Seems that the key hasn't been able to communicate properly with the car for all that time. The spare that I have been using for the past 2 years can open and close doors but receives the message (keyfobs not detected) and has a 1 in 8 chance of not starting the car Do you think it is the car battery being the culprit ? Jun 13, 2016 · Both say be very careful in selecting the battery -- must be a real Panasonic VL2020, and not the CR2025, ML2020, etc. The "pro" said go with the 180 degree leads, modify both leads, and solder on a short piece of wire to one lead not the battery itself to prevent heat damage (see his pics). Jul 14, 2010 · 4) Check Fuel Pressure. 5) Check Injector Pulse. 6) Fuel Pump Relay. 7-9 are usually found when checking codes. 7) Crankshaft Position Sensor. 8) Camshaft position sensors Intake and Exhaust. 9) Re-sync key (Instructions can be found in the forum) or Message me and I will give correct instructions. And the list starts right on down the line Nov 14, 2015 · When you add up the costs - $10-$20 for the battery, $20 for soldering iron, $50 for empty shell, $50 to laser new key + hassle of trying different things - it would have been almost cheaper and much less stressful and less hassle to just bite the bullet and get a new key from the dealer at cool $225. In the end I ended up buying a new key from Nov 24, 2021 · A quick video tutorial on how to change the remote fob key battery for a 2014 - 2023 BMW X5.When Should You Replace The Remote Fob Key Battery In Your BMW X5 Aug 11, 2022 · Techniques for opening the BMW boot that won’t open are as follows:-. Open the BMW trunk with the key blade. Manually open the BMW trunk. Charging of the car battery. BMW valet switch on/off. Reconnect the broken wiring loom. Replace the worn off parts. Replace the BMW key fob battery. Above are some techniques you can utilize to open the car Oct 9, 2023 · Replacing the battery on a BMW is expensive because you need a new and registered battery. A BMW battery replacement range typically costs $400-$500. Before you spend hundreds on a new battery, we recommend using a trickle battery charger to bring the battery back to life instead of jump-starting the car and letting the alternator charge the uFCfq83.

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