The 1999 Toyota Sienna has no open NHTSA recalls. Owners report 8 recurring issue clusters, led by “Engine oil sludge and engine failure.” Toyota's owner's manual splits service into Schedule 1 (severe) and Schedule 2 (normal). Most US drivers fall under Schedule 1 because it covers short trips, extreme temperatures, dusty roads, or heavy idling. The intervals below reflect Schedule 1 — the schedule Toyota recommends for typical real-world use.
No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.
What drivers and federal regulators have officially reported about the 1999 Toyota Sienna.
ENGINE AND ENGINE COOLING
30 NHTSA complaints · 2001-01 → 2010-10
“OIL SLUDGE (GELLING) DEVELOPS IN ENGINE RESULTING IN THE NECESSITY TO REPLACE THE ENGINE AT GREAT COST”
“1999 TOYOTA SIENNA IS SITTING IN DRIVEWAY FOR PAST 2 MONTHS WITH SEIZED ENGINE DUE TO THIS "OIL SLUDGING" PROBLEM”
“WE TOOK IT TO THE DEALER WHO TOLD US THAT THE ENGINE HAD "SLUDGED UP" AND WOULD REQUIRE AT LEAST $3,000 TO FIX”
STRUCTURE
26 NHTSA complaints · 1999-09 → 2016-05
“CABLE ON PASSENGER SIDE SLIDING DOOR OF 1999 TOYOTA SIENNA VAN SNAPPED AND NOW THE DOOR WILL NOT OPEN AT ALL”
“THE DRIVER SIDE REAR SLIDING DOOR HAS HAD AN INTERMITTENT "STICKING" PROBLEM”
“ELECTRIC SLIDING DOOR INTERMITTENTLY WILL NOT FULLY CLOSE AND LATCH”
LATCHES/LOCKS/LINKAGES
14 NHTSA complaints · 2002-06 → 2010-05
“REAR DOOR HANDLE BROKE LEAVING ONE UNABLE TO OPEN REAR DOOR”
“THE REAR HATCH HANDLE JUST SNAPPED IN MY HAND AS I TRIED TO OPEN THE HATCH”
“WHILE TRYING TO OPEN THE TAILGATE/TRUNK ON MY VAN THE PLASTIC PIECE THAT I WOULD USE TO OPEN THE TRUNK SNAPPED AND BROKE”
TIRES
20 NHTSA complaints · 2000-02 → 2012-12
“UPON REMOVING THE FRONT LEFT FIRESTONE AFFINITY TIRE, FOUND A 7.5" SEPARATION BETWEEN THE TREAD AND THE INTERIOR SIDEWALL, WITH THE STEEL BELT IN VIEW”
“I WAS TOLD THAT THE TWO BELTS INSIDE OF THE TIRES SEPARATED”
“TIRE BLEW OUT SUDDENLY AND SHREDDED BEFORE WE COULD STOP”
STEERING
7 NHTSA complaints · 1999-11 → 2001-11
“WHEN MAKING LEFT TURN ABOVE 20 MILES PER HOUR, STEERING WHEEL LOCKS UP AND MUST WRESTLE IT TO RETURN TO CENTER”
“THE VAN HAS A PROBLEM WITH STICKY RETURN-TO-CENTER AFTER 90 DEGREE LEFT TURN”
“IN EARLY 2001, THIS VEHICLE HAD BINDING IN STEERING, RETURNING TO CENTER FROM LEFT TURNS”
SUSPENSION
13 NHTSA complaints · 1999-11 → 2010-10
“I ALREADY GOT ALIGNMENT DONE TWO TIMES AND NEW TIRES CHANGED BUT PULLING TO LEFT STARTS RIGHT AWAY”
“PULLING TO ONE SIDE CONSTANT. TIRES CROSS-ROTATED AND PULL CHANGES TO OPPOSITE SIDE”
“WHEN DRIVING VEHICLE PULLED TO THE RIGHT”
VEHICLE SPEED CONTROL
5 NHTSA complaints · 2010-01 → 2020-12
“THE VAN HAS SUDDEN ACCELERATION PROBLEM AT TIMES IT IS HARD TO SLOW IT DOWN EVEN STOP IT”
“WHILE DRIVING APPROXIMATELY 45 MPH, THE VEHICLE SUDDENLY ACCELERATED”
“OUR 1999 SIENNA MINIVAN HAS HAD 3 INCIDENTS OF STUCK ACCELERATOR, THE MOST RECENT WAS JAN. 21, 2010”
AIR BAGS
6 NHTSA complaints · 2000-03 → 2007-04
“UPON IMPACT, NONE OF THE AIRBAGS DEPLOYED”
“VEHICLE WAS INVOLVED IN A FRONTAL COLLISION OF 30 MPH IMPACT, AND BOTH AIR BAGS FAILED TO DEPLOY”
“IN SPITE OF A FRONT IMPACT COLLISION THAT BUCKLED THE HOOD AND TOTALLED OUR VAN, THE AIRBAGS DID NOT DEPLOY AND THE SEAT BELT DID NOT LOCK”
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Critical for safety and preventing major damage
Replace 0W-20 full-synthetic oil and filter every 5,000 miles under Schedule 1, or 10,000 miles under Schedule 2. Toyota covers the first 2 oil changes through ToyotaCare.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Rotate tires every 5,000 miles. Toyota recommends rotation at every oil change to maximize tire life on FWD and AWD models.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Often free at the shop where you bought the tires — worth asking before paying.
Inspect brake pads, rotors, and parking brake every 5,000 miles. Toyota recommends measuring pad thickness at each service.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.
Replace DOT 3 brake fluid every 30,000 miles or 36 months. Critical for the integrity of the ABS, VSC, and brake assist systems.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
Keeps your vehicle running smoothly and efficiently
Replace the engine air filter every 30,000 miles. Earlier under Schedule 1 if driven on unpaved roads.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
Toyota labels ATF as 'lifetime fill' on most automatics, but recommends inspection and replacement every 60,000 miles under severe service. Use Toyota WS or Type-IV — no substitutes.
Estimated cost — typical U.S. ranges
Dealer
~$330–$500
Shop
~$235–$355
DIY
~$60–$180
Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.
Toyota iridium-tipped spark plugs are rated for 120,000 miles. Earlier replacement reduces fuel economy and can cause misfires on direct-injection engines.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
Toyota SLLC (pink): first change at 100,000 miles, then every 50,000 miles. Do not substitute green or orange coolant — it will damage the cooling system seals.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Extends the life of your vehicle and improves comfort
Replace the cabin air filter every 30,000 miles, sooner in dusty climates. Located behind the glove box on most Toyota and Lexus models.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Inspect the serpentine belt and tensioner every 60,000 miles. Toyota uses long-life EPDM belts that rarely fail before 100,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$195–$235
Shop
~$135–$165
DIY
~$20–$50
DIY-friendly if you can reach the tensioner. Inspect for cracks rather than swap on a strict mileage interval.
Toyota's 2AR-FE, 2GR-FKS, A25A-FKS, and most Toyota engines built since 2010 use a timing chain rated for the life of the engine. No scheduled replacement.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Pro only
Timing chains are normally lifetime. Listen for rattle on cold start — that's the actionable signal. Replacement is major work, quote separately.
Occupant deaths in fatal crashes (FARS)
76 crashes 1990–2024
How the 76 occupant deaths break down
48
driver deaths
28
passenger deaths
76
occupant deaths
Crash years covered: 1990–2024 This model year first appears in 1999 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.
FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number
FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.
Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.
Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.
IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.
Owner-reported problem signals
Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.
15
complaints mentioning a crash
5
complaints mentioning a fire
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 1999 Toyota Sienna reflects Toyota's published service intervals and the Maintenance Required Light system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.