I have a bmw 318is 1999. I keep gettin a metallic rattle from under car. I checked exhaust and anythin thats loose underneath,still cant find anythin.
Can you help.
Take a close look at your springs. My 99 Audi A4 had a creaking rattle that happened when I went over a speed bump or dip in the road, and it turned out the bottom of each rear spring was broken. I replaced them and the noise went away.
Another possibility would be the sway bar end links. Since the sway bar is worked pretty hard, the bushings in the end links will wear out eventually. This can cause some clanking. Look behind the wheel hubs - you should see a short bar or bracket attached to the hub at one end, and to a bar at the other end. The bar will go forward or back a short way, and then across the bottom of the car to the other wheel hub. That's your sway bar. The bushings in the end links (the short attachment bars that anchor it to the wheel hub) or in the body brackets (some cars bold the center of the sway bar to the body with a bushing in a bracket) could be deteriorated and allowing the bar to bang around on the body.
Finally, take a look at the suspension itself. Do any of the bushings where various parts meet appear to be cracked, leaking fluid, or gone entirely? There should be no gaps between any suspension pieces at the points where they meet. If there are, you're missing some bushings and may well have found the source of your noise.
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i have same problem and same car
ive found 2 things today i found the covers to the frond disc brakes get coroded real easy and mine made a loud tinny rattle so i took them off
also i saw underneath around the sencer screwed into the exhaust just behind the front wheels when you tap it that also makes a rattle and there is a metel cover around it as its the hottest part of the exhaust so im thinking thats come loose hope this helps you :-)
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