2003 Nissan Altima Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Nissan Altima

The engine may stall at times due to a failed crankshaft position sensor and/or camshaft position sensor, These sensors can fail intermittently as they warm with the engine. Sensors on certain models have been recalled by Nissan and will be replaced as necessary. Please visit our recall section for this model to see if your vehicle is covered by this recall.

The external seal on the engine oil cooler can fail and create an oil leak.

The catalytic converter closest to the cylinder head can fail causing illumination of the Check Engine Light. Prompt repair of this problem is recommended because the catalyst material can be sucked into the engine and cause internal damage.

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We took it to Pep Boys and they replaced about 800 dollars of stuff but afterwards the engine light came on and white smoke was coming out of the tail pipe. We took it back and they said we needed to replace some valves for another 300 plus dollars. We then took it to Nissan and they told us the ...

Radiator had busted before and I changed it, and I also changed Serpentine belt cause it was slipping a little, and it still is could that be the problem? I also changed Thermostat but no change still overheats!!! Could it be water pump? Help please !

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The engine coolant temperature can vary at the coolant sensor due to its unique location. If these variations are large enough, a brief interruption in the signal output from the sensor may occur. If the signal interruption is so brief that the electronic control module (ECM) logic does not have time to diagnose the condition, the engine may stop running without warning. This condition will commonly occur only at low speeds. If the engine stalls without warning, a crash may result. Dealers will reprogram the ECM to correct this concern. The Nissan recall number is R0606.

Nissan is recalling 2002-2003 Altimas in cold-weather states because in extremely cold temperatures, moisture in the fuel tank could freeze and form ice crystals, which may obstruct the suction opening of the fuel pump. This can prevent the supply of fuel to the engine and cause the engine to stop, which could result in a crash. Dealers will install a screen at the suction opening of the fuel pump.

ON CERTAIN VEHICLES EQUIPPED WITH THE 2.5 LITER ENGINE, THE EXHAUST PIPE HANGER PIN MAY CATCH DEBRIS FROM THE ROAD THAT COULD BE IGNITED BY CONTACT WITH THE MAIN CATALYST.

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Nissan is a lousy company when it comes to treatment of its customers and build of their product.

2003 Altima 3.5L SE V6 - catalytic converter went out at about 100K and got sucked up into engine resulting in later engine failure. Cost $7K to replace engine. This is common with the 2.5 4-banger so what happened to me? Also, before engine began to fail I had a rattling noise in the engine which turned out to be the timing belt tensioner. I wasted $2K getting this repaired on what later becam...

This car has worked amazingly well with minimal maintenance and I just love my car. The only thing is that the car gets between 20-24 miles to the gallon.

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