Abnormal Noise From Timing Chain Area on Infiniti QX56

An abnormal noise may develop from the timing chain area, Our technicians tell us it may be necessary to replace the variable valve timing camshaft shaft sprockets to correct this concern.

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Average mileage: 74,472 (31,000–111,000)
4 model years affected: 2005, 2011, 2012, 2013
48 people reported this problem
39 people shared problem details
Car makes whistling noise upon start-up, which goes away after about 10 minutes. Finally, the car stalled and needed to be towed in to the dealer on a flat bed truck. Originally, the dealer said it needed a new engine, but after further review they blamed it on a faulty timing chain.....with a repair quote of between $4000 - 5000. This car is only 2 years old!!! I smell a recall. Too many people with the SAME EXACT PROBLEM! **UPDATE**: Just unloaded the beast after getting the repairs done. I felt like I was playing hot potato and needed to get rid of this vehicle before something else happened, knowing that they do not stand by their vehicle and try to blame the buyer for their mistakes, in effect, soaking their pocketbooks (that's a wallet for all you youngins', lol) in the process. Also, just an FYI for everybody else who is told their car is an anomaly and they've never heard on anybody else having this issue....I believe that they are flat out lying. Many dealerships have told me that this is a common repair. I was told that the issue is that the timing chains made for the car were too small and become fragile and break over time (those 6 years old Japanese kids sure don't make them like they used to). I'm pretty sure that they decided to rename the QX56 and replace (ie. "rename") it with the name QX80 was because they knew in time that they were going to have an expensive recall on their hands and assumed that it would tarnish the reputation of that particular model.
I have been having the issue for a while, (very noisy at start up) then it would smooth out after about 10 minutes. I thought it was the cooling fan or something else. I got in yesterday morning and no Power, irregular idle, then it smoothed out. Took it directly to the dealer, thought maybe bad gas. Called me today 100% sure its the timing chain....a known issue with this vehicle. $4000 repair. We maintain the vehicle, and actually had even tried to extend the warranty, but they were no very good at following up on that? Anyway I have called the consumer affairs folks for some help and hope they do the right thing...at least from my perspective. This is by far the most expensive vehicle I have ever purchased by 2x and certainly would not have expected this type of an issues at such low mileage. I have 300K on my 2002 suburban and never had a repair over 1500...my 4th child is still driving it!
2011 Infiniti QX56105,500
Loud noise coming from the front end of my 2011 QX56. Report from dealer is issue with timing chain. Solution. . . Replace engine at a cost of 16k. I don't understand how the Infiniti people can sell a SUV for what this one cost and have the engine go out at 105,000 miles. Crazy!! Told me they could give me a good deal on a trade-In. Yeah, Right!! Not sure what to do. Seems like there should be other options.
Hissing noise coming from the engine block very early in the morning or when the engine is very very cold. If allowed to warm up for about 10 minutes it drives just fine. Dealership says its a timing chain issue that needs to be replace. Total cost is about $4600.00. Never hear of that. Don't understand how that can happen in a relatively new car.
2011 Infiniti QX5676,000
Just outside of warranty and it's a $3700 repair. I went to Infiniti in attempt for assistance on the repair and was denied as they said I was really far outside of warranty. 6k miles seems to be a little extreme for Infiniti. I'm not sure they believe in the product they are selling. It was a week to complete the repair. It seems to be an ongoing problem.
2011 Infiniti QX5690,000
My car was making a high pitched winding sound on start up and wouldn't stop. Now having to replace timing chain at a cost of $3000!! Bought it used only 9 months ago and have had to repair both catalytic converters, air sensory intake and now this...... very concerned with the quality of this car with all these issues......looking at trading it in over the next year or so...... first Infiniti I have ever purchased and love the ride, look of the car but not so much regarding mechanical end of it. Looking to see if others have had issues same or different than me.
2011 Infiniti QX5673,500
I noticed the same noise at start-up like everyone else. It sounded like a belt slipping but not a major issues. I took it in to the dealer for it's oil change at 75,000 miles and brought it up to the service writer. He said they would have to look into it and gave me loaner car. I went in the next day for him to explain it to me in person as it was either going to be a $4k repair or a $16k engine replacement. I called infiniti customer affairs and they said it's not covered as I am outside of warranty. They also said this is not a problem with these vehicles. It turned out to be a $4k trimming chain repair, the tensioner failed. A week later when I returned to pick up my QX56, there were two others that had come in on that day for the same issue. The dealer says it's a problem with these but Infiniti says it's not. Sounds like Infiniti has a major problem on their hands that they do not want to correct!
2011 Infiniti QX5676,000
Load whining noise only on start up for 10 minutes. Timing chain needing fixing for 4500 or full engine replacement for 15k. Are you serious? Everyone is having this same problem. Infinity better get this sorted. They are losing clients fast.
2013 Infiniti QX5640,000
I have asked the dealership about the issue and they say they are not sure what is going on because it has never done it while I have had it in for an oil change. Fortunately the car is still under warranty. Now that the noise has come back and I have read all of these stories I've called the dealership to come pick it up. Hopefully the issue will be resolved.
2011 Infiniti QX5673,000
Same here---$3800 repair. Out of warranty.
2012 Infiniti QX5636,000
Needed to get new tensionors. It's an 11 hour labor job. Luckily under warranty or it would have been 4-5k repair.
2011 Infiniti QX5673,000
Engine is whining at take off and then goes away after 10 minutes. I would NOT expect this from a luxury car with low miles. Bit disappointed.
2012 Infiniti QX5679,000
needs timing chain assembly replaced
2011 Infiniti QX5680,200
timing chains needs replacement. Quoted $5000 at Infinity of gwinett in georgia. The dealer is telling me that if the oil is not changed every 3700 miles this happens as if this is somehow my fault or that of the previous owner. Not only is nissan not owning up to an obvious design flaw but the are attempting to make a nice profit in the process. This is offensive!
2011 Infiniti QX5684,000
same-costs $3,500 to fix. ugh. Had my Toyota for 10 years with no trouble-have had this car for 2.
2011 Infiniti QX5661,000
Same problem from what I'm reading here. It started last year slowly then until this year that I got really concerned due to its increase noise presence .took it to dealership at gunn infiniti san antonio TX dealership and it's a good thing they said the engine warranty is up to 70000 miles otherwise it would be almost 5k repair out of my pocket. This is my 3rd infiniti from them and they treat me good there. I'm just concerned if all of us here are suffering this problem this should be treated as a cause for recall on this model so they can fix it . I know it will cost them millions. But it could to a safety issue they rather deal with it now than have accident lawsuits later on or what's worst is someone loosing they're life .All my cars never had this problem at 60000 miles. My gas pump was already replaced to the tune of almost a thousand dollar because my warranty was out already I have hit more than 50000 miles and now they're saying the engine warranty is around 70000 thats why they're now covering the repair for the timing belt.I'm confused. I should get my thousand dollar back if this is the case .my catalytic converter was already replaced under warranty . I'm upset that these had to happen to me. if problems continue to show up later on down the road I have admit infiniti has lost its quality.
2012 Infiniti QX5678,000
Timing chain diagnosed as bad just after warranty, Infiniti refused to warranty even though it seems to be a known issue
2012 Infiniti QX5641,000
Started hearing whining noise at cold start up. It would go away after a few minutes but continued to get worse and last longer. Then it also started losing power as if was going to stall, but mainly when it was cold/the sound wasn't completely gone. It is taking Infiniti dealer 2 weeks to fix the timing chain. It is a common problem with mostly 2011 and 2012 models that seems to have been fixed from 2013 models on. The oil jets that lubricate the timing chain were too small and failed to adequately lubricator the chain, leading to eventual premature failure. It is a technical service bulletin currently, but probably should become a recall if it is this common. If yours starts this noise, get it fixed ASAP. I feel this would be a good case for an Attorney General for consumer protection.
2011 Infiniti QX56111,000
Heard whining noise. At Infiniti dealership now... Diagnostic test showed timing chain needs repairing /replace... Car's only 4 yrs old... Is there some type of recall
2012 Infiniti QX5689,000
Whining noise coming from front of engine, varied with engine RPM. Sometimes very loud. Infiniti told us it was timing chain rubbing on oil port. Root cause is chain stretch. $5000 to replace timing chain.
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