If you have a battery post that looks like this, it may be keeping your Q7 from starting. Start by taking a look at the battery posts. If they are loose or corroded, it acts as a barrier that can keep the starter from getting the voltage it needs to crank the engine. Pressing buttons works some of the time, but not every time. Buttons can work when pressed in a specific way. One button works, and another does not. Replace the remote housing. Replace the car key fob. 2. Broken Locks. The cause of a key fob not working after a battery change might have nothing to do with the key fob. It only happens whet starting up the car from cold and it appears after few seconds of running it ( parked all night and you start it in the morning) There are no other symptoms ( like idling or weird noises) just shaking/shuddering for few seconds - no lights on dash - literally nothing. I have replaced all of the glow plugs ( genuine ones Q7 MK 1 Discussion - Q7 3.0 TDI Cold start problem - Experience irregular starting problem after car has been standing for about 12 hours. Need sometimes 4 crancks of about 6 secs each before engine starts. Battery is new. After starting a cloud of grey smoke comes out (unburned fuel) Have consulted three Audi dealers If the some lights come on but the Glow plug light does not come on you have a relay 109 problem. If NO lights come on, you have a power problem so start at the battery and start checking. The earlier cars had a bad problem with the main power relay which is numbered 109 in the relay panel. The original relay was black, and the updated one is gray. Starting problem. Our 3.0D has been having starting problems specially when the vehicle has been left standing for 18 hours or more. The engine will crank for up to 10 seconds before starting. This was reported to the dealer who said the problem was related to battery drain. If the battery was weak or being drained by accessories then starting We have now replaced the batteries in a number of Audi flip key remote controls, and they are particularly susceptible to losing touch with their car. So, if Audi Key Fob Malfunction | Push Button won't Start Audi | Audi a6 c7 | Key is not recognized. Hold against marked area on steering wheel | Audi won't start, Vay Tiền Trả Góp Theo Tháng Chỉ Cần Cmnd Hỗ Trợ Nợ Xấu.

audi q7 not starting after battery change