--- product_id: 460185734 title: "BY-J Car Blind Spot Detection System, 24GHz Millimeter Wave Radar Sensor Blind Spot Monitoring System Kit, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System" brand: "by-j" price: "₱18590" currency: PHP in_stock: true reviews_count: 2 category: "By J" url: https://www.desertcart.ph/products/460185734-by-j-car-blind-spot-detection-system-24ghz-millimeter-wave store_origin: PH region: Philippines --- # 24GHz millimeter-wave radar LED + buzzer alerts 98ft detection range BY-J Car Blind Spot Detection System, 24GHz Millimeter Wave Radar Sensor Blind Spot Monitoring System Kit, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System **Brand:** by-j **Price:** ₱18590 **Availability:** ✅ In Stock ## Summary > 🚦 Drive smarter, safer, and ahead of the curve with BY-J’s radar-powered blind spot guardian! ## Quick Answers - **What is this?** BY-J Car Blind Spot Detection System, 24GHz Millimeter Wave Radar Sensor Blind Spot Monitoring System Kit, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System by by-j - **How much does it cost?** ₱18590 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/460185734-by-j-car-blind-spot-detection-system-24ghz-millimeter-wave) ## Best For - by-j enthusiasts ## Why This Product - Trusted by-j brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pro-Grade Alerts:** Visual LED indicators plus audible buzzer ensure you never miss a potential collision risk. - • **Precision 24GHz Radar:** Cutting-edge millimeter-wave tech scans blind spots up to 98ft away for unmatched safety. - • **Universal Compatibility:** Fits most sedans, SUVs, trucks & RVs with soft rear fascia—upgrade your ride without a full vehicle overhaul. - • **Dynamic Dual-Sensor System:** Left and right rear sensors activate with turn signals, delivering real-time lane change warnings. - • **Multifunctional Safety Suite:** Combines Blind Spot Detection, Lane Change Assist, and Door Open Warning for comprehensive protection. ## Overview The BY-J Car Blind Spot Detection System leverages advanced 24GHz millimeter-wave radar technology with dual sensors to monitor blind spots and adjacent lanes up to 98ft away. Designed for universal fit on most 12V vehicles with soft rear bumpers, it integrates blind spot monitoring, lane change assist, and door open warnings, providing LED and buzzer alerts to enhance driver awareness and reduce collision risks during lane changes and parking maneuvers. ## Description Buy BY-J Car Blind Spot Detection System, 24GHz Millimeter Wave Radar Sensor Blind Spot Monitoring System Kit, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System: Radar Detectors - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Great product - I purchased this Blind Spot Radar Sensor to install in my 2014 Honda CRV. The 2014 CRV does not come with the latest side lane vehicle detection sensing system. However, my car has very low mileage(60k miles) and very well maintained. I was under pressure to spend over 35k+ USD to upgrade a new car purely because lacking the radar sensing, which does not make sense at all. When researching online, I was lucky to find the BY-J brand selling the part for the blind spot detection. I was not sure whether it would work or not. From the review, some says it works, and some says it not. I decided to take a risk and give it a try. I called and confirmed my car shop won't do this non-standard part installation for me(kind expected). So I hired my home handyman, who have never done car repairs for customers( Later I learned some local "car stereo" shop may do this type of work). I am prepared to throw few days to fix this step by step. The handyman helped open the rear bumper, installed per the instruction manual to connect the light signal wires, and cut some metal in the bumper to install the radar. Connect the line to the under the hood battery and give it a try. It lights up and the beeper sounds when make a turn when vehicle drive by! However, it is not consistent. After 5 miles drive, radar not working. And interestingly, when we disconnect the battery and try again, it works. We know something is not installed correctly, maybe connect to the battery is an issue(we know nothing about how to connect to fusebox at all , aka "ACC" port in the manual). Then I made another great decision, instead of trying out randomly. I contacted desertcart customer service and have them connect to the vendor(Chinese vendor). We used wechat and the customer service is really stellar. Within few days we were able to get good advise from the technical expert. Who reminded us that the key maybe the brown line connect to the reverse light. It should be disconnected per the specific model we purchased. He also sent great videos on how to connect to the fuse box right under the driving wheel. (ACC means only on--suggest >10Ampere current after starting the car, and off when turn off the car. Simply test few fuse box and pick one, that easy! If we try our original way to connect to the battery directly, it will always on, drain the battery and is not the right way to do it). Anyway, in the second trip, the handyman tried (1) disconnect the reverse parking line (2) Connect to one of fuse box ACC port(ACC is a generic term, you really don't need specific car's manual to find out. Simply test it!). It works beautifully and very predictable for at least 1 week now. I will update later if there is reliability problem but if not then means the part is very reliable. Total cost me about 1.5 day US labor time to get it fully working(for someone very inexperienced in car like us). Several things are really work highlighting: The customer service is stellar, do not fear about the installation. Give yourself some time on this project and leverage their experience. I think installation would not be an issue if you dedicate some time. Make calls to local car stereos or other shops and find the one who can do this type of work. Worst case, ask your handyman and spend time to try out. I am very happy about the experience and thus want to give it a 5 star rating. It deserves it. Some notes to the seller: (1) Part cost probably is not the biggest issue. Make sure follow up each case and the customer is successful. Spend time to modify the installation manual(link to videos, or open a Youtube channel purely on videos related to how to install this.) In the US market, you may spend $200 to buy the part, but over $1000 to install it. Smooth, happy installation is the key to get great reviews and make the part popular. (2) Consider some tape springs, basically think about the difficulties how to install this units on bumps and find easy ways to fix it. Not everyone has the luxury to cut bumper metal to install it. (3) Future product can consider wireless+battery, that would make the line connection a lot easier. I hope this review can help someone who is on the fence to buy this product. Jason Review: My experience so far is that it’s not a reliable system - I’m sharing my experience so far. The system is not consistent in its detection of cars and trucks. It detects car about 80% of the time and trucks (track trailer) about 10% to 20% of the time. So far, I can’t rely on its results to make a safe lane change. ## Features - [Blind Spot Detection System] This 24GHz Ultrasonic Radar Sensor Blind Area Detection System is a vehicle assistance device that greatly helps you detect the possible collision risks in the blind spot during driving. - [Double Microwave Radar Sensor] High-speed frequency sensors for the left-rear and right-rear of the vehicle. The BSD system is activated with the turn signals, whenever there is a moving object pop into the rear of the vehicle, with the aid of LED lighting on, blinking, buzzer sound so that the driver can be cautious when lane changing to avoid the possibility of side crash accident. - [3 Major Functions] This Blind Spot Sensor integrates BSD-blind spot monitoring, LCA-parallel lane change assist, Dow -Open Door Warning (optional two doors) 4 functions to help detect the possible collision risk. - [Long Detecting Distance] The system uses a 24GHz millimeter-wave radar sensor chip, uses single transmit and four receive radar antennas, is equipped with sophisticated computer algorithms, and automotive-grade quality waterproof plugs, with a detection range of up to 98ft, can monitor the closing objects in the neighbor lane within a range of 26ft with speed gap over 0.5m/second. - [Blind Spot Warning System] when the car behind us is stationary after stopping, there is no alarm for the blind spot; when the car behind us is slower than us, there is no danger of collision and no alarm; likewise, when we overtake, we are faster than the car behind us and there is no alarm. - [Important Notes] This system integrates blind spot detection and reversing assistance.This item fits for most DC12v sedan, compact, SUV, MPVs, pickup etc, doesn't suitable for vehiche with metal bumper, and professional installer installation is required. - This Radar Blind Spot System is an OEM-grade universal solution that will only function on vehicles with a soft rear fascia. This product cannot function through metal bumpers. - Customer Service: If you encounter any problems during installation, please do contact us. We will provide you with the most professional customer service ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09VDMHTD7 | | Best Sellers Rank | #165 in Radar Detectors | | Brand | BY-J | | Compatible Devices | Car | | Customer Reviews | 3.4 out of 5 stars 6 Reviews | | Display Type | LED | | Frequency Bands Supported | 24GHz | | Item Dimensions L x W x H | 9.45"L x 6.7"W x 3.94"H | | Manufacturer | BY-J | | Mfr Part Number | 24GHz 053 | | Power Source | Corded Electric | | UPC | 739722614515 | | Voltage | 12 Volts | ## Product Details - **Brand:** BY-J - **Compatible Devices:** Car - **Display Type:** LED - **Frequency Bands Supported:** 24GHz - **Power Source:** Corded Electric - **Product Dimensions:** 9.45"L x 6.7"W x 3.94"H - **UPC:** 739722614515 - **Voltage:** 12 Volts ## Images ![BY-J Car Blind Spot Detection System, 24GHz Millimeter Wave Radar Sensor Blind Spot Monitoring System Kit, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System - Image 1](https://m.media-amazon.com/images/I/618WyRJIeZL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by J***N on June 11, 2026* I purchased this Blind Spot Radar Sensor to install in my 2014 Honda CRV. The 2014 CRV does not come with the latest side lane vehicle detection sensing system. However, my car has very low mileage(60k miles) and very well maintained. I was under pressure to spend over 35k+ USD to upgrade a new car purely because lacking the radar sensing, which does not make sense at all. When researching online, I was lucky to find the BY-J brand selling the part for the blind spot detection. I was not sure whether it would work or not. From the review, some says it works, and some says it not. I decided to take a risk and give it a try. I called and confirmed my car shop won't do this non-standard part installation for me(kind expected). So I hired my home handyman, who have never done car repairs for customers( Later I learned some local "car stereo" shop may do this type of work). I am prepared to throw few days to fix this step by step. The handyman helped open the rear bumper, installed per the instruction manual to connect the light signal wires, and cut some metal in the bumper to install the radar. Connect the line to the under the hood battery and give it a try. It lights up and the beeper sounds when make a turn when vehicle drive by! However, it is not consistent. After 5 miles drive, radar not working. And interestingly, when we disconnect the battery and try again, it works. We know something is not installed correctly, maybe connect to the battery is an issue(we know nothing about how to connect to fusebox at all , aka "ACC" port in the manual). Then I made another great decision, instead of trying out randomly. I contacted Amazon customer service and have them connect to the vendor(Chinese vendor). We used wechat and the customer service is really stellar. Within few days we were able to get good advise from the technical expert. Who reminded us that the key maybe the brown line connect to the reverse light. It should be disconnected per the specific model we purchased. He also sent great videos on how to connect to the fuse box right under the driving wheel. (ACC means only on--suggest >10Ampere current after starting the car, and off when turn off the car. Simply test few fuse box and pick one, that easy! If we try our original way to connect to the battery directly, it will always on, drain the battery and is not the right way to do it). Anyway, in the second trip, the handyman tried (1) disconnect the reverse parking line (2) Connect to one of fuse box ACC port(ACC is a generic term, you really don't need specific car's manual to find out. Simply test it!). It works beautifully and very predictable for at least 1 week now. I will update later if there is reliability problem but if not then means the part is very reliable. Total cost me about 1.5 day US labor time to get it fully working(for someone very inexperienced in car like us). Several things are really work highlighting: The customer service is stellar, do not fear about the installation. Give yourself some time on this project and leverage their experience. I think installation would not be an issue if you dedicate some time. Make calls to local car stereos or other shops and find the one who can do this type of work. Worst case, ask your handyman and spend time to try out. I am very happy about the experience and thus want to give it a 5 star rating. It deserves it. Some notes to the seller: (1) Part cost probably is not the biggest issue. Make sure follow up each case and the customer is successful. Spend time to modify the installation manual(link to videos, or open a Youtube channel purely on videos related to how to install this.) In the US market, you may spend $200 to buy the part, but over $1000 to install it. Smooth, happy installation is the key to get great reviews and make the part popular. (2) Consider some tape springs, basically think about the difficulties how to install this units on bumps and find easy ways to fix it. Not everyone has the luxury to cut bumper metal to install it. (3) Future product can consider wireless+battery, that would make the line connection a lot easier. I hope this review can help someone who is on the fence to buy this product. Jason ### ⭐⭐⭐ My experience so far is that it’s not a reliable system *by J***Y on September 17, 2024* I’m sharing my experience so far. The system is not consistent in its detection of cars and trucks. It detects car about 80% of the time and trucks (track trailer) about 10% to 20% of the time. So far, I can’t rely on its results to make a safe lane change. --- ## 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.ph/products/460185734-by-j-car-blind-spot-detection-system-24ghz-millimeter-wave](https://www.desertcart.ph/products/460185734-by-j-car-blind-spot-detection-system-24ghz-millimeter-wave) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-07-21*