Oil Pump Problems of Toyota Sienna

Our vehicle has 119,698 miles of wear. We had our vehicle serviced at a reputable dealer. While stationary, both a wheel stud (during tire rotation), and the oil pump tensioner bolt hole (during service) broke. Dealer told us excessive force was not used. I believe inferior metal used in manufacturing.

See all problems of the 2006 Toyota Sienna 🔎.

The oil pump assembly failed. It was partially made with a rubber hose that did not perform as it should. It needed to be replaced with a solid metal part. Although there was a safety/service bulletin listed by Toyota on this part it cost almost $1200 to repair.

See all problems of the 2007 Toyota Sienna 🔎.

Engine oil gelled/became sludged in July 2002, oil pump failed in November 2003.

See all problems of the 1999 Toyota Sienna 🔎.

Engine of 1999 Toyota Sienna (van) had sludged engine oil in July 2002, dealer rebuilt engine. In November 2003, oil pump failed on same vehicle. Dealer contends the failure of the oil pump is not related to the engine oil gelling/becoming sludge. Since engine was rebuilt, owner has changed oil every 3,000 miles and has receipts to prove it.

Crankshaft ball bearings are defective, causing decrease in oil pressure and crankshaft and oil pump failures.

See all problems of the 1998 Toyota Sienna 🔎.

With less than 15,000 miles on my van, thick grey smoke began pouring out of the back at startup. I took it in to have the oil changed (not the dealer). It was suggested that I take the car to the dealer, especially if it lost oil (which it did). The dealer found excessive sludge build up. They said they had to clean sludge from the cylinder heads and camshafts, and replace the valve covers, stem seals and related gaskets and the r&r engine oil pan. They also said they cleaned the sludge from the pan oil pump and pick up screen, and the cam caps were scored due to lack of oil lubrication. The onsite service manager (who supposedly spoke to the regional service manager) said the sludge build up was our fault and refused to honor the warranty. We paid $2670. 82 for the repairs. I've had the car back less than a week, but so far no more problems. I feel that a car with less than 15,000 miles on it should not have had this kind of problem, and should have been covered by the warranty. I've talked to several other owners of Toyotas who have had similar problems. Even the Toyota people implied they've seen this type of problem often.

See all problems of the 2000 Toyota Sienna 🔎.