I am reporting a potential safety defect involving the front passenger seat mounting assembly on my 2027 Rivian R1S. While removing the front passenger seat to access the 12V battery, the front-right floor-mounted captive nut detached from the vehicle’s mounting structure as I loosened the seat bolt. The nut spun freely, preventing bolt removal. I had to cut the bolt, and the detached nut fell into the cavity beneath the floor. During reinstallation, a second captive nut at the front-left floor mounting point also detached while tightening the bolt with a standard hand wrench. The bolt initially turned normally before encountering resistance. No torque measurement was available. Two separate captive nuts have now failed, leaving the passenger seat improperly secured to the vehicle floor and creating a significant occupant safety concern, particularly during a collision. I am concerned about the integrity of the captive nut attachments and whether this represents a manufacturing or assembly defect. The cause has not yet been determined. I request that the federal safety agency investigate whether similar seat anchorage failures affect other Rivian R1S vehicles. I am also requesting a manufacturer-approved structural repair and engineering evaluation from Rivian.
The worst 2027 Rivian R1S problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Seats1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Seats1
Recalls 1
Back over prevention: software
- What is wrong
- Rivian Automotive, LLC (Rivian) is recalling certain 2022-2027 R1S, 2022-2026 R1T, and 2027 R2 vehicles. The rearview camera image may be obstructed by a notification when in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
- Risk
- An obstructed rearview camera image can reduce the driver's view behind the vehicle, increasing the risk of a crash.
- Remedy
- Rivian has released an over-the-air (OTA) software update, free of charge. Owner notification letters are expected to be mailed November 9, 2026. Owners may contact Rivian customer service at 1‑888‑748‑4261. Rivian's number for this recall is FSAM-1866. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on on November 9, 2026.
Recall number 26V597000 · Recall details
Technical service bulletins for the 2027 Rivian R1S 1
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
2027 Rivian R1S fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| Electric motor Electric 410 mi range | 4WD | 71-94 | 63-77 | 67-85 MPGe |
What 2027 Rivian R1S owners say
Most recent owner complaints, unedited.
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Questions about the 2027 Rivian R1S
Is the 2027 Rivian R1S reliable?
Owners have filed 1 complaint about the 2027 Rivian R1S, fewer than a typical R1S model year.
What is the most common problem with the 2027 Rivian R1S?
Seats, with 1 complaint.
How many recalls does the 2027 Rivian R1S have?
1 recall, covering back over prevention.
What gas mileage does the 2027 Rivian R1S get?
The 2027 Rivian R1S is rated at 67-85 MPGe combined, with up to 410 miles of range.
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