Buy 2013 Toyota Sienna Coil Spring (Rear). 2WD, JAPAN BUILT, Base, Limited. 2WD, US BUILT, 2.7 liter BUILT, Suspension, US - OEM Toyota Part # 482310E071 (48231-0E071, 482310E070, 4823148430)

Spring. Coil. Junction block bracket.
Coil Spring. Japan Built.

Coil Spring

Fits Highlander

2WD, JAPAN BUILT, Base, Limited. 2WD, US BUILT, 2.7 liter. 2WD, US BUILT, 3.5 liter, w/Limited. 2WD, US BUILT, Base, Limited. Highlander; 2.7L. Highlander; 3.5L; FWD; w/Limited.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your 2013 Toyota Sienna might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Toyota service department to have your suspension system evaluated.