Normally these new Is and Ls are equipped with a amplifier where you have to replace or program. You have two options either go tot the dealer of your warranty is still valid and do not tell them that you replaced the battery as they will charge you. Or go to Shahzad in sharjah behind yasmine building and pay 400 -600 dhs to reprogram it .
Good luck
You will have to replace the brake pad sensor, see where the brakes were really worn out and then replace one of them. You only have two on the car and on the passengers side. One in front and one in the back.
Good luck.
The Vehicle you bought must have changed from stock to sport suspensions. As you mentioned its a used car so you do not know the history of the previous user. Change the front shock absorbers to avoid the bumpy ride. Chintan' is right use the shops he has mentioned.
All the best.
The headlamp Connector failed for sure due to an After market lamp. Change the lamp and insulate the wires.
http://www.sylvania.com/ConsumerProduct ... mentGuide/
Check the right voltage lamp for your car via this site.
All the Best.