The Metrix 06A 121 012G Water Pump is an OE-style timing-belt-driven coolant pump engineered for select Volkswagen and Audi 4-cylinder 1.8T and 2.0 engines. This direct-fit replacement restores factory-spec coolant circulation with a precision-cast housing, correct impeller design, and high-quality bearing and seal assembly. Includes a new O-ring seal for a complete installation.
$30.00
The 06A 121 012G Water Pump is an OE-style replacement cooling component manufactured by Metrix for select Volkswagen and Audi 4-cylinder 1.8T and 2.0 8V/20V engines. Driven by the timing belt, this pump continuously circulates coolant through the engine and radiator, maintaining the correct operating temperature and protecting the engine from overheating during normal and demanding driving conditions.
Metrix engineers the 06A 121 012G to meet OEM specifications in every critical dimension — from the precision-cast and machined housing to the correctly profiled impeller — ensuring accurate coolant flow rates and leak-free sealing from day one. The high-quality bearing and mechanical seal assembly provides quiet, long-term service life, and the unit includes a new O-ring seal for a complete, properly sealed installation using the original mounting points and connections.
A failing timing-belt-driven water pump shows recognizable warning signs before complete failure. The most common symptoms include bearing noise or roughness felt through the timing cover, visible shaft play, coolant leaks at the weep hole or sealing surface, and unexpectedly rising engine temperatures. Because this pump is driven by the timing belt, a seized or failing pump can place additional stress on the belt and tensioner, increasing the risk of belt failure and serious engine damage. When these symptoms appear, replacing the unit immediately — along with the timing belt, tensioner, and idlers — is the safest and most cost-effective course of action.
OEM Reference: 06A 121 012G
Brand: Metrix — OE-specification cooling system supplier
Timing-belt-driven water pump for VW and Audi 1.8T and 2.0 4-cylinder engines
Precision-cast and machined housing for accurate, leak-free fitment
Correct impeller design for factory-spec coolant circulation
High-quality bearing and mechanical seal for quiet, long service life
Includes new O-ring seal
Direct bolt-on replacement — no modifications required
This pump is driven by the timing belt and should always be replaced during a scheduled timing belt service. It is strongly recommended to install a new timing belt, tensioner, and idler pulleys at the same time to maximize labor efficiency and long-term reliability. Refill with VW/Audi-approved G12, G12+, or G13 coolant and bleed the cooling system thoroughly after installation.
Always verify fitment by VIN before ordering. Engine variant and production date may affect compatibility within the same model year; confirm applicability for your specific vehicle before purchase.
| Make | Model | Generation | Year Range | Engine |
|---|---|---|---|---|
| Volkswagen | Golf / GTI | MK4 | 1999–2006 | 1.8T / 2.0 8V |
| Volkswagen | Jetta | MK4 | 1999–2005 | 1.8T / 2.0 8V |
| Volkswagen | Passat | B5 / B5.5 | 1998–2005 | 1.8T / 2.0 |
| Volkswagen | New Beetle | — | 1998–2006 | 1.8T / 2.0 |
| Volkswagen | Golf / GTI | MK3 | 1993–1999 | 2.0 8V |
| Volkswagen | Jetta | MK3 | 1993–1999 | 2.0 8V |
| Audi | A4 | B5 / B6 | 1996–2004 | 1.8T / 2.0 |
| Audi | A4 | B5 | 1996–2001 | 1.8T 20V |
| Audi | TT | 8N | 1999–2006 | 1.8T 20V |
| Audi | A3 | 8L | 1997–2003 | 1.8T 20V |
Cross Reference Numbers
06A 121 011C
06A 121 011E
06A 121 011F
06A 121 011G
06A 121 011H
06A 121 011L
06A 121 011Q
06A 121 011T
06A 121 012
06A 121 012B
06A 121 012D
06A 121 012E
| Weight | 3.5 lbs |
|---|---|
| Dimensions | 7.0 × 6.0 × 5.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2001, 2006 | Audi | A4 | 1.8T | |
| 2000, 2006 | Audi | TT | 1.8T | |
| 1998, 2005 | Volkswagen | Beetle | 1.8T | |
| 2004, 2006 | Volkswagen | Beetle | 1.9T | |
| 1998, 2005 | Volkswagen | Beetle | 2.0T | |
| 1999, 2006 | Volkswagen | Golf IV | 1.8T | |
| 1999, 2006 | Volkswagen | Golf IV | 2.0T | |
| 1999, 2006 | Volkswagen | Jetta IV | 1.8T | |
| 2000, 2005 | Volkswagen | Passat | 1.8T |
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