Two problems related to manifold/header/muffler/tail pipe have been reported for the 2003 Oldsmobile Alero. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Oldsmobile Alero based on all problems reported for the 2003 Alero.
My lower intake manifold is leaking just as is popular on these types of engines. Also my turn signal is working off and on. I have sent letters to gm with no response or success.
2003 Alero ignition shorted causing consumer not be able to start vehicle, also found a leak in intake manifold gasket. The passlock sensor in the ignition cylinder shorted and as a result the vehicle would not start. The intake gaskets and oil drive o-ring leaked. The dealer replaced the lower intake manifold gasket, rocker cover gaskets and oil pump driveshaft cover seal. The air bag cover warped. The top of the dash was wrinkled and the instrument panel pan was peeling from it's backing. The dealer replaced the instrument panel assembly and transferred all components.