1995 BMW 525i No Start After Water

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KELLEYRG2001
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  • 1 POST
My son ran into a puddle at the lower door level, some water wet into the back seat. The 525i initially stalled but started back up immediately. It ran rough for a day and the O2 sensor was damaged and replaced by BMW dealer. About one month after the water incident the car began failing to start Intermittently. All lights on the dash come on but no sound at all when you turn the key. Initially if I waited between 1-12 hours it would re-start. Now it will not start at all.The windows would initially fail and if that happened then it would not re-start. I noticed that across from the back seat there is a black electrical box with lots of fuses and wires going into it. If this was exposed to water is the car totaled? Is it worth fixing a 95, 114K miles car. My fear is that the diagnostic costs from the dealer may be cost prohibative and the problem may be unrepairable. If totaled is there some means to sell the car, because if it start it has a good engine suspension and brakes.

Frustrated, any advice would be greatly appreciated.
Nov 13, 2006 at 1:41 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,658 POSTS
yes, it does sound like you have water damage. The cost can very greatly from a simple bad connection to main wiring loom replacement, take your car to a auto electric to get a estimate on repairs, then you can see if the car is worth it to you.
Nov 15, 2006 at 8:51 AM

Suggested Repair

Have an auto electrician inspect for water damage and estimate repairs. The fault may be a bad connection or, in a worse case, the main wiring loom; compare the estimate with the car's value before authorizing further dealer diagnostics.

Conversation Summary

A 1995 BMW 525i stalled after driving through water that reached the rear seat, then ran roughly and had an oxygen sensor replaced. About a month later it intermittently failed to crank with dash lights on and no starter sound, and it now will not start at all. Window failures sometimes preceded the no-start. The expert says water damage is likely and repair cost can range from a bad connection to main wiring loom replacement, so an auto-electric estimate should guide whether the car is worth fixing.

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