Horande Replacement Key Battery VL2020 Fit for BMW 1 3 5 6 7 Series E90 E92 E93 Entry Keyless Remote Smart Remote Contril Key Fob

For those people who install and the fob still does not work. You should try to find a procedure for your car to Re-initialize the key with the car. I had the same problem. I thought my fob is not working with the new battery. But I had to initialize it to my Mini with few steps with the ignition.

If you do not have a soldering iron and can solder 1/2-way decently, this is not the battery for you - and you need to have someone who fixes cell phones swap your battery out. IF you know how to solder, the entire process takes about 15-20 minutes and the battery is a perfect match. The pins are polarized / keyed (meaning: one is pin-style, the other is blade-style - which means you cannot accidentally install the battery backwards - the pin/blade perfectly match the original battery posts which get soldered the circuit board). You will need to take a razor (utility knife) and start separating the original key fob on the key end, then gently separate the case halves w/ a small flathead screwdriver (the case halves are glued together - so either be prepared to re-glue them w/ superglue, or better yet - pay $12 and get a brand new key fob case (which snaps open/closed) - search Amazon for the description listed below). Desolder the old battery and resolder on the new one ... the battery will likely come UNcharged (dead) and you will need to put it in your key fob socket and drive around for 30 minutes to charge it. There is also a Youtube video which shows this process. new key fob case (includes BMW logo): "(Just a key Shell) NEW Replacement Car Smart Key Keyless Entry Remote Key Shell Case for BMW 525i 325i M6 M5 650i 550i 128i 135i 328i 328xi 330Ci 330xi 335i 1 3 5 7 X5 X6 KR55WK49127"

Worked perfectly

works great

The title says it all, I’m very pleased with this purchase. No modifications we needed to the tabs, they were 90° and fit the circuitboard holes just fine. Also, the battery arrived well-charged with 3.09v. I plan to order a second battery for my other key. The accompanying photo shows the new battery fully and installed onto an E46 diamond key fob circuit board. I’m a novice at soldering, but it was simple and took less than 10 minutes start to finish (excluding gluing the fob shell back together and pairing to my BMW).