hella (MAHLE BEHR)
Hella is a globally recognized automotive supplier known for high-quality lighting and cooling system components.