Will this work with 5.1 brake fluid?

Thanks for asking. The ITEQ Brake Fluid Tester works with DOT 3, DOT 4 and DOT 5.1 brake fluids but not with DOT 5 Brake Fluid. The main difference between DOT 4 and DOT 5.1 brake fluids is in their boiling points. DOT 4 and DOT 5.1 are both glycol-based brake fluids which are used widely in the automotive and cycle industry. They are compatible with each other, which means they can be readily mixed without harming your brake system. But please never mistake with DOT 5 which is silicone-based and should never be mixed with any other DOT fluid. Hope these information can be help with you.

Why it says here also for dot 3 and package says for dot 4?

Hi, the tester works for both dot 3 and dot 4 brake fluid. And the dot 4 liquid is more widely applied because it has better performance than dot 3 liquid. The package will be changed.

Dipping just the tip of the prongs seems to give an accurate reading. When you submerge them all the way per the instructions it reads red??

No, you need to dip the prongs all the way to the plastic rim to get a reliable reading. If you dip only the tips, the tester may indicate less moisture than what's really present.

My sonata has a plastic strainer at top. how can i get the probes past that? how to remove strainer?

I don't have a Hyundai, but my Nissan has the strainer, and it is removable. Maybe try and see if yours is removable. I just stuck my finger in and applied outward pressure to the wall and it eventually lifted out. Hope it helps. The device definitely works though.

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Brake Fluid Liquid Tester Pen with 5 LED Indicators, Calibrated For DOT3 DOT4 Brake Fluid

Brake Fluid Liquid Tester Pen with 5 LED Indicators, Calibrated For DOT3 DOT4 Brake Fluid

Product ID: 310832896

⚡5 LED indicators for instant fluid status

🔋AAA battery powered, portable & ready

⏱️Results in seconds, no waiting

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€ 28.41

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Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗💡 Stay ahead on the road with instant brake fluid insights!

SAFETY FIRST ALERTS - Clear color-coded warnings from green to urgent red keep you ahead of brake failure risks.
CERTIFIED QUALITY DURABILITY - CE & RoHS approved with protective cap—trusted reliability for your vehicle’s lifeline.
COMPACT USER FRIENDLY DESIGN - Lightweight pen-style tester fits in your glovebox for on-the-go safety checks.
INSTANT BRAKE FLUID HEALTH CHECK - 5-color LED display reveals water % in seconds—never get caught off guard.
CALIBRATED FOR DOT 3 DOT 4 FLUIDS - Precision testing tailored for modern brake fluids, ensuring accurate diagnostics.

The ITEQ Brake Fluid Liquid Tester Pen offers a fast, reliable way to measure water contamination in DOT3 and DOT4 brake fluids using 5 LED indicators. Compact and battery-powered, it delivers results in seconds with clear color-coded alerts, helping you maintain brake safety and avoid costly repairs. CE and RoHS certified, this tester is an essential tool for proactive vehicle maintenance.

Specifications

ASIN	B076SC377J
Batteries	1 AAA batteries required.
Brand	ITEQ
Customer Reviews	4.4 4.4 out of 5 stars (3,806)
Date First Available	26 December 2017
Item Weight	40 g
Item model number	BFT1001
Manufacturer	ITEQ
Manufacturer Part Number	BFT1001DOT4
Product Dimensions	15 x 1.5 x 1.5 cm; 40 g

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