2010 Nissan Versa P0303 Misfire: Is Engine Replacement Worth It or Just Spark Plug/Coil Fix?
I'm a complete car novice, so please forgive any technical mistakes—I'm just trying to figure out what's wrong with my 2010 Nissan Versa. Starting Monday, when I left for work, my car started making a chugging noise during stops at traffic lights and would buck back and forth. While driving, everything seemed normal. On Tuesday, I noticed a distinct clicking sound—like someone flipping the lid of a travel coffee cup—which persisted on Wednesday as well. By the time I got home that evening, the check engine light had come on. At AutoZone, they diagnosed it with code P0303 (misfire in cylinder 3) and suggested either new spark plugs or ignition coils as possible fixes. The check engine light remained on throughout the rest of the day. The next morning (Thursday), I took my car to the dealership. During the drive, the check engine light turned off halfway there. They told me there was no oil in the engine and that a full engine replacement would be necessary—estimated at $5,000. I know for sure the car wasn-\'t low on oil when I brought it in. I'm not confident they're just trying to upsell, so I took it to another mechanic who did a quick inspection. He noticed smoke coming from my dipstick and said it was due to low oil pressure—indicating internal engine problems—but couldn't confirm whether the entire engine needed replacement. Today, after about a month of not driving, I tested the car again. The clicking noise only occurs when I first start the engine—it goes away once the vehicle is running smoothly. If I stop for an extended period, the clicking returns. I know this isn't a full diagnosis, but does anyone with experience on 2010 Nissan Versa models have insight into P0303? Is it more likely to be a cylinder-specific issue (like spark plugs or coils) or a sign of engine failure requiring total replacement? As a last resort, I found a used 2010 engine at a salvage yard for $700. Would replacing just the affected cylinder be cheaper and safer than swapping out the entire engine? Any advice would be greatly appreciated.
You're dealing with a 2010 Nissan Versa and considering a full engine replacement—important to clarify: what is your vehicle's warranty status (miles, purchase date)? Is the engine oil now fully topped up? Any warning lights such as engine oil or oil pressure indicators? Your description of going from normal operation to sudden catastrophic failure with no prior warnings raises concerns. Did you regularly change engine oil? Have you lent the car to someone else? Multiple warning signs should have alerted you earlier. I doubt a 2010 Nissan Versa engine is available for $700—such prices are typically unrealistic unless it's severely damaged or from an older model. Please provide more details so we can assess whether a cylinder-specific repair (like spark plugs or coils) makes sense versus full engine replacement. Your input will help determine the most cost-effective and safe solution.