---
product_id: 238603108
title: "Water Temperature Sensor 1/2NPT Engine Coolant Temp Gauge Replacement 38℃ to 120℃ for Oil Water Temperature"
brand: "walfront"
price: "€ 30.99"
currency: EUR
in_stock: true
reviews_count: 7
category: "Walfront"
url: https://www.desertcart.pt/products/238603108-water-temperature-sensor-1-2npt-engine-coolant-temp-gauge-replacement
store_origin: PT
region: Portugal
---

# 1/2NPT thread size ±1.5% accuracy 38℃~120℃ range Water Temperature Sensor 1/2NPT Engine Coolant Temp Gauge Replacement 38℃ to 120℃ for Oil Water Temperature

**Brand:** walfront
**Price:** € 30.99
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay Cool, Stay Ahead — Never Miss a Beat with Precision Sensing!

## Quick Answers

- **What is this?** Water Temperature Sensor 1/2NPT Engine Coolant Temp Gauge Replacement 38℃ to 120℃ for Oil Water Temperature by walfront
- **How much does it cost?** € 30.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/238603108-water-temperature-sensor-1-2npt-engine-coolant-temp-gauge-replacement)

## Best For

- walfront enthusiasts

## Why This Product

- Trusted walfront brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Replacement:** Direct swap for old or faulty sensors—no complex installation needed.
- • **Universal 1/2NPT Thread:** Seamlessly fits most standard engine ports without extra adapters or hassle.
- • **Robust Brass Construction:** Durable brass body ensures long-lasting reliability under harsh conditions.
- • **Stable & Sensitive Response:** High sensitivity sensor delivers consistent, real-time temperature readings.
- • **Precision Temperature Control:** Accurately monitors water temp from 38℃ to 120℃ for optimal engine performance.

## Overview

The Walfront 1PC Water Temperature Sensor features a durable brass build with a universal 1/2NPT thread, delivering precise analog temperature readings within a 38℃ to 120℃ range and ±1.5% accuracy. Designed for easy replacement and stable performance, it’s ideal for professional-grade engine monitoring and maintenance.

## Description

Buy 1PC Water Temperature Sensor, 1/2NPT Water Temperature Sensor for Oil Water Temperature Temp Gauge, 38℃~120℃: Water Temp - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Cat 3406 mechanical coolant temp - This is the one I was looking for ti for my application on a 3406 mechanical engine. Space was a concern as I didn’t need a bushing so the 1/2” size fit into my application much better. One terminal is smaller than the other so pay attention!
Review: Good sensor but read the review to connect it properly - These sensors are supposed to be VDO 1009 as suggested by the laser engraved numbers on the head of the element. However, as far as I can tell the only VDO 1009 was the 323-803-001-009D which is no longer made. The 1009 should have a metric thread specifically M14 X 1.5. This particular sensor looks more like the 1019 which had a 1/2 NPT thread. Either one was a common ground sensor meaning that the ground connection is made via the engine block. There are two pins on the connector the wider one (G=gauge, 6.3 mm wide) is the output of the sensor. The narrow one (W=warning, 4.8 mm wide) is for the warning light which is normally open. The switch of the 1009 should close at 102°C while the one for the 1019 should do it at 92°C. As far as I can tell the switch of these sensors closes at around 87°C, turning off when the temperature drops back to about 82°C (about 180F). This is a bit outside the tolerance given by VDO (95+/-3) but they don’t specify at what resistance the switch is considered to be “open” so there is some room for error here. The sensor itself seems to be well within tolerances and the readings of resistance versus temperature follow closely the VDO tables. Overall the sensor performs well and it's beautifully machined. If you don’t require a super accurate switching point these are a good deal.

## Features

- The water temp sensor made of material, to use. Thread size: 1/2NPT.
- HIGH RELIABILITY: The engine temp sensor adopts professional manufacturing, excellent sensitivity and high reliability.
- EASY TO USE: The engine temperature sensor is a great and direct replacement for the old or damaged one.
- STABLE PERFORMANCE: The water temp sensor replacement has small body and . Threshold: 103℃.
- BRAND NEW: The water temperature sensor is brand new and . Measuring Range: 38℃ to 120℃.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SNP1R73 |
| Best Sellers Rank | #140,691 in Automotive ( See Top 100 in Automotive ) #31 in Automotive Water Temperature Gauges |
| Brand | Walfront |
| Brand Name | Walfront |
| Customer Reviews | 4.2 out of 5 stars 43 Reviews |
| Item Dimensions | 3.15 x 1.57 x 1.57 inches |
| Item dimensions L x W x H | 3.15 x 1.57 x 1.57 inches |
| Lower Temperature Rating | 38 °C |
| Manufacturer | Walfront |
| Material | Brass |
| Material Type | Brass |
| Measurement Accuracy | ±1.5% |
| Measuring Range | 38℃ to 120℃ |
| Model | 1PC |
| Mounting Type | Flange Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| Output Type | Analog |
| Part Number | Wal frontk4aug83gxi |
| Specific Uses For Product | Temperature Sensor |
| Style | Durable |
| Style Name | Durable |
| UPC | 746771790190 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 120 °C |

## Product Details

- **Brand:** Walfront
- **Item dimensions L x W x H:** 3.15 x 1.57 x 1.57 inches
- **Lower Temperature Rating:** 38 °C
- **Material:** Brass
- **Style:** Durable

## Images

![Water Temperature Sensor 1/2NPT Engine Coolant Temp Gauge Replacement 38℃ to 120℃ for Oil Water Temperature - Image 1](https://m.media-amazon.com/images/I/510RslowqOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cat 3406 mechanical coolant temp
*by J***. on October 1, 2025*

This is the one I was looking for ti for my application on a 3406 mechanical engine. Space was a concern as I didn’t need a bushing so the 1/2” size fit into my application much better. One terminal is smaller than the other so pay attention!

### ⭐⭐⭐⭐⭐ Good sensor but read the review to connect it properly
*by A***E on January 14, 2023*

These sensors are supposed to be VDO 1009 as suggested by the laser engraved numbers on the head of the element. However, as far as I can tell the only VDO 1009 was the 323-803-001-009D which is no longer made. The 1009 should have a metric thread specifically M14 X 1.5. This particular sensor looks more like the 1019 which had a 1/2 NPT thread. Either one was a common ground sensor meaning that the ground connection is made via the engine block. There are two pins on the connector the wider one (G=gauge, 6.3 mm wide) is the output of the sensor. The narrow one (W=warning, 4.8 mm wide) is for the warning light which is normally open. The switch of the 1009 should close at 102°C while the one for the 1019 should do it at 92°C. As far as I can tell the switch of these sensors closes at around 87°C, turning off when the temperature drops back to about 82°C (about 180F). This is a bit outside the tolerance given by VDO (95+/-3) but they don’t specify at what resistance the switch is considered to be “open” so there is some room for error here. The sensor itself seems to be well within tolerances and the readings of resistance versus temperature follow closely the VDO tables. Overall the sensor performs well and it's beautifully machined. If you don’t require a super accurate switching point these are a good deal.

### ⭐⭐⭐⭐⭐ Temp sensor
*by V***O on June 5, 2025*

100% Quality and time delivery

## Frequently Bought Together

- 1PC Water Temperature Sensor, 1/2NPT Water VDO Temperature Sensor for Oil Water Temperature Temp Gauge, 38℃~120℃
- Oil Pressure Sender, VDO Oil Pressure Sending Unit 0-10 Bar, 1/8-27 NPTF Thread Oil Pressure Sensor Sender for VDO Measurement and Control
- Oil Pressure Sensor Universal VDO Generator 0 to 10 Bars 1/8NPT Oil Induction Plug Generator Oil Sensor

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/238603108-water-temperature-sensor-1-2npt-engine-coolant-temp-gauge-replacement](https://www.desertcart.pt/products/238603108-water-temperature-sensor-1-2npt-engine-coolant-temp-gauge-replacement)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-11-12*