The front and rear seatbelts on 2005 Siennas jam, fail to retract, and malfunction regularly—often starting under 50,000 miles. The most common failure is webbing that folds over itself when the belt is pulled or retracts, lodging in the bezel or guide opening and becoming stuck. Owners report needing screwdrivers, forceful pulling, or 5–20 minutes of manual manipulation to free a jammed belt, sometimes giving up and driving without it. Cold weather worsens the problem. Some belts fail to retract at all, hanging fully extended and unable to secure an occupant. Buckle latches occasionally fail to engage. Shoulder height anchors can break or stick in the highest position, pulling the belt across the occupant's throat instead of shoulder. Dealers often refuse to fix these issues, claiming they are "normal," cannot be diagnosed without replication, or fall outside warranty. Toyota's 2006 recall (05V327000) and warranty enhancement ZF2 covered some failures but left others unaddressed, and replacement seatbelts have failed again within months. Repair costs run $400–$500+ when out of warranty. A small number of complaints describe dangerous scenarios: a retractor mechanism that tightened instead of loosened around a child's stomach, and a third-row belt that began choking a passenger when it retraced.
Failure modes owners describe
Seat belt webbing folds and jams in retraction guide or bezel
The seat belt webbing folds over on itself during deployment or retraction, becoming lodged in the bezel or guide opening and preventing the belt from retracting or extending smoothly. This occurs on front driver, front passenger, and rear seats.
When: Intermittent, starting as early as 15,000 miles; worsens in cold weather; occurs unpredictably on repeated use
Symptoms owners cite: Belt folds when pulled or retracting; Belt gets stuck in bezel/guide and cannot move; Requires manual manipulation with tools (screwdriver, forceful pulling, jiggling) to clear jam; Takes 5–20+ minutes to free the belt; Driver forced to operate vehicle without seatbelt due to jam
Repairs/costs cited: Owner applied temporary fix using duct tape to cover split point; others manually untangled belts; dealers replaced seat belt assemblies (cost ~$400–$500 out of warranty); dealers sometimes unable or unwilling to diagnose or repair
Recalls/TSBs owners mention: Toyota stated problem was not covered under warranty enhancement ZF2 (claimed it applied only to retractor mechanism, not holder design); Toyota refused to acknowledge as recall issue despite similar complaints; dealership stated 'this just happens' and cannot be fixed
Seat belt does not retract fully
The seat belt remains fully or partially extended and fails to retract into the housing, leaving the belt hanging loose and unable to properly restrain the occupant in a crash.
When: Varies from 15,000 to 89,000 miles; some intermittent, others permanent
Symptoms owners cite: Belt hangs fully extended and will not retract; Belt retracts partially then stops; Occupant feels loose at waist even if belt is fastened; Belt appears to work but fails to hold occupant
Repairs/costs cited: Dealers identified worn or defective retractor spring/pretensioner mechanism; replacement of seat belt assembly or retractor bezel required; estimated cost ~$200–$500+; one complaint noted roller needed replacement
Recalls/TSBs owners mention: Manufacturer only confirmed that mid-rear seat belts were not covered under warranty (front seats only); no further assistance provided
Seat belt buckle/latch fails to engage or stay latched
The seat belt buckle (female connector unit) fails to latch onto the tongue, preventing the belt from fastening. Once fastened, the belt may unbuckle on its own during vehicle motion.
When: Intermittent failures throughout vehicle lifespan
Symptoms owners cite: Buckle fails to latch when tongue inserted; Buckle unlatches while vehicle is in motion; Requires repeated attempts to fasten
Repairs/costs cited: Dealership replaced buckle assembly at owner out-of-pocket cost when out of warranty; service technician noted multiple similar replacements at their location
Seat belt anchor or post height adjustment failure
The shoulder harness anchor post fails to hold at the correct height, either stuck in the up position or sliding down, causing the belt to cross the neck instead of the shoulder. This creates a choking hazard and painful, unsafe fit.
When: Less than one year after recall repair was performed (around 2017 for one owner)
Symptoms owners cite: Post stuck in tallest position, belt crosses neck; Belt too tight across neck causing pain; Belt sits across throat rather than shoulder; Post height adjustment mechanism broken
Repairs/costs cited: Owner had to carry screwdriver and spend time in parking lots manually repositioning belt; dealer replaced belts under recall in 2016 but replacement failed within one year; dealer refused to honor warranty on replacement work
Recalls/TSBs owners mention: Recall (05V327000) performed; however, replacement assembly failed; dealer refused to warranty replacement work and refused further repairs on two separate visits (2017, 2018)
Lap belt harness clip catches or jams on separation point
The lap belt holder clip catches or jams at the separation point of the clip holder when the belt is pulled, sometimes pulling the clip apart. This occurs in second-row seats and prevents the belt from extending or retracting without considerable force.
When: 2005 model year (reported in April 2005)
Symptoms owners cite: Clip catches belt at separation point; Belt jamming when pulled; Clip pulls apart if forced; Difficult to extend or retract belt
Repairs/costs cited: Owner applied owner-fabricated fix: glued clip closed and covered division point with 2-inch tape strip to prevent belt catching
Recalls/TSBs owners mention: Toyota refused to take action after complaint was filed; no recall or warranty assistance offered
Retractor pretensioner failure—belt tightens uncontrollably
When a child leaned forward in a rear booster seat, the lap strap wrapped around the lower stomach area and the retractor mechanism tightened instead of loosening when release was attempted, creating a choking/crushing hazard. Owner had to cut the belt to release the child.
When: At 44,279 miles
Symptoms owners cite: Lap strap wraps around occupant; Retractor tightens instead of loosening when released; Uncontrolled tightening creates injury risk; Child sustained minor cuts to stomach
Repairs/costs cited: Owner had to cut seat belt to release child; vehicle was not diagnosed by dealer
Third-row middle seat belt design hazard—retracting belt can choke occupant
The third-row middle seat belt hangs vertically from a clip that retracts into the ceiling. When an adjacent passenger's neck inadvertently contacted the belt, the retractor mechanism began pulling the belt tight, creating a choking hazard. The belt release was a very small latch requiring external tools to unlatch.
When: Design-related hazard observed during normal use
Symptoms owners cite: Belt retracts and tightens around neck if contacted; Very small release latch (smaller than finger); Creates choking hazard; Retraction mechanism pulls belt without control
Repairs/costs cited: Owner had to retrieve external tool (pen) from front of vehicle to release latch while child was being choked
Neck irritation from misaligned shoulder belt—third row
The third-row seat belt leaves a red mark on the passenger's neck and must be held manually by the occupant to avoid irritation. In an accident, the belt position could cause injury rather than restrain the occupant.
When: During normal seated use in third row
Symptoms owners cite: Red mark on passenger's neck from belt contact; Belt must be held manually to avoid irritation; Improper anchor height (vehicle had second row removed due to wheelchair accessibility modification)
Repairs/costs cited: Manufacturer suggested purchasing a fleece pad to protect neck (not a repair)
Recalls/TSBs owners mention: Manufacturer suggested purchasing aftermarket fleece pad
Synthesized from 76 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.