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Old 08-31-2011, 09:01 AM
dtc100 dtc100 is offline
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Location: Norcal
Join Date: Jan 2011
Posts: 4,694
Mein Auto: 2011 328i
Originally Posted by sunny5280 View Post
A common troubleshooting methodology is to substitute / replace parts suspected of causing a problem in an effort to eliminate them or fix the problem.

When I bought my current X5 the SEL was illuminated. Before purchasing I spoke with my indy about the possible causes for the code that was set. He said it could be spark plugs, coils, CPS, vacuum leak, and a couple of other things. He couldn't say exactly what the fix would be because there were a number of things which could cause the problem.

After giving him the OK he set off using a methodical approach of investigating each of these items in an effort to resolve the problem. First up was replacing the spark plugs. Didn't solve the problem. The next was swapping coils (code was an engine misfire on a couple of cylinders). That didn't work. The next step was to swap the CPS. That didn't work. Then he started looking for vacuum leaks.

And what did he find? The oil separator hoses had become mushy and split which exposed the system to the atmosphere. Now I could have said "No, don't replace them because the first three things you tried didn't work so I have no faith replacing these hoses will solve the problem". But I didn't I authorized him to replace the hoses and the problem was fixed.

My point? The procedure being used by the dealership is common and not a reflection of the competency of the service facility (assuming they're replacing parts related to the specific issue).

Yes. If the wiring is damaged it needs to be replaced regardless if it ultimately turns out to be the problem or not. Just like the oil separator hoses on my X5. Regardless if they were the problem or not they needed to be replaced.
I would take the car to a indy shop for a second opinion before handing over the $2K. But even before that, I would seek legal advice.

The repair dealer continued to find defective parts and fixing them, until they found a reason not to fix under the CPO warranty. A lot of codes were thrown during the repairs. Did the selling dealer not find any of the issues when they CPOed the car? Would you trust the selling dealer at this point?

If not, why should you trust the repair dealer without seeking a second opinion?
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