Introduction To 357919501A Coolant Temperature Sensor
357919501A is a standards-compliant 4-pin Engine Coolant Temperature (ECT) sensor and gauge temperature signal sender. The product is a direct replacement (reference numbers: 357919501A y 6U0919501B). Its structural features include a 20 mm push-in/snap-in mounting stem and a black, durable housing with a prominent yellow identification ring. The sensor is widely used across a range of classic European models, For Volkswagen Golf Mk3 / GTI (1993–1999, including 1.8L, 2.0L 8V, 2.8L 12V VR6, and 1.9L TDI engines), For VW Jetta Mk3 / Vento (1993–1999), For VW Passat B3 / B4 (1992–1997), For VW Cabrio (1995–2002), For VW Corrado (1992–1995, 2.8L VR6 engine), For VW EuroVan / Transporter T4 (1992–2003, 2.5L / 2.8L engines), and For VW Polo / Caddy, among other models.
Internally, it integrates two independent negative temperature coefficient (NTC) thermistors, encapsulated in a corrosion-resistant brass sensing tip. Circuit 1 provides a precise analog resistance signal to the engine control unit (ECU) for fuel injection enrichment, cold-start timing control, idle stabilization, and staged activation of the cooling fan; circuit 2 provides the signal to the coolant temperature gauge on the instrument cluster. Replacing a sensor with degraded performance or data drift can resolve hard cold starts, unstable idle, engine “flooding,” cooling fan failure, inaccurate gauge readings, and overly rich fuel trim (rich air-fuel mixture), and can clear OBD trouble codes P0115, P0116, P0117, y P0118. The product comes with a high-temperature-resistant sealing O-ring and retaining clip, supports plug-and-play installation, and ensures no leaks after installation.
Compatibilidad con vehículos y lista de referencias de equipo original
A continuación se incluye el alcance completo de la aplicación del vehículo y los números de referencia de piezas de equipo original intercambiables para tu consulta rápida.
| Vehicle Make | Modelo del vehículo | Años de fabricación | Desplazamiento |
|---|---|---|---|
| VW | Golf / Golf GTI | 1993–1999 | 1.8L / 2.0L / 2.8L VR6 / 1.9L TDI |
| VW | Jetta / Vento | 1993–1999 | 1.8L / 2.0L / 2.8L VR6 / 1.9L TDI |
| VW | Passat | 1992–1997 | 2.0L 8V / 2.8L VR6 / 1.9L TDI |
| VW | Cabrio / Cabriolet | 1995–2002 | 2.0L 8V |
| VW | Corrado | 1992–1995 | 2.8L / 2.9L VR6 |
| VW | EuroVan / Transporter | 1992–2003 | 2.4D / 2.5L / 2.8L VR6 |
| VW | Polo / Caddy | 1995–2001 | 1.4L / 1.6L / 1.9L SDI/TDI |
| OE Part Numbers | 357919501A / 357 919 501 A / 6U0919501B / 6U0 919 501 B | ||
Compliance Notice: All vehicle brand names, model designations, and engine codes listed below are referenced strictly to provide technical fitment and compatibility information.
Condiciones comerciales para la venta al por mayor
Cantidad mínima de pedido
Our coolant temperature sensor 357919501A, standard minimum MOQ is 10 pieces per model. We also accept mixed orders of different sensor models to meet your diverse sourcing needs.
Plazo de entrega
For all in-stock coolant temperature sensor, we can arrange shipment within 3-7 business days. For large-volume wholesale orders, the production and delivery cycle is approximately 15 to 20 business days.
Política de garantía
Coolant temperature sensor 357919501A, come with a 12-month OE-quality warranty. If any manufacturing defect occurs within the warranty period, send us a video and we’ll offer a free return or exchange.
Servicio de fabricación para terceros (OEM) y de marca blanca
Nuestros envases de marca se pueden personalizar en cuanto a tamaño, materias primas y procesos de envasado para satisfacer las necesidades de los distintos mercados regionales. Además, ofrecemos colaboraciones de producción flexibles y fiables para mayoristas, distribuidores, compradores al por mayor y empresas comerciales de todo el mundo. En resumen, ofrecemos un servicio integral de marca blanca, que incluye logotipos grabados con láser, etiquetas de producto personalizadas, bolsas de plástico selladas e impresión de cajas a color.
Professional Installation Guidelines
- Safety Preparation: Allow the engine cooling system to cool down completely to ambient temperature. Slowly open the coolant expansion tank cap to relieve residual pressure, then retighten lightly.
- Locate the Sensor: Locate the 357919501A sensor mounted in the plastic coolant water outlet flange on the cylinder head (typically near the upper radiator hose connection).
- Disconnect Harness: Depress the wire or plastic retaining bail on the 4-pin square electrical plug and pull straight off.
- Remove Retaining Clip: Place a catch pan beneath the engine flange. Slide the plastic U-shaped retaining clip horizontally out of the slot.
- Extract Sensor & Old O-Ring: Pull the sensor straight out. Ensure the old rubber O-ring is removed from inside the flange recess (do not leave the old ring inside).
- Install New Sensor with Lubricated O-Ring: Fit the supplied new O-ring onto the brass collar of the new 357919501A sensor. Lightly moisten the O-ring with clean coolant and push the sensor firmly into the flange.
- Secure Clip & Reconnect: Slide the U-clip fully into the locking channels to lock the sensor in place. Reconnect the 4-pin wiring plug until locked. Top up coolant level in the expansion tank, run the engine to operating temperature, and verify there are no leaks.
Centro de ayuda
PREGUNTAS FRECUENTES
Q1: Why does the 357919501A sensor feature 4 electrical pins and a yellow identification ring?
A: The 4-pin design integrates two independent NTC circuits in one brass body. One circuit sends coolant temperature data to the engine ECU. The other drives the instrument gauge. The yellow ring identifies its resistance curve for Mk3 and B4 era vehicles.
Q2: Why are part numbers 357919501A and 6U0919501B interchangeable across for VW and for Skoda?
A: Both numbers represent the same 4-pin clip-in coolant sensor. The 357919501A is the classic reference used across for VW, Seat, and Audi. Meanwhile, the 6U0919501B is the updated equivalent used for Skoda and late-production cooling flanges. Both share identical fit and calibration.
Q3: What engine symptoms and OBD-II fault codes indicate a failing 357919501A sensor?
A: A failing sensor triggers trouble codes P0115, P0116, P0117, or P0118. Common driving symptoms include hard cold starting, rough idle, and black exhaust smoke from rich fuel mixtures. Other signs are radiator fan staging errors, increased fuel consumption, or an erratic dashboard gauge.
Q4: How does a faulty coolant temperature sensor cause rich running and hard starting?
A: If the ECU thermistor circuit fails open, the computer assumes the coolant is at sub-zero temperatures and injects excess fuel. This causes cold-start flooding, fouled spark plugs, unburned fuel smell, and stumbling idle once the engine warms up to normal operating temperature.
Q5: What precautions should be taken when replacing this clip-in coolant sensor?
A: Always wait for the engine to cool before removing the plastic retaining clip. Remove the old O-ring from the housing bore, apply clean coolant to lubricate the new O-ring, push the sensor fully into the flange, and snap the retaining clip securely into its groove.
