The tester can be used as a digital brake fluid tester suitable for determining brake fluid quality. Developed for professional use in astomotive repair shops and in servicing. Quality is tested and included on five LEDs in terms of “per cent of water in the brake fluid . “
Ready for Brake Fluid Test
Unscrew the brake fluid reservoir, and pull off the cap of the Brake fluid tester.Dip the test probes into the brake fluid up to the plastic rim of the device.
To check Fluid Quality
Press the button for power on, green LED will light up. Insert the tester into reservoir for one second then the tester result will be correctly indicated by LEDs.Repress the button for power off. The tester will automatically power off after about 15 seconds of inactivity.
Tester Specification:
1. To check the quality of brake fluid quality
2. 5 LEDs to indicate percentage of water in the brake fluid
3. Automatically power off
4. Operated by a LR03 AAA 1.5V battery (Not included)
Tester Instructions:
Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance. Red indicates the brake fluid needs immediate replacement, green represents good condition, yellow indicates the state is acceptable but soon replaced.
1. the green LED lights = water content in the brake fluid H2O <1.5%, brake fluid qualified
2. the yellow LED lights = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later
3. the red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced Red LED: change brake fluid
Tester Features:
Five LED indicators show the test results more accurate.
Testing DOT 3, DOT4, DOT5 brake fluid
Press the switch to turn on the power, the green LED light that represents the battery properly, the green light does not shine on behalf To replace the battery
Automatic shutdown
Technical parameters:
Green: Battery OK, that is, brake fluid does not contain water
Green / yellow: brake oil in water content of less than 1%, better brake fluid performance, ease of use.
Green / yellow / yellow: brake oil in water content of about 2%, brake fluid can continue to use.
Green / yellow / yellow / red: brake oil in water content of about 3%, the proposed replacement of brake fluid.
Green / yellow / yellow / red / red: brake oil in water content of at least 4%, the brake fluid must be replaced immediately responsible for very dangerous.
Attention:
1. Replace battery if the gree LED not light up any longer after you press power on button. Wash the test probe with tab water after use.
2.In case of skin contact with brake fluid, thoroughly wash the affected skin or clothing with water.
3.Do not expose brake fluid to the atmosphere for a long time as the fluid is highly hygroscopic!
Packaging List
1x brake fluid tester
【Protects You&Your Car】Check the health status of DOT3, DOT4 car brake fluid, Brake Fluid Tester Pen can be used as a digital brake fluid tester suitable for determining brake fluid quality. It will be safe for your driving
【Easy To Use】 Press the button , Insert the tester into reservoir for one second then the tester result will be correctly indicated by LEDs.Repress the button for power off.
【5 LEDS】5 LED display lights the percentage of moisture content in the brake fluid, as the test results are more accurate
【Usefull】Supports DOT3 DOT4 DOT5 brake fluid .
【Easy To Carry】Small size ,you can take it in pocket , take 1 AAA 1.5V battery. automatic shutdown after about 15 seconds of inactivity
Airbag Scan/Reset Tool B800 for BMW Fit E36 E46 E34 E38 E39 Z3 Z4 X5 eBaydiy Tools
$25.99
16 Pin OBD 2 OBDII Male Connector OBD2 16 pin Adaptor J1962 Connector OBDII Plug with Screws Car Diagnostic Cable Connector (OBD Male Plug) eBaydiy Tools
$7.99
Brake Fluid Tester, Auto Brake Liquid Diagnostic Testing Tool, Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Checker Tool for DOT3 DOT4 eBaydiy Tools
$9.99
🚚 Free Shipping on orders over $75+
📦 Arrives: Mar 20 - Mar 22
🛡️ 2-Year Professional Warranty Included
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Additional information
| Brand | BSBMIEQM |
|---|---|
| Material | Semiconductor, Lightweight Material (e.g., Plastic) |
| Item Weight | 2.4 ounces |
| Style | Modern |
| Maximum Supply Voltage | 1.5 Volts |
| Measurement Accuracy | High |
| Measuring Range | 0% to more than 3% |
| Output Type | LED |
| Response Time | 1 seconds |
| UPC | 742404205321 |
| Manufacturer | BSBMIEQM |
| Package Dimensions | 7.32 x 2.28 x 0.83 inches |
| ASIN | B0CX44F4T7 |
| Item model number | 00-1MPO-ZBL9 |
| Date First Available | March 5, 2024 |


Badbob –
Works well at a good price.
I tested it first with a resistance decade box (I’m an electronics nerd) and it seems to do something reasonable. Next, I tested my brake fluid. The lights shot right into the danger zone! No great surprise, I guess. The fluid is 16 years old. Next step is to get it changed.I tested it on a new bottle of DOT 4 and it showed good.Conclusion, this thing works fine for something less than $7. There are much more expensive versions, but what more would they do?Gripe? Battery holder needs work. Oh well.
SirchainsawCharlie –
This is a great tool that makes money
This tool makes me money for such a small investment. Contamination of brake fluid from moisture is not good. I’ve seen components corrode and break on older vehicles. I’ve pressurized vehicles and bledd bleeder screws that have not gotten regular brake flushes and the moisture content is almost always present I’m the master cylinder after using two or three quarts and the fresh fluid. usually the fluid in the master cylinder stays dark in color and I’m telling you, the fluid coming out of the bleeder screws looks clean. I’m going to begin testing the fluid coming out of the bleeder screws if they are convenient to catch and if the environment isn’t excessively humid. Anyways, the way I test the pen is test fresh brake fluid in a small sample then spray a mist of water with a sprayer bottleand monitor moisture ratings with the pen. I understand you can test brake fluid with a multimeter as well but this is so cheap and convenient. This brake fluid tester and then a good flare wrench set and l maybe even offset/modified offset wrenches just in case could be good for not having to remove a tire to open bleeder screws on vehicles equipped with electronic parking brake systems. I’m paid .5 labor which means the tool pays for itself after the first brake flush, so it’s a heavy hitting money tool. It’s very good guys and gals. Like an amazing tool. I like to purchase a new one every few months cause I basically test every vehicle during regular maintenance. Once it’s 4% or more then I suggest doing the maintenance. I’ve noticed vehicles who have regular flushes then the master cylinder is usually able to stay clean and keep moisture saturation low. There’s only one vehicle I tested that had absolutely perfect brake fluid inside the master cylinder which happened to be a Mercedes that likely recently had a brake flush. I was impressed.
Elliott51 –
Good brake fluid Tester
Brake Fluid Tester arrived on time. Quality is decent and price is very reasonable. It is very easy to use and get the moisture content reading which I believe is in acceptable range. Only con is the battery cover. You have to use a mini flat screwdriver or a knife to open the battery cover. I would have given it a 5-star review if opening battery cover was easy.
John Michler –
Brake fluid tester review
I found this tester brake fluid tester does a good job. I tested two of my vehicles.I performed the test on my newer Toyota, and it did not need new brake fluid as it read at most 1% water content. My older Toyota, and it read in the 3%~4% zone noting it needs to be changed.This tester gives me a good idea of how my brake fluid is doing.- I found it to be easy to use- I found it alto be accurateYou can see my full video on my YouTube channel (search YouTube for this product name review)
Bob –
This tester doesn’t work
This tester doesn’t work, don’t waste your money.I was excited about getting one of these brake fluid testers for the first time, and at $5 and change you can’t go wrong right, lol, wrong.Tested in old fluid, works, tells me it’s badBut wanted to be sure it wasn’t just always reading that.Took an opened new fluid container and poured some out in a cup and tested, bad …Ok, maybe it was, it had never been used, but whatever, I went and pulled a never opened container off the shelf, pulled the seal under the cap off, poured some in a cup, exact same reading, bad, all the lights, now I’m stuck with a tool that’s not worth the gas to drive to the UPS store for the return 👎Don’t buy it, it’s junkOh, and as others here have wrote, brake fluid washes the writing off the side…. Of a brake fluid tester 😄 you can’t make this upUsed once, and it was washing the L off, if you’re not careful everything will come off, I’m pulling the battery and throwing it out.
WeisGuy2 –
Worth buying
I bought this knowing I had some brake work coming up. I also had 2 other vehicles that I wanted to check before I did a flush (as it’s extra work if not needed).The brake fluid I was replacing registered bad (4% water) on the tester. Interestingly enough, the new brake fluid tested at 1% out of the bottle, which is still safe to use, but a little concerning for new fluid. But it was a brand I got for a good deal and usually don’t use.I tested my newer truck and it tested good. My other vehicle, a little older, also tested at 1%. So that saved me time and money on the fluid change.If I test another new bottle of fluid from the popular brands, I will try and update this review so you can know the results. However, this is a review for the tester, not the fluid. So really, buy the tester. It won’t be used often probably, but it’s cheap and it could keep you safe if you find you have a lot of water in your brake fluid.
James H. Strubb –
Brake fluid tester.
Yes, works well, seems accurate.
Dan Nguyen –
Passed my tests
Bought this awhile ago but didn’t get to use it until this weekend. The results were consistent with what I expected- Tested on a 19 year old car 189K miles never had brake fluid change. It showed yellow > 2%. Good. I changed the fluid.- Tested on a 7 year old car 72K that never had the brake fluid change. It showed green. OK, but i will change the fluid soon.- Tested on 2 old dot3 fluid bottles i bought +5years ago and both showed yellow >2% . The bottles still had tight seals on but some how moisture still got in. Didn’t want to take a risk on old fluid so I threw them in the oil recycle bottle.- Tested on new dot3/4 fluid i bought and it showed green which is expected.
Mario viveros –
Muy buen producto
Svt –
Does not look like picture as advertised. You would have to use a sharp edged knife or something to open it. I am sending it back due to other comments about the battery cover and the inaccuracy of this product. Obviously a piece of garbage and not worth buying. The well-known YouTuber who suggested this will be contacted to tell him about his poor product suggestion