Poll- Dual vs Quad Motor Failure/Replacement.

[Carscott]

Hi Rivian Owners. For those who have had an actual motor replaced under warranty on a R1T or R1S

Please indicate model.

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[sub]

I said yes/quad but actually my appointment is still a few weeks out. So I haven't actually had it replaced yet.

Motor failure warning popped up in early January, Rivian denied there was a problem for a month. Then scheduled the replacement for yet another month.

 

[Webleyaz]

My front drive unit is being replaced as I type this. No warning, no failure. Tech that replaced the front shocks said he heard something and wanted to see the truck back to diagnose. Now, I'm in a loaner until the end of next week. Easy peasy.

 

[meshugy]

I hope one of my Bosch motors fails just as they run out of replacements, forcing them to replace my entire vehicle with a 2025 Quad

 

[kschad]

My front drive unit is being replaced as I type this. No warning, no failure. Tech that replaced the front shocks said he heard something and wanted to see the truck back to diagnose. Now, I'm in a loaner until the end of next week. Easy peasy.

What sort of failure did you have and what were the symptoms? Curious since it didn't throw a code, was it still drivable?

 

[Webleyaz]

What sort of failure did you have and what were the symptoms? Curious since it didn't throw a code, was it still drivable?

I noticed nothing. Apparently, the tech heard something when he test drove it after replacing the front shocks. They set up an appointment for a month later and said there was no danger of failure so off I went. Feb 10 they traded me for one of their loaners and got to work. Their diagnosis was it needed a new drive unit. I should be able to trade back by Fri the 21st. I hope to get some details at that time.

 

[Carscott]

I’m worried that I didn’t read between the lines for what the sales guy was stating to me when deciding between quad and dual. The quad has a longer warranty he said. And here I am with a rear dual drive unit replacement at 19,000 km. I’m curious if all that oil cooling may not be good for electronic parts if seals can’t work.

 

[Yossarian]

This is (so far) a pretty small sample size, but an overall 12% drive motor failure rate, split pretty evenly between quad and dual is not encouraging. It would be good to know more detail about the failures, such as if they occur on early vehicles or are spread more randomly, whether they are front or rear, etc.

 

[Donald Stanfield]

Happened to my R1T quad before I took delivery. So it was an immediate failure that delayed delivery a week.

 

[sub]

This is (so far) a pretty small sample size, but an overall 12% drive motor failure rate, split pretty evenly between quad and dual is not encouraging. It would be good to know more detail about the failures, such as if they occur on early vehicles or are spread more randomly, whether they are front or rear, etc.

Rear motor(s). 1.5 years - 25,000 miles.

10 minutes into a drive a motor failure warning on dashboard and speed limited to 42mph. Both rear motors were disabled. Acceleration was similar to eco mode but then at 42mph all power suddenly cut out. I was on an interstate so 42 mph was quite uncomfortable. The surrounding traffic was all going 30mph faster.

2 reboots and a 12h rest restored functionality. Rivian initially said that they reviewed the logs and confirmed that nothing was wrong. I guess random temporary motor failures are acceptable in their minds!

But then a month later they called me and said they changed their mind and want to replace.

 

[Carscott]

This is (so far) a pretty small sample size, but an overall 12% drive motor failure rate, split pretty evenly between quad and dual is not encouraging. It would be good to know more detail about the failures, such as if they occur on early vehicles or are spread more randomly, whether they are front or rear, etc.

I had thought of this shortly after posting. Front rear was what I wanted to add the detail of. However it didn’t let me revise the question order.

Hopefully more respond seems like there are a rash of motor issues lately in cold climates no matter the config Q/D.

 

[Kunzene]

I have a fairly early VIN, noticed fluid leaking from the rear drive unit within a month of getting the vehicle in 2022. I never had warnings or a motor failure but they replaced the unit. No problems since.

 

[beyond]

2022 R1T here, vin in the 30xx range. Front drive unit replaced at 28k miles; not due to any faults but instead a grinding noise emitted above 60mph that you could also feel in the pedals. Also replaced my front sub frame with the gen2 retrofit as the old frame's mounting holes had been maligned and made it where not everything would even fit back together after being taken apart.

 

[Wokka1827]

Front motor on my dual. Had a weird buzzing / whining noise coming from it. The frustrating thing is, it came back from the service center “all good” for another problem but they failed to let me know about this until I re-booked it in. Oh well, it got sorted once I booked it in for that problem. I guess it was worth it for them to see if I wouldn’t notice?

 

[MrMusAddict]

Ideally this would've been a choice of 4 options;

1. Yes - Quad
2. Yes - Dual
3. No - Quad
4. No - Dual

That way we would've seen a more representative failure rate.

• As of me writing this comment, the poll has a ratio of 1.33 : 1.00 (Quad : Dual)
• Per Electrafi, config of registered users is a ratio of 1.90 : 1.00 (Quad : Dual)

Taken at face value, this suggests that Quads are 30% less likely to fail than Duals. However, there's too much ambiguity due to sample size and lack of sample-group overlap verification. Best case, the failure rate seems plausibly 1:1 (by vehicle).

What's interesting about that is that there's twice as many motors on the quad. So, does this suggest that per-motor, Enduro fails 2× more frequently than Bosch? ?

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