OVERVIEW
Genuine VW/Audi clutch pedal over-center spring, part number 1K0-721-403. This spring works within the matching manual-transmission clutch pedal mechanism to shape pedal effort through its travel. As the pedal moves through the over-center geometry, the spring's assistance changes with the pedal position. It is a pedal assembly component, separate from the clutch pressure plate and hydraulic operating cylinders.
Technical details
- Original part number: 1K0-721-403 / 1K0721403.
- Application: matching clutch pedal mechanism on manual-transmission vehicles.
- Coil spring with molded end supports, visible in the product photos.
- The matching factory parts assignment identifies PR code 0EN, associated with MQ350 transmission components.
- Supplied as one spring assembly. Pedal, pivot hardware and hydraulic cylinders are separate components.
Common reasons to replace
A fractured spring, damaged end support or spring that no longer stays correctly seated can affect pedal feel and operation. Replacement may also be appropriate when inspection during pedal service reveals wear or damage at this component. Check the spring's locating points and the surrounding pedal mechanism before installing the new part.
An unusual pedal effort, creak or incomplete pedal return needs diagnosis of the complete system. Worn pedal pivots, broken mounting points, hydraulic leakage, trapped air or clutch faults can produce similar complaints. This spring does not repair a leaking master or slave cylinder, a binding release mechanism or a worn clutch.
Installation and service notes
Confirm the VIN, gearbox and pedal assembly before ordering. Manual transmission alone does not make every pedal spring interchangeable: the installed mechanism and factory parts assignment must match. This spring is not used as a clutch pedal component on a DSG or conventional automatic vehicle.
Follow the repair manual's removal and installation sequence because the spring is loaded in the pedal mechanism. Check the molded supports and mounting seats for damage, and ensure the spring is seated in the specified orientation. After assembly, verify full pedal travel, smooth operation and return before returning the vehicle to service.
Fitment
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen GTI | 2006–2009 | 2.0L turbocharged gasoline inline-4 | Mk5 hatchback; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
| Volkswagen GTI | 2010–2014 | 2.0L turbocharged gasoline inline-4 | Mk6 hatchback; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
| Volkswagen Golf R | 2012–2013 | 2.0L turbocharged gasoline inline-4 | Mk6 hatchback; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
| Volkswagen Golf | 2010–2014 | 2.0L TDI diesel inline-4 | Mk6 TDI hatchback; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
| Volkswagen Jetta GLI | 2006–2009 | 2.0L turbocharged gasoline inline-4 | Mk5 GLI sedan; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
| Volkswagen Jetta GLI | 2012–2018 | 2.0L turbocharged gasoline inline-4 | Mk6 GLI sedan; Six-speed manual only; PR 0EN / MQ350 matching pedal assembly | Clutch pedal over-center spring; confirm installed pedal mechanism and PR code. Excludes DSG / automatic. |
Confirm the installed pedal mechanism and PR code by VIN. Automatic and DSG configurations are excluded.