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  1. Problems, Maintenance, and Repair (Gen 2)
    Hello all, 2008 LE, 145,000 miles. After driving on the highway normally for 30 minutes last Saturday, I got check engine, VSC and TRAC OFF lights on when I started it again. I used OBD2 scanner at Autozone and got P0302 code. At first I thought it was because of ignition coils. However, the...
  2. Problems, Maintenance, and Repair (Gen 1)
    I recently had a local freelance mechanic change my radiator in my 98 LE 6 cyl 3.0, he only put 1 gallon of coolant because I bought the coolant and misunderstood I needed to buy 4 gallons, I've tried to add the additional gallons but it's filled up, I've burped it with the heater at full blast...
  3. Problems, Maintenance, and Repair (Gen 3)
    I wanted to throw this out there if anyone is ever interested in a higher-quality all-aluminum radiator upgrade for their 3rd gen Sienna. My 2013 Sienna radiator recently leaked to the point of failure (100k) miles and I had to replace it. Where it leaked was at the juncture between the...
  4. Problems, Maintenance, and Repair (Gen 3)
    Has anyone replaced a Sienna radiator with aftermarket? '13 LE with tow package. The radiator is leaking just after 100k miles. Ideally, I'm hoping to find a good all aluminum one to upgrade to.
  5. Problems, Maintenance, and Repair (Gen 2)
    2004 Sienna LE FWD with 140k miles on it (original owner). My college bound son has been driving it most of the time recently We are relatively newbies as far as intricate knowledge about all components of cars and looking for some advise and guidance. Here is a chronology of events: Last...
  6. Problems, Maintenance, and Repair (Gen 2)
    Hi, I have a 2007 sienna. I noticed recently that my car was leaking transmission fluid. It looks like the leak is coming from the transmission cooler line that connects on the lower part fo the radiator. It's the metal piece that comes with the radiator when you purchase a new one. My question...
  7. Problems, Maintenance, and Repair (Gen 2)
    Hello! I’m in need of some help as we’re stuck. We have to travel 4K miles by car for me to have two more surgeries and we’re having trouble with our 2008 Toyota Sienna AWD XLE. We’ve already have to move the surgeries twice and will have to postpone again. The problem is, it’s for a serious...
  8. Problems, Maintenance, and Repair (Gen 3)
    2015 Sienna SE - 102K miles and original owner. Short- Has anyone had to replace their radiator and thermostat? Long - Driving down the freeway and i get a signal on my screen saying to pull over and turn the car off due to the engine being too hot. So i exit, pullover into a gas station...
  9. Problems, Maintenance, and Repair (Gen 2)
    Hello, I have a 2005 Toyota Sienna XLE Ltd. 2WD. Recently, I topped the coolant since the coolant reservoir looked (kinda) empty. Since then, I have noticed coolant on the driveway (not a terrible mess, but about 12 inches diameter spot). Upon examining, I see coolant traces on the front of...
  10. Problems, Maintenance, and Repair (Gen 2)
    I am surprised at how hard it is to make sure I get the correct radiator... Mine is a 2006 XLE w/ towing, manuf. 01/06 Toyota lists both of these as "correct" when searching by VIN: 16041-0A380 16410-AZ035 Anyone know the difference? Or does someone have a good argument for going with Denso or...
  11. Problems, Maintenance, and Repair (Gen 2)
    i was driving my 2007 Sienna with 150,000 miles today when i turned a corner and noticed it wouldn't accelerate right (seemed to be stuck in a low gear) and RPM would just rev when stepping on the gas. managed to get off the road in 1-2 miles. the car would not go forward or back. checked under...
  12. Problems, Maintenance, and Repair (Gen 2)
    Hello, Return fitting on radiator is leaking transmission fluid. Otherwise radiator is in good condition. Instead of replacing the radiator, I am considering disconnecting the ATP lines from radiator and installing a Derale transmission cooler. Can any one think of potential problems? It is...
  13. Problems, Maintenance, and Repair (Gen 2)
    Couple months ago I renewed the radiator with new hoses and thermostat. A coolant leak developed and I thought it might have been the hose clamps as there was pink residue at the lip of the hoses (might still be as I have not buttoned up everything yet , will report back). Close investigation...
  14. Problems, Maintenance, and Repair (Gen 2)
    I have a 2007 that started leaking antifreeze around the fitting by the oil cooler inlet. After a little wiggling it pulled out leaving a mess of antifreeze and oil. Need to replace but have found very little information on removing the radiator. Some threads and video on the 3.3 engine but...
  15. Problems, Maintenance, and Repair (Gen 2)
    I have a 2006 LE AWD. I replaced the thermostat (because of a leak around that housing). While burping the coolant I noticed the fans never kicked on. I'm not sure how long they have not worked. Took it on a long drive and they still didn't kick on. Changed the coolant temperature sensor (on the...
  16. Problems, Maintenance, and Repair (Gen 2)
    Hi My Sienna 2007 had its water pump changed on Friday by the dealer and I noticed the fan turn on and off very often. I am assuming the fan should work only on a hot day as much as its working now. The outside temperature is +5 C in my area in Canada. I didn't notice any coolant leak on the...
  17. Problems, Maintenance, and Repair (Gen 2)
    I came out of church last night and my Sienna wouldn't move. I looked under the hood and started it and fluid was blowing out of the radiator where the tranny cooler hose connects to the radiator on the bottom. On further inspection it looked like it had been threaded out as the entire fitting...
  18. Problems, Maintenance, and Repair (Gen 2)
    When I flushed the coolant on our '06 a couple of years ago, I used stainless worm clamps instead of the spring clamps. I didn't realize worm clamps can stretch when hot and leak. Ever since I've had slow, small leaks, especially from the lower hose connection. The dealer couldn't find a leak...
  19. Problems, Maintenance, and Repair (Gen 2)
    Hi everyone, does anyone know where I can get this tube-to-tube connector or know the part number? I tried searching around here to no avail. It was leaking around this connector because the clip apparently broke off somehow and I just replaced it with a new clip (but haven't fully installed...
  20. Problems, Maintenance, and Repair (Gen 2)
    First post but long time Toyota owner. My 2006 Sienna was driving fine until parked at Canadian Tire. I came out of the store, started it up and put it in gear and nothing happened (no forward or reverse). Popped the hood and could see transmission fluid coming out of small hose near the...
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