1. Part store
https://www.oempartsource.com/ https://www.ebay.com/str/genuinetoyota?_trksid=p2047675.l2563
https://www.ebay.com/str/Royal-Toyota-Scion-Mazda-Volvo/Sienna/_i.html?_storecat=2066698018
http://www.toyotaonlineparts.com
http://parts.autonationtoyotasouthaustin.com
melody toyota： 750 El Camino Real, San Bruno, CA 94066(855) 935-0636
2 Part number
Timing belt kit Aisin TKT-026包括：
Timing Belt 13568-09080=Bando 6PK1040（唯一缺点：不像Old Really’s 卖的Gates带刻度线）
Water Pump & Water Pump Gasket （水泵只是一半，叶轮是塑料）16100-29085
Hydraulic tensioner
Tensioner Bearing
Idler Bearing
还需加：
Power steering belt 90080-91088-83
A/C alternator belt: 99366-21040-83
You can also add thermostat & gasket. Toyota 90916-A3003 Thermostat, 16325-62010; or Stant 25286 gasket(both Sienna and GS300)
wiper kit L:85212-AE010 R:85212-0C011
wiper refill L: 85214-AE010 R:85214-0C011，实际买的85214-YZZF1，85213-YZZC2
wiper kit back: 85212-13031 refill: 85214-50061
90311-38034 camshaft sealx2 （根据VIN由toyota parts确定无误，sienna有两种发动机）
90311-40022 crankshaft seal
90430-A0003 or DORMAN 095149 ATF washer (rockauto)
engine air filter, Toyota 17801-OH010, CA 9360驾驶侧大黑盒去螺栓掀开换。
carbin air filter, Toyota 87139-32010
http://www.siennachat.com/forum/64-general-discussion/10688-transmission-drain-plug-washer.html
00279-000T4-01 ATF 1qt.
90080-19025 Ignition coil, Denso (3297) SK20R11 Spark plug, 100K mile
17176-20020: intake air gasket
15330-0A010 VVTi control valve
12204-20040 PCV
48520-A9380+48510-A9690 or 48520-A9260+48510-A9240 struts
48531-A9050 rear shock absorber (need 2)
44250-08041 Power stering Rack and pinion
45470-09030+45460-09040+90080-17219 tie-rod 2pcs+adj nut(need 2)
Sienna fuel pump：77020-08031，Denso 323-59229,fuel pump+strainer 950-0224,filter 233000A030,Airtex E8513
Alternator 27060-0A110/Denso 210-0545 130A(0539 150A), Starter 28100-0A010/28100-0A011/Denso 280-0339 1.7KW
Fuel pump 951-0023, Fuel pump strainer 952-0090
3. Forum
Sienna: https://www.siennachat.com/forum/63-generation-2-sienna-2004-2010/
My 2006 LE now has 160400 miles, Just got done with the rear shocks ,front struts , steering rack, control arm ,ball joints and tie rods . Also renewed the transmission strainer and did drain and fills
2004 LE that I bought new in 2004. I have done all the routine maintenance, timing belt twice, spark plugs twice, tires and brakes. Original front rotors went 220,000 miles but replaced due to rust. Did the lower front control arms, bushings were shot. Replaced the struts and shocks at 185,000, not sure they were needed. I also replaced the radiator at about 170,000 miles due to leaking at seam. Also had to fix the front door check bracket where the spot weld fails on all of the Siennas of this vintage.
204K miles on 2005 xle limited. Timing belt / WP package at 95k miles, not yet again. Radiator at 160k miles. Rack n Pinion replaced at 150k miles. Sliding door actuators on both doors 180k/190k miles.
2006 Sienna LE just over 230K. SIL bought it barely used in 2007, but did all of the maintenance on time. Runs perfectly, everything works, doesn't even burn oil. I hope to get another 100K out of it, at least.
(2017) I have a 2002 Sienna Symphony with 326,000 miles. Original transmission and engine. 400,000 here we come!
(2015) my 2007 Sienna have 329K miles. It's my daily driver.
(2018.1) 372,000 miles. The timing belt has been changed three (3) times along with the water pump each time. I'm on the second alternator. I have replaced the battery for the 2nd time. I have replaced all the brakes (front and rear) three times - the last time was last year. I have also had the engine's gaskets and seals all replaced at the timing belt change at 279,000 miles. Also I had all the struts replaced and all suspension bushings replaced at the same time around 310,000 miles. This tightened up and quieted down the suspension amazingly. Last year the A/C needed work (turned out to be a main refrigerant line which was decayed internally causing a blockage.
My friend from the dealership showed a customer traded in a Sienna with over a 1 million kms.
小结：平时备件刹车片，点火线圈2个。110K时建议备件alternator/starter、换timing belt/水泵/thermo时拆alternator换电刷、换spark plug、换ATF/coolant。以后视情换缸盖seal、前struts后shock、motor mount、power stering和diff boot、power stering rack and pinion也常需换、tie rod、OCV、PCV、CAM seals、水箱。目标是30万迈。
4.修理
参见：http://blog.wenxuecity.com/myblog/36867/201412/3269.html? http://blog.wenxuecity.com/myblog/36867/201703/33596.html
Sienna换电机：10mm, 12mm, 14mm sockets and some ratchet. https://www.youtube.com/watch?v=7AxzNAjuQ-Q? https://www.youtube.com/watch?v=bKRVkYWkY1I 先松12/14mm螺栓，再把12mm张紧螺栓松开直至皮带可以取下，但该螺栓不用取下。12万迈的车电刷还剩一半而且挺干净，电刷盒有上盖周围有简单排末开口，完全不像12.8万迈的GS300，后者电刷盒里全是粉末。
Sienna Starter更换：https://www.youtube.com/watch?v=xP7CnexxIKM https://www.youtube.com/watch?v=hSgBSzMgbOc 28100-0A010/0A011螺线管是封闭的，Ebay有Denso 153400-8403。
Fuel pump assy 23220-0A050/77020-0E012,only or kit 951-0023, Fuel pump strainer 952-0090
Sienna AC compressor: https://www.youtube.com/watch?v=Az_Y_R2uIRA
motor mount: https://www.youtube.com/watch?v=33k3vL-j68Y https://youtu.be/gSlYunEjGfs
tie rod：https://www.youtube.com/watch?v=05XOhz67jGA
轮胎：201903
