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So I got a late start getting my license, and my vehicle (30 years old) got a 2007 Nitro SXT, love it and really want to keep it for the next 3-5 years, problem is I'm paranoid about the Transmission and Engine, pretty much anything engine related costs $$$$ to fix, same if I had to buy a used Transmission and both of those instances would leave me without a vehicle for several month's!!

I know anything can fail/break at anytime, but I was curious how reliable are the engine and transmission on the 07 Nitro's? I have almost 117k on mine (unless it got replaced by a previous owner) I'd really like to get another 30k from it, long enough to save for a newer vehicle.
 

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Khaki Nitro Nut
07Lifted,4X4,6sp-man,3.7L
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Preventative maintenance is the key to longevity.
3.7? If yes then plugs every 30K miles, Do not use Platinum or Iridium plugs in the 3.7! Use only ZFR6F-11G plugs, NGK is OEM brand and what I use.
Trany oil, Diff s& X-fer case, and engine oil, see the owners manual for schedule.
 
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Also, think about what has already been done in maintenance. If you don't know if the thermostat has been replaced, you might want to go ahead and do that now. Hopefully the wheel bearings and water pump have already been replaced. Then there's the transmission filter and oil change which can be a few hundred. Good luck, that 3.7L can run a long time if it's taken care of and you avoid overheating it.
 

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The 3.7ltr has a great reputation. Chrysler has used it for several of it's vehicles including the Nitro, Liberty and Jeep Wrangler. As Scar stated, it's about taking care of it and doing PM's as required. I've done oil & filter every 5k miles, tranny fluid & filter at 100k, NGK Spark Plugs every 30k and I just turned 180k on mine. I've had zero issues with my engine or transmission.
 
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