--- product_id: 54182566 title: "HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4" brand: "hxlong" price: "€ 34.40" currency: EUR in_stock: true category: "Misc." url: https://www.desertcart.it/products/54182566-hxlong-brake-fluid-tester-auto-diagnostic-brakes-testing-tool-calibrated store_origin: IT region: Italy --- # HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 **Brand:** hxlong **Price:** € 34.40 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 by hxlong - **How much does it cost?** € 34.40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/54182566-hxlong-brake-fluid-tester-auto-diagnostic-brakes-testing-tool-calibrated) ## Best For - hxlong enthusiasts ## Why This Product - Trusted hxlong brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Feature: Staying safe and knowing that your car is in top condition is most important. Ideally, brake fluid should be checked regularly and changed every one to two years. As moisture seeps into the brake system through the brake hoses and seals the brake fluid will become contaminated and the danger of brake failure will increase. This pen-shaped brake fluid tester can easily help determine whether it's time for you to change your brake fluid. How to do: 1. Turn on the brake fluid tester by pressing the button. A green light should light up. If the light does not come on, it may be time to change a battery. 2. Unscrew the lid for the brake fluid reservoir, and take off the cap for the brake fluid tester. 3. Dip the test probes into the brake fluid and the LED lights will indicate the percentage of water in the brake fluid. 4. After testing, remember to screw the lid of the brake fluid reservoir back on tightly. 5. The tester will automatically power off after 12 seconds of inactivity. The LED lights will indicate the percentage of water in the brake fluid: Indicator Instruction: ►Green LED （ ►Yellow LED （ ►Yellow LED （ ►Red LED ( ►Red LED (>4%) ON:the brake fluid performance is extremely poor,it need to be replaced immediately! Package included: 1 X Brake Fluid Tester Tools ## Features - ★[USE]: Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs - ★LED LIGHTS: 5 LED lights show percentage of water in the brake fluid. Change brake fluid if percentage is more than 3% - ★Using the AC pulse testing method,greatly to reduce the polarization phenomenon during the brake fluid testing,the test result is accurate and the measuring speed is fast. - ★ The brake fluid tester can be used for DOT 3/4/5 brake fluid. (the original DOT4 + brake fluid is common.) - ★POWER SUPPLY: 1.5V "AAA" x 1 (not included) ## Images ![HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 - Image 1](https://images-eu.ssl-images-amazon.com/images/I/511E-VffitL.jpg) ![HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 - Image 2](https://images-eu.ssl-images-amazon.com/images/I/51tcnco0TBL.jpg) ![HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 - Image 3](https://images-eu.ssl-images-amazon.com/images/I/41N-YWRbZKL.jpg) ![HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 - Image 4](https://images-eu.ssl-images-amazon.com/images/I/51Nn-lOZp9L.jpg) ![HXLONG Brake Fluid Tester, Auto Diagnostic Brakes Testing Tool Calibrated with 5 LED Indicator Brake Fluid Oil Detection Mini Pen Liquid Moisture Water Tester Tool For DOT3 DOT4 - Image 5](https://images-eu.ssl-images-amazon.com/images/I/51-0KFmKZbL.jpg) --- ## 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.it/products/54182566-hxlong-brake-fluid-tester-auto-diagnostic-brakes-testing-tool-calibrated](https://www.desertcart.it/products/54182566-hxlong-brake-fluid-tester-auto-diagnostic-brakes-testing-tool-calibrated) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-11*