2018 Toyota SIENNA

Problems, Recalls & Reliability Report

Average

Quick Summary

The 2018 Toyota SIENNA has 85 owner complaints filed with NHTSA — that's 1.1x the segment average of 80. The most common issue is transmission problems (20% of all complaints), specifically: my 2018 sienna le is experiencing acceleration problems. i had the software up dated but after approximately 1,000 miles the problem is returning. this problem is especially unsafe when merging onto the highway..

5 crash reports 6 injuries

Total Complaints

Recalls Issued

—/5

Safety Stars

1.1x

vs Segment Avg

Known Problems

TRANSMISSION

17 complaints

20%

• MY 2018 SIENNA LE IS EXPERIENCING ACCELERATION PROBLEMS. I HAD THE SOFTWARE UP DATED BUT AFTER APPROXIMATELY 1,000 MILES THE PROBLEM IS RETURNING. THIS PROBLEM IS ESPECIALLY UNSAFE WHEN MERGING ONTO THE HIGHWAY.
• THE VAN STRUGGLES TO ACCELERATE. THERE IS NO WAY TO TURN OFF ECO MODE. NO BUTTON IS AVAILABLE. VAN STRUGGLES TO GO UP HILLS , EXCELERATE THRU INTERSECTIONS AND ALWAYS HUNTING FOR GEARS OR STUCK IN A GEAR AND SOUNDS AND ACTS VERY HEAVY ON POWER TRAIN END. THERE IS AN OPTION TO TURN OFF ECO LIGHT.TUR
• 2018 TOYOTA SIENNA LE. CONSUMER WRITES IN REGARD TO DELAYED ACCELERATION WHICH IS CAUSING TRANSMISSION DAMAGE. *AS *TR

Typical onset: 50K miles Est. repair: $500

“MY 2018 SIENNA LE IS EXPERIENCING ACCELERATION PROBLEMS. I HAD THE SOFTWARE UP DATED BUT AFTER APPROXIMATELY 1,000 MILES THE PROBLEM IS RETURNING. THIS PROBLEM IS ESPECIALLY UNSAFE WHEN MERGING ONTO THE HIGHWAY.”

— NHTSA complaint filing

OTHER

16 complaints

19%

• 3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL GET HOT AFTER 10 MINUTES OF DRIVING. TOOK THE VEHICLE TO TOYOTA DEALERSHIP FOR DIAGNOSIS AND WAS TOLD THAT THE REAR HEATING UNIT IS ROUTED ALONG THE 3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL. SINCE THE LINES FOR THE REAR HEA
• 1. EVEN TO GO ON A SMALL UPHILL SLOPE, THE VEHICLE(V6) REALLY STRUGGLES. AND WHEN I TRY TO ACCELERATE, IT KIND OF STALLS OR SLOWS DOWN FOR A MOMENT, THEN TRIES TO SPEED UP BUT ITS STILL VERY SLOW. I'M FACING THIS ISSUE EVERY DAY. MY OTHER CAR 2011 CAMRY(V4) IS VERY SMOOTH AT THE EXACT SAME PLACES. C
• THE PCS STOPPED OUR VAN ABRUPTLY WITH NO WARNING AND DID NOT SLOW DOWN. CRUISE CONTROL SET AT 75 MPH NORTH BOUND ON TX HWY 69 BETWEEN ALTO AND RUSK, TX. NO RAIN SMOOTH ROAD LATE AT NIGHT ONLY THE CAR IN FRONT OF US. NO OTHER TRAFFIC. I SCREAMED. HUSBAND HAD FALLEN TO SLEEP AT THE WHEEL EVEN THOUGH W

Typical onset: 50K miles Est. repair: $500

“3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL GET HOT AFTER 10 MINUTES OF DRIVING. TOOK THE VEHICLE TO TOYOTA DEALERSHIP FOR DIAGNOSIS AND WAS TOLD THAT THE REAR HEATING UNIT IS ROUTED ALONG THE 3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL. SINCE THE LINES FOR THE REAR HEA”

— NHTSA complaint filing

FUEL SYSTEM

13 complaints

15%

• TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT AFTER COMING TO A COMPLETE STOP, THE VEHICLE HESITATED WITHOUT WARNING AS THE ACCELERATOR PEDAL WAS DEPRESSED. UPON INVESTIGATION, THE CONTACT DISCOVERED NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PARTS TO
• TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE). THE CONTACT CALLED THE LIA TOYOTA DEALER, LOCATED IN WEST NYACK, NY, AND IT WAS CONFIRMED THAT THE PARTS WERE NOT AVAILABLE. THE MANUFACTURER WAS NOT NOTIFIED OF
• WE RECEIVED NOTICE FROM TOYOTA OF A POSSIBLE FAILURE IN THE VEHICLE'S FUEL PUMP FOR WHICH THERE IS NO CURRENT FIX AVAILABLE. THE VEHICLE IS PARKED IN THE GARAGE. NOTHING HAPPENED. MY CONCERN IS THAT THERE'S NO DATA AVAILABLE ABOUT THE FREQUENCY OF THESE FAILURES, SO IT'S IMPOSSIBLE FOR ME TO ASSESS

Typical onset: 50K miles Est. repair: $500

“TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT AFTER COMING TO A COMPLETE STOP, THE VEHICLE HESITATED WITHOUT WARNING AS THE ACCELERATOR PEDAL WAS DEPRESSED. UPON INVESTIGATION, THE CONTACT DISCOVERED NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PARTS TO ”

— NHTSA complaint filing

ELECTRICAL

6 complaints

• 3RD ROW POWER SEATS ARE MALFUNCTIONING AND ARE OPERATING WHILE VEHICLE IS IN MOTION. MULTIPLE TIMES, AND ON DIFFERENT DAYS, THE POWER SEATS HAVE STARTED TO CLOSE WHILE PASSENGER IS SEATED AND BUCKLED IN THE SEAT. OCCURRED TODAY WHILE ON THE HIGHWAY, AT HIGHWAY SPEED WHILE MY WIFE WAS SEATED IN THE
• TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 20 MPH, THE MASTER WARNING LIGHT ILLUMINATED AND THE VEHICLE STALLED. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. AN UNKNOWN DEALER WAS NOTIFIED OF THE FAILURE. THE MANUFACTURER WAS NOT NOTIFIED. THE CONT
• APPEARS ALL THE TIME THE TIRE PRESSURE WARNING LIGHT .

Typical onset: 50K miles Est. repair: $500

“3RD ROW POWER SEATS ARE MALFUNCTIONING AND ARE OPERATING WHILE VEHICLE IS IN MOTION. MULTIPLE TIMES, AND ON DIFFERENT DAYS, THE POWER SEATS HAVE STARTED TO CLOSE WHILE PASSENGER IS SEATED AND BUCKLED IN THE SEAT. OCCURRED TODAY WHILE ON THE HIGHWAY, AT HIGHWAY SPEED WHILE MY WIFE WAS SEATED IN THE”

— NHTSA complaint filing

BODY/STRUCTURE

5 complaints

• TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT THE CARPET ON THE DRIVER SIDE NEAR THE ACCELERATOR AND BRAKE PEDALS WAS LOOSE AND MADE CONTACT WITH THE DRIVER'S FOOT WHILE DRIVING. THE VEHICLE WAS TAKEN TO CAIN TOYOTA (6527 WHIPPLE AVE NW, NORTH CANTON, OH), BUT THE FAILURE WAS NO
• THE AUTOMATIC SLIDING DOORS DO NOT HAVE AN AUTO/EMERGENCY STOP IF SOMETHING IMPEDES THEIR SHUTTING. A CHILD CAN GET CRUSHED IF AN ADULT IS NOT THERE TO STOP THE DOORS. EVEN THOUGH I WAS THERE IT WAS VERY HARD FOR ME (AN ADULT) TO STOP THE DOORS FROM CLOSING. YES, THE CHILD WAS WRONG FOR PUSHING T
• POWER DOOR CABLE BROKE,DOOR DOES NOT OPEN

Typical onset: 50K miles Est. repair: $500

“TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT THE CARPET ON THE DRIVER SIDE NEAR THE ACCELERATOR AND BRAKE PEDALS WAS LOOSE AND MADE CONTACT WITH THE DRIVER'S FOOT WHILE DRIVING. THE VEHICLE WAS TAKEN TO CAIN TOYOTA (6527 WHIPPLE AVE NW, NORTH CANTON, OH), BUT THE FAILURE WAS NO”

— NHTSA complaint filing

Estimated Repair Costs

TRANSMISSION(~50K mi)

$500

OTHER(~50K mi)

$500

FUEL SYSTEM(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

BODY/STRUCTURE(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 85 owner complaints for this specific year, here's what to check or ask about:

☐
TRANSMISSION: MY 2018 SIENNA LE IS EXPERIENCING ACCELERATION PROBLEMS. I HAD THE SOFTWARE UP DATED BUT AFTER APPROXIMATELY 1,000 MILES THE PROBLEM IS RETURNING. THIS PROBLEM IS ESPECIALLY UNSAFE WHEN MERGING ONTO THE HIGHWAY.
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: 3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL GET HOT AFTER 10 MINUTES OF DRIVING. TOOK THE VEHICLE TO TOYOTA DEALERSHIP FOR DIAGNOSIS AND WAS TOLD THAT THE REAR HEATING UNIT IS ROUTED ALONG THE 3RD ROW SEATING PASSENGER SIDE CUT HOLDERS AND SIDE PANEL. SINCE THE LINES FOR THE REAR HEA
Typically appears around 50K miles. Repair cost ~$500
☐
FUEL SYSTEM: TL* THE CONTACT OWNS A 2018 TOYOTA SIENNA. THE CONTACT STATED THAT AFTER COMING TO A COMPLETE STOP, THE VEHICLE HESITATED WITHOUT WARNING AS THE ACCELERATOR PEDAL WAS DEPRESSED. UPON INVESTIGATION, THE CONTACT DISCOVERED NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE) HOWEVER, THE PARTS TO
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: 3RD ROW POWER SEATS ARE MALFUNCTIONING AND ARE OPERATING WHILE VEHICLE IS IN MOTION. MULTIPLE TIMES, AND ON DIFFERENT DAYS, THE POWER SEATS HAVE STARTED TO CLOSE WHILE PASSENGER IS SEATED AND BUCKLED IN THE SEAT. OCCURRED TODAY WHILE ON THE HIGHWAY, AT HIGHWAY SPEED WHILE MY WIFE WAS SEATED IN THE
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)