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2003 Buick Regal Problems

Find the most common issues based on 2003 Buick Regal owner complaints.
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Most Common 2003 Buick Regal Problems

The automatic transmission shifter may fail, or a wire may break near the shifter causing the ignition key to become stuck in the ignition lock cylinder.
The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.
The water pump may develop a coolant leak resulting in an engine overheating condition.
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0 Known 2003 Buick Regal Brakes Problems

2 Known 2003 Buick Regal Drive Train Problems

The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure contr...
You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be com...

4 Known 2003 Buick Regal Electrical & Lights Problems

The automatic transmission shifter may fail, or a wire may break near the shifter causing the ignition key to become stuck in the ignition lock cylinder.
Acid may leak from the battery at the cable connections, resulting in corrosion on the battery cable ends and in the battery tray. A Leaking battery should be replaced and the cables thoroughly cle...

8 Known 2003 Buick Regal Engine Problems

The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.
The water pump may develop a coolant leak resulting in an engine overheating condition.
The fuel pump may fail causing engine to stall and not restart.

2 Known 2003 Buick Regal Exhaust & Emissions Problems

The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P...
The crankshaft position sensor, ignition module, and/or powertrain control module (PCM) may fail resulting in illumination of the Check Engine Light with ignition system related fault codes stored ...

2 Known 2003 Buick Regal Heating & Air Conditioning Problems

The display on the heater and AC control panel may become dim or go completely blank. Our technicians tell us the control panel must be replaced to correct this fault.
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

1 Known 2003 Buick Regal Maintenance Problem

Contaminated brake fluid can cause problems in the brake system and it should be flushed every 60,000 miles.

0 Known 2003 Buick Regal Miscellaneous Problems

2 Known 2003 Buick Regal Suspension & Steering Problems

The high pressure power steering hose will commonly leak fluid; it should be replaced.
The steering may develop a clunk type noise from the upper intermediate steering shaft. Our technicians tell us that you should check with your local GM dealer to find out what the latest repair i...

21
Known 2003 Buick Regal Problems & Complaints

The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.
The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue.
The serpentine belt tensioner pulley may wear out. Our technicians tell us that in order to get a new pulley from General Motors you must purchase a complete belt tensioner assembly.
The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure contr...
The display on the heater and AC control panel may become dim or go completely blank. Our technicians tell us the control panel must be replaced to correct this fault.
The automatic transmission shifter may fail, or a wire may break near the shifter causing the ignition key to become stuck in the ignition lock cylinder.
The fuel pump may fail causing engine to stall and not restart.
The water pump may develop a coolant leak resulting in an engine overheating condition.
The steering may develop a clunk type noise from the upper intermediate steering shaft. Our technicians tell us that you should check with your local GM dealer to find out what the latest repair i...
Acid may leak from the battery at the cable connections, resulting in corrosion on the battery cable ends and in the battery tray. A Leaking battery should be replaced and the cables thoroughly cle...
The crankshaft position sensor, ignition module, and/or powertrain control module (PCM) may fail resulting in illumination of the Check Engine Light with ignition system related fault codes stored ...
The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P...
You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be com...
The high pressure power steering hose will commonly leak fluid; it should be replaced.
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
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