siren does not always mean your turbos are going. plenty have had described that sound for a long time with no turbo failure. early into driving the other day i noticed the siren sound actually, only 26k miles, and my turbos are running strong and healthy. dont jump to conclusions. and IF yours are failing, get RB's instead of the stocks again.
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07 335i- SOLD, and will be missed...
Parts for sale- PWM meth kit, M steering wheel, M shift knob, perforated e brake handle
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