2003 Toyota Sienna Toyota Sienna 2003

We are 103,000+ car owners sharing real-world car information.

Join Us

2003 Toyota Sienna repairs by problem area

Engine (35%)

Transmission and Drivetrain (8%)

Brakes and Traction Control (8%)

Suspension and Steering (18%)

Electrical and Air Conditioning (16%)

Paint, Rust, Leaks, Rattles, and Trim (2%)

Other (14%)

Chart based on 51 repairs.
See TSBs and recalls for the 2003 Toyota Sienna.

2003 Toyota Sienna engine repair cost distribution

$2500+ (0%)

$1000 - $2499 (18%)

$500 - $999 (12%)

$100 - $499 (35%)

< $100 (35%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 17 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2003 Toyota Sienna 4dr Minivan, ext.

210-horsepower 3.0L V6 4-speed automatic FWD

167200 mi Check light was on. Cleared Code and has not turned on since. 
113000 mi

US $424
O2 sensor after cat rusted and was dangling by wire. Welding completed and sensor replaced. 
83000 mi

US $180
check engine light was on. 
103000 mi

US $150
Oxygen sensor bank 1 sensor 2 
174000 mi

US $350
replace muffler and catalytic converter 
90000 mi

US $30
Engine check light, O2 sensor, replaced with one from parts lot 
147000 mi

US $50
O2 sensor failed 
81000 mi Check engine light came on, needed to replace the coil. 
96500 mi

US $200
car would intermittently not start. They cleaned something out and replaced a filter - this worked for a few months, but the problem has returned. 
117500 mi

US $2000
Major sludge problem. Repair involved removing valve covers and oil pan and cleaning. On this engine, this is very labor intensive. 
101800 mi

US $1400
Ck engine light came on- codes were bad O2 sensor and emissions problem. Replaced O2 sensor and gas cap. 
109000 mi Check engine light came on, dealer read codes and reported car needed new catalytic converter, est $1500 
113000 mi Rough idle, on warm/hot weather car won't keep idle after starting. Pressing the gas for 1 min would temporarily fix it. Real fix was cleaning MAF sensor and throttle intake valve, and using an additive to clean the fuel system. 
122000 mi

US $2000
Drive belt, spark plugs, replacement, gas tank pressure loss. 
176200 mi

US $150
Check engine came on, mechanic suggested to replace MAF and catalytic converter. Work was done on cleaning existing MAF and sensors. 
90720 mi

C $750
P0135 : B1 S1 oem sensor cost $360 labour was extra $250 since the darn sensor was seized and stuck in exhaust manifold. Had to remove manifold, remove and re-tap in order to install new sensor. poor design for exhaust by Toyota. 
243000 mi

US $977
Replace timing belt 

Return to top

2003 Toyota Sienna 2-door

6-cylinder automatic 2WD

178000 mi The engine was apparently gummed up inside, and the oil tube got clogged. This caused the overhead cam bearing to give out. 

Return to top

See TrueDelta's information for all Minivans
See TrueDelta's information for all Toyota models.

2003 Toyota Sienna Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2003 Toyota Sienna problems occur, check out our car reliability stats.