Review on 🚗 Xpress DX345 Car Alarm: Programmable Hijack System, Trunk Release, Auto Central Lock, 3-Channel Alarm System by Jim Bijelic

I bought this system a few months ago and just got around to installing it. I needed a simple door lock/unlock controller with no alarm functions. I also have a Crimestopper RS4-G3 which is great for this purpose (5 stars) but I was concerned that two adjacent systems might interfere so I bought something else. My 1990 BMW 735i (e32) has a positive locking system so I needed two relays to activate the pulses. never mind I only connected four wires to the box, +12V, ground, lock and unlock. I don't need a security system and I find that with an immobilizer it causes more problems than it costs and I didn't have to flash the lights. The locks on this car are pretty loud *KLUNK* Everything was going smoothly until I plugged it in. The machine jammed immediately and the internal relay clicked every second. Sometimes I was able to stop it by connecting the side door sensor wires. It worked fine for a few minutes and then suddenly crashed again without responding to the remote with a relay click. I disassembled the box and found that the vibration sensor is a suspended piezo element with a spring on the end. This. I didn't need it and it could only cause problems, so I removed it. There is only one relay and that is for the turn signals. I removed these too. And now the system works great! It seems that the piezo vibration sensor was too sensitive and reacting to relay clicks. After I removed the piezo the problem went away. Looks like he went into protect mode and locked the car. If I had a speaker plugged in, I'm sure I'd be enjoying some comfortable music during lockdown. I only pulled the relay because it was the only other mechanical part on the board and was just another point of failure that could cause phantom current and kill the battery. The relay also clicks a few times when locking/unlocking to signal receipt of a command, which I found quite annoying. It required some simple modifications but is perfect for what I wanted. The remote controls are very high quality and have a real brushed metal surface. The range is very good (6 large vehicle lengths) if the receiver is mounted on the electrical box under the rear seat.