hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
74,431 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.

2005 Toyota Sienna cooling system problems

cooling system problem

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2005 Toyota Sienna Owner Comments

problem #6

May 262005


  • 10,834 miles


The contact owns a 2005 Toyota Sienna. The contact stated that the check engine and battery warning lamp was illuminated. He also stated that the engine temperature rose and caused the vehicle to overheat. The vehicle was taken to the dealer who diagnosed that the air conditioner compressor was defective and needed to be replace yet the remedy failed to repair the problem. The manufacturer was made aware of the failure who did not offer any assistance becuase the vehicle was repaired four times prior under factory warranty. The vehicle was not further repaired. The failure mileage was 10,834 and the current mileage was 83,113. Updated 07/20/11

- Waterford , MI, USA

problem #5

Sep 152009


  • 99,750 miles
2005 Toyota Sienna xle AWD - slow leak in radiator consistent with tsb regarding cracking of plastic in cold weather conditions lead to overheating of vehicle. Radiator was replaced ($600+) as well as heads needed to be removed and milled ($2000+).

- Montrose, PA, USA

problem #4

Feb 012010


  • 54,000 miles
The radiator on my 2005 Sienna developed a crack on the plastic end cap at 54,00 miles. A three inch crack. I had no indication of a problem developing it happened quickly and left my wife stranded. I was informed by the dealer that it was not under warranty because it is not part of the drive train. Therefore the 60,000 mile warranty did not apply. A friend told me that his 2005 Sienna was covered by and extended warranty because Toyota identified a problem with radiators cracking. I sent my comments/complaint to Toyota who, as usual denied my claim. They said the extension only applied to 2005 Siennas manufactured before September and guess my Toyota was manufacturer's after that date. I guess they did not fix problem for vehicles after September like they thought. I completed the repair myself.

- Sterling, VA, USA

problem #3

Jun 022009


  • 70,000 miles


The A/C in my 2005 Toyota Sienna started blowing hot air out of the driver side vents. The compressor kept kicking on and off. This occurred everytime I used the A/C. after replacing the compressor twice, we still have problems with hot air coming out of the vent while the A/C is on. Now the van today 4/5/2010 has completely stopped blowing cold air and only blows hot air when the A/C is turned on. We took it to the dealer and were told the A/C pulley has not burned up. There was a technical service bulletin on this issue. Toyota technical service bulletin AC003-05 but it only covers vehicles until 36,000. Since the problem occurred after that mileage, we are not covered. This is the third major issue I have had with this 2005 van. I have had the back door gas shocks replaced under a recall and the entire front driver's door replaced under a recall. The fix for the A/C is estimated at $4,000!

- Arlington, TN, USA

problem #2

Jul 182009


  • 108,000 miles
A/C compressor failure on 2005 Toyota Sienna le minivan.

- Litchfield Park, AZ, USA

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problem #1

Feb 132009


  • 104,000 miles
Radiator on 2005 Sienna sprung a leak and drained the coolant dry within a half day. Engine overheated and vehicle had to be stopped on roadside. Water was poured to replace missing coolant allowing owner to get home. Brought to Toyota service center the next day. Owner opted for a non-Toyota replacement radiator (owner was told the old radiator was beyond repair) since a Toyota part would have taken days to procure. Two such replacements were attempted to be installed. Neither one fit. Not only was a Toyota radiator unavailable immediately, it cost $200 more. Owner had to be without transportation for at least 4 days at his expense (a rental). Extended warranty expired at 100,000 miles; incident happened at 104,000 miles.

- Metairie, LA, USA

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