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  1. Problems, Maintenance, and Repair (Gen 2)
    Major improvement in gas mileage accomplished by 5 minute procedure - 2004 sienna In recent years, I noticed that the highway mileage on my 2004 Sienna dropped significantly from 24 to 25 miles per gallon down to 21 to 22 miles per gallon. To correct this I did a number of maintenance...
  2. TSB's, Recalls, Warranty Issues
    TSB: BACK DOOR STAY LEAK & COLD WEATHER SHUDDER IMPROVEMENT ; 2007 Summary:The back door stays for 2004 – 2007 model year Sienna vehicles have been redesigned. The updated service parts are available to: • Reduce the operating effort of the rear hatch. • Prevent seal damage resulting in...
  3. Sienna Insiders (TSBs & Other Info)
    BACK DOOR STAY LEAK & COLD WEATHER SHUDDER IMPROVEMENT The back door stays for 2004 – 2007 model year Sienna vehicles have been redesigned. The updated service parts are available to: • Reduce the operating effort of the rear hatch. • Prevent seal damage resulting in leakage. • Reduce the...
  4. Sienna Insiders (TSBs & Other Info)
    POWER SLIDE DOOR CABLE IMPROVEMENT Customers may experience a condition where the power slide door may not operate smoothly, may make noise, and eventually the power feature may become inoperative. A new power slide door motor assembly has been made available to improve durability. Use the...
  5. TSB's, Recalls, Warranty Issues
    Posting some TSBs (Technical Service Bulletins) I happen to have collected during my years of Sienna ownership... This one is a relatively "minor" one. I'm not sure of the exact details and the text of the TSB is somewhat vague, but I believe Toyota decided to change the rear wiper design or...
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