definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
39,918 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2012 Toyota Sienna fuel system problems

fuel system problem

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2012 Toyota Sienna Owner Comments

problem #2

Oct 302015


  • 79,000 miles


All underwood components are not only vulnerable, but attractive to rodents. While parked overnight on 4 consecutive nights, rodents have chewed through wires despite attractive rodent poison in the engine bay, the poison is untouched and the wires are attacked every night. To date injector wires, sensor sires, fuel pump wires have been compromised, including sensors for the stability control system, which is disabled. I repaired damage by running new wires, clearing nests and set traps and poison, but now the the fuel system has been attacked and the fuel pump does not activate. 3 other cars parked in the same location for the past 5 months are untouched. Safety systems are likely to be compromised for any person who must park these outdoors.

- Edmond, OK, USA

problem #1

Nov 282011

Sienna 6-cyl

  • Automatic transmission
  • 836 miles
The contact owns a 2012 Toyota Sienna. The contact stated that there was a knocking and swooshing sound coming from the fuel tank. The noise would become louder when the contact was driving at lower speeds. The vehicle was taken to the dealer on several occasions. The dealer replaced the fuel tank but the repair did not correct the problem. The manufacturer was notified who stated that the noises were normal and offered no assistance. The failure mileage was 836 and the current mileage was 5,384. Updated 2/12/13

- El Paso, TX, USA

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