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Hey, I recently bought a used 2005 Honda Civic SE Coupe and it is in fine running condition other then three problems that I have with it. I had gotten a new audio system installed and after that my lights on my Automatic gear shift won't turn on and neither will my Air Conditioner Light, and Rear defroster and such. Another problem is that my power locks don't work, it works on my passenger door but not on my driver side which in't a major problem but I am just curious and lastly, this is the problem that I am most fearful of and that is that I have recently developed a rattle in the engine on low RPM's and especially on idle. Now this problem just developed within the pas two weeks and I didn't have it while I was driving this car for the past 4 months. The rattle doesn't have a pattern to it and you can hear it while standing outside the vehicle. I have some videos of the sounds and every time I bring it to the mechanic, well, there is no rattle of course, just my luck right? :P But I am hoping someone can help me with this issue because the rattle becomes quite bothersome. Like I said before, it isn't consistent and doesn't happen all the time maybe every 2nd or 3rd day and it is only on low RPM's and Idle. The car has 167,000 KMS on it and the engine specs are (and it's automatic):
Engine 1.7L L4 SOHC 16 valves
HP (hp@rpm) 115 @ 6100
Torque (lb.ft@rpm) 110 @ 4500
Drivetrain Front-wheel drive

Cheers guys, I hope to get a reply soon

Zach