The 06A 121 121C flange is an aluminum OE-style coolant flange for select Volkswagen and Audi vehicles. It restores leak-free cooling system performance with a direct bolt-on fit and no modifications required.
$29.00
The 06A 121 121C flange is an OE-style aluminum replacement coolant flange for select Volkswagen and Audi vehicles equipped with the 1.8T four-cylinder engine. Mounted directly to the engine, this flange serves as a critical junction in the cooling circuit — directing coolant between the engine block, cylinder head, and connected hose assemblies to maintain proper coolant flow and stable operating temperature. This aluminum design offers improved resistance to heat-related degradation compared to the original plastic unit, making it a durable direct-fit upgrade for cooling system restoration.
A failing coolant flange will produce clear warning signs that should not be ignored. The most common indicators include visible coolant seepage or dripping around the flange mounting area, a persistent coolant odor from the engine bay after operation, and a low coolant warning light with no obvious external source. Physical inspection may reveal a cracked housing, corroded sealing surfaces, or a deteriorated gasket. Left unaddressed, a leaking flange leads to progressive coolant loss, unstable engine temperature, reduced heater output, and the risk of overheating.
OEM Reference: 06A 121 121C
Aluminum OE-style construction — more durable than the original plastic unit
Precision-formed for correct fit, angle, and mounting alignment
Designed to handle high temperatures and sustained cooling system pressure
Precision sealing surfaces to prevent coolant leaks
Always replace the O-ring or gasket at the mounting flange during installation — reusing the original seal is a common cause of post-repair leaks. Inspect all connected coolant hoses for swelling, softness, or cracking and replace if needed. Torque all fasteners to factory specification to avoid distorting the sealing surface. After installation, refill with the VW/Audi-approved coolant mixture and properly bleed the cooling system to remove trapped air before returning the vehicle to service.
Always verify fitment by VIN before ordering.
| Make | Model | Generation | Year Range | Engine |
|---|---|---|---|---|
| Volkswagen | Golf / GTI | Mk4 | 1999–2006 | 1.8T / 2.0 |
| Volkswagen | Jetta | Mk4 | 1999–2005 | 1.8T / 2.0 |
| Audi | TT / TT Quattro | Mk1 (8N) | 2000–2006 | 1.8T |
| Audi | A4 | B5 | 1997–2001 | 1.8T |
| Audi | A4 | B6 | 2002–2005 | 1.8T |
06A 121 121
06A 121 121A
06A 121 121B
| Weight | 0.75 lbs |
|---|---|
| Dimensions | 8.0 × 5.0 × 4.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2000-2006 | Audi | TT | 1.8L | |
| 1998-2000, 2004-2005 | Volkswagen | Beetle | 1.8L | |
| 2006-2010 | Volkswagen | Beetle | 2.0L | |
| 2006 | Volkswagen | GTI | 2.0L | |
| 2000-2006 | Volkswagen | Golf | 1.8L | |
| 2000-2006 | Volkswagen | Golf | 2.0L | |
| 1999-2006 | Volkswagen | Jetta | 1.8L | |
| 1999-2011 | Volkswagen | Jetta | 2.0L |
The 5N0 122 291 is an OE-style upper radiator coolant hose adapter by Burgaflex, engineered for the VW Tiguan Mk1 (5N-chassis) equipped with the 2.0L EA113/EA888 engine. Positioned at the front upper radiator hose junction, this coupling piece — supplied with its C-clip and seal — provides a secure, leak-free connection between the upper coolant hose and the radiator inlet. It serves as a cost-effective alternative to the Genuine VW part while maintaining OE-style fit and performance. Always confirm fitment by VIN before ordering.
The Service Tech ABS Speed Sensor WHT003860 is a cost-effective, OE-style replacement for select Volkswagen and Audi models. It delivers precise wheel-speed data to your ABS, ESP, and traction control systems with a plug-and-play installation and no modifications required.
The ATE ABS Speed Sensor WHT003859 is a premium OE-quality replacement for select Audi and Volkswagen models. It delivers precise wheel-speed data to your ABS, ESP, and traction control systems with a true plug-and-play installation.
The Graf 06A 121 012G is an OE-quality timing-belt-driven water pump for select Volkswagen and Audi 1.8T and 2.0 engines. Built for direct installation with no modifications required.
The Graf 06K 121 011C Water Pump is an OE-quality coolant pump engineered for select Volkswagen and Audi EA888 1.8T and 2.0T TSI/TFSI engines. This direct-fit replacement features a precision aluminum housing, correct impeller geometry, and a high-quality bearing and seal assembly for factory-spec coolant circulation and long service life. Includes gasket or O-ring for a complete installation.
