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Standard Ignition TX51 Engine Coolant Temperature Sensor
Reliable Engine Coolant Temperature Sensor for Audi, BMW, Volkswagen
The Standard Ignition TX51 Engine Coolant Temperature Sensor is designed to provide accurate temperature readings for your vehicle's engine management system. Compatible with select Audi, BMW, and Volkswagen models, this sensor ensures optimal engine performance and efficient cooling system operation.
- Attachment Method: Bolt on for secure installation
- Connector Gender: Female with one rectangular plug-in connector
- Material: Durable brass construction for long-lasting use
- Terminal Type: Two male blade terminals for reliable electrical connection
- Compatible with multiple Audi, BMW, and Volkswagen models including 318i, 535i, 740iL, Golf, and S4
Technical Details and Compatibility
The TX51 sensor features a bolt-on attachment method, making it straightforward to install on compatible vehicles. Its female rectangular plug-in connector with a single connection point ensures a secure fit with the vehicle’s wiring harness. Constructed from brass, the sensor offers resistance to corrosion and heat, which is critical for accurate temperature measurement in the engine coolant system. The two male blade terminals provide a stable electrical interface, minimizing the risk of connection issues.
This sensor is compatible with a range of Audi models such as the 4000 and 4000 Quattro, BMW models including the 318i, 318is, 318ti, 524td, 530i, 535i, 535is, 540i, 740i, 740iL, and 750iL, as well as Volkswagen models like the Golf, Quantum, S4, S6, and V8 Quattro. The part number TX51 ensures you are selecting the correct sensor for these specific vehicles.
Common Applications and Problem Resolution
- Helps regulate engine temperature by providing accurate coolant temperature data
- Prevents engine overheating by enabling proper cooling fan operation
- Supports efficient fuel injection timing and engine performance
- Resolves issues related to erratic temperature gauge readings
- Addresses engine warning light triggers caused by faulty temperature sensors
Installation Notes and Tips
When installing the Standard Ignition TX51 sensor, ensure the engine is cool to avoid burns or injury. Use the bolt-on attachment method to secure the sensor firmly in place. Verify the female rectangular plug-in connector aligns correctly with the vehicle’s wiring harness. Check that the two male blade terminals are clean and free of corrosion before connecting. After installation, clear any diagnostic trouble codes and monitor engine temperature readings to confirm proper sensor function.
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The TX51 Engine Coolant Temperature Sensor undergoes rigorous quality control testing to maintain consistent accuracy and longevity. This part is backed by Standard Ignition’s limited warranty, providing coverage against defects in material and workmanship under normal use.
| Brand | Standard Ignition |
| Part Number | TX51 |
| Attachment Method | Bolt On |
| Connector Gender | Female |
| Connector Shape | Rectangular |
| Connector Type | Plug In |
| Material | Brass |
| Terminal Gender | Male |
| Terminal Type | Blade |
This part fits 64 vehicles. Search below:
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1999 | BMW | 318i | N/A | 2 Terminal Fitment | |||
| 1999 | BMW | 318is | N/A | 2 Terminal Fitment | |||
| 1999 | BMW | 318ti | N/A | 2 Terminal Fitment | |||
| 1999 | BMW | 740iL | N/A | Threaded; 2 Term. | |||
| 1998 | BMW | 740i | N/A | 2 Terminal Fitment | |||
| 1998 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1997 | Audi | S6 | N/A | White; 2 Pin | |||
| 1997 | BMW | 740i | N/A | 2 Terminal Fitment | |||
| 1997 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1996 | Audi | S6 | N/A | White; 2 Pin | |||
| 1996 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1995 | Audi | S6 | N/A | White; 2 Pin | |||
| 1995 | BMW | 530i | N/A | ||||
| 1995 | BMW | 540i | N/A | ||||
| 1995 | BMW | 740i | N/A | 2 Terminal Fitment | |||
| 1995 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1994 | Audi | S4 | N/A | ||||
| 1994 | Audi | V8 Quattro | N/A | ||||
| 1994 | BMW | 530i | N/A | ||||
| 1994 | BMW | 540i | N/A | ||||
| 1994 | BMW | 740i | N/A | 2 Terminal Fitment | |||
| 1994 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1994 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1993 | Audi | S4 | N/A | ||||
| 1993 | Audi | V8 Quattro | N/A | ||||
| 1993 | BMW | 535i | N/A | ||||
| 1993 | BMW | 740i | N/A | ||||
| 1993 | BMW | 740iL | N/A | On Thermostat Housing | |||
| 1993 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1992 | Audi | S4 | N/A | ||||
| 1992 | Audi | V8 Quattro | N/A | ||||
| 1992 | BMW | 535i | N/A | ||||
| 1992 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1992 | Volkswagen | Golf | 1.6L | L4 | N/A | ||
| 1991 | Audi | Coupe Quattro | N/A | ||||
| 1991 | Audi | V8 Quattro | N/A | ||||
| 1991 | BMW | 535i | N/A | ||||
| 1991 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1991 | Volkswagen | Golf | 1.6L | L4 | N/A | ||
| 1990 | Audi | Coupe Quattro | N/A | ||||
| 1990 | Audi | V8 Quattro | N/A | ||||
| 1990 | BMW | 535i | N/A | ||||
| 1990 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1989 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1988 | Audi | 90 | Automatic | 2.3L | L5 | N/A | |
| 1988 | BMW | 535i | N/A | ||||
| 1988 | BMW | 535is | N/A | Center Sensor; Located On Thermostat Housing | |||
| 1988 | BMW | 750iL | N/A | 2 Terminal Fitment | |||
| 1988 | Volkswagen | Quantum | N/A | ||||
| 1987 | Audi | 4000 Quattro | 2.2L | L5 | N/A | ||
| 1987 | Audi | Coupe | 2.2L | L5 | N/A | ||
| 1987 | Volkswagen | Quantum | N/A | ||||
| 1986 | Audi | 4000 | 2.2L | L5 | N/A | ||
| 1986 | Audi | 4000 Quattro | 2.2L | L5 | N/A | ||
| 1986 | Audi | Coupe | N/A | ||||
| 1986 | BMW | 524td | N/A | ||||
| 1986 | Volkswagen | Quantum | N/A | ||||
| 1985 | Audi | 4000 | 2.2L | L5 | N/A | ||
| 1985 | Audi | 4000 Quattro | 2.2L | L5 | N/A | ||
| 1985 | Audi | Coupe | N/A | ||||
| 1985 | BMW | 524td | N/A | ||||
| 1985 | Volkswagen | Quantum | 2.2L | L5 | N/A | ||
| 1984 | Audi | 4000 | 2.2L | L5 | N/A | ||
| 1984 | Audi | 4000 Quattro | 2.2L | L5 | N/A |
* 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.