OE Quality
60-Day Returns

Walker 235-1421 Engine Crankshaft Position Sensor
Overview of Walker Products Engine Crankshaft Position Sensor
The Walker Products 235-1421 engine crankshaft position sensor is designed for precise engine timing and reliable performance. This gray sensor is compatible with select Audi and Volkswagen models, including the A4, A6, Passat, and TT Quattro.
- Color: Gray
- Single oval-shaped male connector
- One mounting hole for secure installation
- Three female terminals for accurate signal transmission
- Mounting bracket not included
Detailed Product Features and Specifications
This engine crankshaft position sensor from Walker Products features a single oval-shaped male connector with three female terminals, ensuring a stable electrical connection. The sensor’s gray housing is designed to withstand engine bay conditions while providing accurate crankshaft position data. It includes one mounting hole for straightforward attachment to the engine block, although a mounting bracket is not part of the package. The part number 235-1421 identifies this specific sensor, which is engineered to meet the requirements of various Audi and Volkswagen vehicles.
Walker Products Brand Line Information
Walker Products offers a range of automotive components focused on engine management and emission control. The 235-1421 crankshaft position sensor is part of their sensor lineup, designed to deliver reliable engine timing signals essential for proper fuel injection and ignition. This product line emphasizes compatibility and durability for European vehicle applications, including Audi and Volkswagen models.
Compatible Vehicles and Common Applications
- Compatible with Audi A4 and A4 Quattro models
- Fits Audi A6 and A6 Quattro vehicles
- Suitable for Volkswagen Passat and Clasico
- Works with Volkswagen TT Quattro
- Used to monitor crankshaft position for engine timing and control
Common Issues Addressed by This Sensor
- Engine misfires due to inaccurate crankshaft position data
- Difficulty starting or engine stalling
- Check engine light triggered by sensor faults
- Poor engine performance and reduced fuel efficiency
- Irregular idle or hesitation during acceleration
Installation Notes and Tips
When installing the Walker Products 235-1421 crankshaft position sensor, ensure the engine is cool and the battery is disconnected to prevent electrical shorts. Align the sensor properly using the single mounting hole and secure it firmly. Connect the oval-shaped male connector to the vehicle’s wiring harness, confirming the three female terminals are fully engaged. Since no mounting bracket is included, reuse the original bracket or mounting hardware if necessary. Verify sensor alignment and wiring before starting the engine.
Quality Assurance and Warranty
Walker Products maintains strict quality control standards for their sensors, including the 235-1421 crankshaft position sensor. Each unit undergoes testing to ensure accurate signal output and durability under typical operating conditions. While specific warranty details are not provided here, Walker Products generally offers coverage against manufacturing defects. Consult product documentation or authorized sources for warranty terms.
| Brand | Walker |
| Part Number | 235-1421 |
| Position | Walker Products |
| Color | Gray |
| Connector Gender | Male |
| Connector Quantity | 1 |
| Connector Shape | Oval |
| Mounting Bracket Included | No |
| Mounting Hole Quantity | 1 |
| Terminal Gender | Female |
| Terminal Quantity | 3 |
This part fits 40 vehicles. Search below:
| Year | Make | Model | Submodel | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2011 | Volkswagen | Clasico | 2.0L | L4 | N/A | Sensor Only | ||
| 2006 | Audi | TT Quattro | 1.8L | L4 | N/A | Walker Products | ||
| 2005 | Audi | A4 | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2005 | Audi | A4 Quattro | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2005 | Audi | TT Quattro | 1.8L | L4 | N/A | Walker Products | ||
| 2005 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Sensor Only | |
| 2004 | Audi | A4 | Cabriolet | 3.0L | V6 | N/A | Walker Products | |
| 2004 | Audi | A4 | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2004 | Audi | A4 Quattro | Cabriolet | 3.0L | V6 | N/A | Walker Products | |
| 2004 | Audi | A4 Quattro | Base | Manual | 3.0L | V6 | N/A | Walker Products |
| 2004 | Audi | A4 Quattro | Avant | Manual | 3.0L | V6 | N/A | Walker Products |
| 2004 | Audi | A6 | 3.0L | V6 | N/A | Walker Products | ||
| 2004 | Audi | A6 Quattro | 3.0L | V6 | N/A | Walker Products | ||
| 2004 | Audi | TT Quattro | 1.8L | L4 | N/A | Walker Products | ||
| 2004 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2003 | Audi | A4 | Cabriolet | 3.0L | V6 | N/A | Walker Products | |
| 2003 | Audi | A4 | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2003 | Audi | A4 Quattro | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2003 | Audi | A6 | 3.0L | V6 | N/A | Walker Products | ||
| 2003 | Audi | A6 Quattro | 3.0L | V6 | N/A | Walker Products | ||
| 2003 | Audi | TT Quattro | 1.8L | L4 | N/A | Walker Products | ||
| 2003 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2002 | Audi | A4 | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2002 | Audi | A4 | Automatic CVT | 3.0L | V6 | N/A | Walker Products | |
| 2002 | Audi | A4 Quattro | Manual | 3.0L | V6 | N/A | Walker Products | |
| 2002 | Audi | A6 | 3.0L | V6 | N/A | Walker Products | ||
| 2002 | Audi | A6 Quattro | 3.0L | V6 | N/A | Walker Products | ||
| 2002 | Audi | TT Quattro | Base | 1.8L | L4 | N/A | From Chassis / VIN # 8N-2-026 001; Walker Products | |
| 2002 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2001 | Audi | A4 | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2001 | Audi | A4 Quattro | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2001 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2000 | Audi | A4 | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2000 | Audi | A4 Quattro | Manual | 2.8L | V6 | N/A | Walker Products | |
| 2000 | Audi | A6 Quattro | 2.8L | V6 | N/A | Walker Products | ||
| 2000 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 1999 | Audi | A4 | Manual | 2.8L | V6 | N/A | From Chassis / VIN # 8D-X-200 001; Walker Products | |
| 1999 | Audi | A4 Quattro | Manual | 2.8L | V6 | N/A | Walker Products | |
| 1999 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products | |
| 1998 | Volkswagen | Passat | Manual | 2.8L | V6 | N/A | Walker Products |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.