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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I was driving my 2003 Nissan Altima and the roads were wet due to rain. I came off an exit ramp and pressed on brakes to slow down because there was a red light. My car started to skid and it veered left and right. I gained control and pressed on the brake as hard as could and I felt the brakes l...

My Nissan 03'cranks but won't start .I have replace both cam And coolant sensors and still no change please I need advice

Car was throwing code p0303 which said consisted of cylinder 3 I changed the spark plug for that cylinder still did it. Then I took the coil off of cylinder 2 and swapped it with cylinder 3 hoping it might throw the code to cylinder 2 once I cleared the codes. But after clearing codes its throwin...

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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.

I have 2003 Altima with 90,000 miles.All the sensors are going bad or something the dealer told me. Replace the vec. sensor and the speed sensor and it is dtill messed up.I ws told now do the ECM and TCM whatever that is now. Will not buy another one!

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...

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