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Maybe I'm reading too much into 'taking out cars' to mean engine replacement. I would expect at worst it stop driving the alternator and the engine shuts down from dead battery but no real damage.
The belt could be damaged or apparently in extreme situations the belt could catch fire if it rubs. A car fire could take a car out, but yeah, the drive belt itself won't directly damage the engine.
 
Anyone hear anything more about this? I just saw on instagram that a poster said his "serpentine belt flew off and then the water pump exploded, cause it to overheat and then coolant tank blew up etc etc.".................. This has me concerned... especially since I've been hearing a strange whistle sound sometimes when I accelerate. I'm going to call my dealership to see if they can inspect it.
 
My belt has started to make some noise over the last couple days under moderate load after the engine is warm. 9900 miles. I looked at the belt on the pulley and the clearance seems correct, so I'll just take mine into the dealership and have them look at it (and knock out the 10k service while they're at it). I'll keep you posted.

In regards to overheating and coolant tanks exploding... if your belt comes off, dash lights will come on. If dash lights come on, PULL OVER IMMEDIATELY and shut the car off. The belt coming off is not a major issue as long as you don't keep driving the car.
 
My belt has started to make some noise over the last couple days under moderate load after the engine is warm. 9900 miles. I looked at the belt on the pulley and the clearance seems correct, so I'll just take mine into the dealership and have them look at it (and knock out the 10k service while they're at it). I'll keep you posted.
Quick update: I took it to the dealership and they were unable to reproduce the issue. They checked tension and visually inspected belt and pulleys and found no issues. I told them the engine has to be hot, and they want to keep the car overnight for diagnosis, but I'm holding off on that. The problem has lessened dramatically now, to the point where I only very occasionally hear a little squeal under heavy load. I'm going to keep an eye on it to see if it goes all the way away.

One thing I learned at the dealership though: one of the techs there said that his 3.0T (premium) had a leaking water pump that leaked on his belt and caused it to squeal. They found no leaks in my car, but it might be something to keep an eye out for on yours.
 
Anyone hear anything more about this? I just saw on instagram that a poster said his "serpentine belt flew off and then the water pump exploded, cause it to overheat and then coolant tank blew up etc etc.".................. This has me concerned... especially since I've been hearing a strange whistle sound sometimes when I accelerate. I'm going to call my dealership to see if they can inspect it.
Did you ever hear from the dealership? Did they find anything?

I also have a whistle sound when I floor it (no it's not the tires :) ) I checked the belt and it looks in spec.
 
Let me chime in on this!!

I have a Q50 Red Sport, bought it brand new.

Every time they checked it, they said it was within alignment. It doesn't matter, it fell apart anyways. There is something seriously wrong with these motors.

Had the screeching belt issue. Eventually they replicated the issue. The misaligned pulley had burned out the water pump.

Trip 1, 2, and 3: replaced water pump, drive belt, drive belt pulley, AC compressor pulley, and tensioner.

This fix lasted about 5 months.

same thing, whistling screeching noise at 3200 RPM on long pulls.

Trips 4,5, and 6: Dealership thought it couldn't be the belt again, since it was "in spec", but they found oil in turbocharger, bank 2. replaced turbocharger, AF sensor, EGT sensor.

Got the car back yesterday. Alignment is off because they didn't do an alignment after removing the subframe. A piece of plastic flew off my car on the freeway because they didn't clip the shroud in properly.
I get on the freeway and the belt screeches again!!

So back to the dealership, they keep saying they have to personally hear it screech, but even then, the last replacement only lasted 6 months. So now I'm back to fighting Nissan over these self-destructing belt issue, and pursuing a lemon law claim with them.

tl;dr- 2017 Q50RS, 17k miles, blown through serpentine belt, tensioner pulley, AC pulley, water pump, turbocharger, AF sensor, EGT sensor, and it STILL screeches and smells like a burnt belt at 3200rpm. No replacement part related to the belts has lasted more than 5 months.
 
Let me chime in on this!!

I have a Q50 Red Sport, bought it brand new.

Every time they checked it, they said it was within alignment. It doesn't matter, it fell apart anyways. There is something seriously wrong with these motors.

Had the screeching belt issue. Eventually they replicated the issue. The misaligned pulley had burned out the water pump.

Trip 1, 2, and 3: replaced water pump, drive belt, drive belt pulley, AC compressor pulley, and tensioner.

This fix lasted about 5 months.

same thing, whistling screeching noise at 3200 RPM on long pulls.

Trips 4,5, and 6: Dealership thought it couldn't be the belt again, since it was "in spec", but they found oil in turbocharger, bank 2. replaced turbocharger, AF sensor, EGT sensor.

Got the car back yesterday. Alignment is off because they didn't do an alignment after removing the subframe. A piece of plastic flew off my car on the freeway because they didn't clip the shroud in properly.
I get on the freeway and the belt screeches again!!

So back to the dealership, they keep saying they have to personally hear it screech, but even then, the last replacement only lasted 6 months. So now I'm back to fighting Nissan over these self-destructing belt issue, and pursuing a lemon law claim with them.

tl;dr- 2017 Q50RS, 17k miles, blown through serpentine belt, tensioner pulley, AC pulley, water pump, turbocharger, AF sensor, EGT sensor, and it STILL screeches and smells like a burnt belt at 3200rpm. No replacement part related to the belts has lasted more than 5 months.
Where are you located?
 
It's not so much about Q60 forums, it's about VerticalScope and an issue I had with them years ago.

I don't mind telling information via PM tho. Do you work at a dealer?
I don't work for a dealer. The more info members have, the more helpful it is to determine if this is an isolated problem or more widespread.
 
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