Question about 2003 BMW 325

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I have a piston 3 misfire and my check engine light is on

What is it going to cost to fix it, and can I fix it myself?

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  • Anonymous Mar 12, 2009

    I too am having the same proble. I ran a obdII test and p0300 series codes came up, most likely your coil may be bad, try switching them from another plug and see if it persists. Also check your air pump which works like an EGR Valve, this pump recycles emissions from intake in which can be the proble. My advice take car to dealer for code test, it is only 75 dollars and can pin point problem then start replacing parts otherwise you are second guessing!!

  • Jeff Hammack
    Jeff Hammack May 11, 2010

    I have a 2006 325i, I have been working on all makes and models of cars for the past 30+ years. It is my strong recommendation that you take it to your local dealer, BMW parts are too expensive to guess with

  • Rob
    Rob May 11, 2010

    Sorry to say, but without knowing the cause of the problem, its hard to know hom much it would cost to repair or if you could do it on your own,

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My jeep liberty threw a code:P0303 Cyl #3 Misfire


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I would recommend getting this problem properly diagnosed by a professional. Failure to fix misfire codes promptly can cause severe engine damage and destroy high-dollar parts like oxygen Sensors, catalytic converters, engine blocks and cylinder heads.

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1 Answer

I have a 2003 dodge durango 4.7 and it is overheating which i already r&r the thermostat. fixed the problem a lil but not 100%. also check engine light turned on for second time both same code P0308...


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*Owner of Mecedes C230 Model 2004. 271 engine. Done 85K miles * Check engine light come on when speed at around 135km & misfiring. * Switch off & restart the engine, is ok but misfiring again...


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I have yellow check engine light on in my 2008 kia rio and just took it to autozone and they ran a scan on it said misfire cylinder 1whats that mean and how can i fix it ?


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They all tried flushing the fuel injectors, well that didn't work, and they were confused why it didn't work and said that they couldn't fix it, some said it was a piston, and you might have to overhaul the engine, after that and lots of money spent I had the same problem and thought to myself,well that was one ******** theory, they were so bemused by the whole misfiring of this engine and said they couldn't fix it.

They ran lots of computer tests on my car with a misfiring code that showed up, but a code is just a code with no step by step instructions to fix the problem, no one couldn't fix the misfiring problem.

$1500 later I was about to give up until my sister said that she had found a descent mechanic, told him about my problem and told me to bring my car in.

Well to my amazement, he found the problem, the misfire was caused by the coil that had been shortening (an electrical shortening), and there was evidence of a burn mark on the coil, well he changed the whole coil and changed the spark plug leads and now the car doesn't misfire and works great - I hope this is a solution to your misfiring problem, I thought I would share my story about my Kia Rio misfiring problem - Have a great day everyone.

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4 Answers

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