Toyota · Known Issues

2017 Toyota Sienna Problems: 4 Issues Every Owner Should Know

2017 model year · 2,285+ owner reports · Updated June 2026

According to Au7o's analysis of 2,285+ owner reports, the 2017 Toyota Sienna has 4 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover with 1,800 owner reports. Across all issues, repair costs range from $50 to $3,800. DIY maintenance guides at au7o.io.

All 4 Known Issues

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Community Reported

1,800 owners

On the 2007-2020 Toyota Sienna 3.5L 2GR-FE, the 3.5L 2GR-FE V6 commonly develops oil leaks from the VVT-i oil line, timing cover, and valve cover gaskets. The VVT-i oil hose fitting loosens over time, dripping oil onto the exhaust manifold creating a burning smell and fire risk.

This issue also affects: Audi A4, Audi A5, Audi A6

Common Symptoms

Burning oil smell from engine bay
Oil drips on driveway
Oil on exhaust manifold
Low oil level between changes
Smoke from engine compartment

How to Fix

Tighten or replace VVT-i oil line and sealing washers (Toyota 15679-31010). Replace valve cover gaskets (Toyota 11213-31040 front, 11214-31030 rear). Timing cover reseal if leaking from that area. The VVT-i line fix is a $50 repair; valve cover gaskets run $300-600 due to rear cover access.

What Owners Are Using

Parts and tips from 1,800+ owners who fixed this issue

Tip
Tip
UpgradeHigh-quality synthetic oil helps reduce consumption and protect worn engines (Mobil 1 Extended Performance Full Synthetic Motor Oil)
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UpgradePremium oil filter ensures proper filtration with high-mileage engines (Wix Oil Filter)
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Typical repair cost:$50 - $800

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1,800+ owners have reported this issue

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Community Reported

High Confidence1,800 reportsLast reported by owners Feb 2026Reviewed Feb 2026

Community Reported

290 owners

On the 2007-2020 Toyota Sienna 2GR-FE, the 3.5L 2GR-FE V6 in 2nd and 3rd generation Siennas can consume 1 quart of oil every 2,000-3,000 miles. Worn piston rings and valve stem seals are the primary causes. The issue is more prevalent in vehicles driven primarily in city stop-and-go conditions where the engine rarely reaches full operating temperature.

This issue also affects: BMW X6, Chevrolet Equinox, Chrysler 200

Common Symptoms

Oil level low at every oil change
Blue exhaust smoke on cold startup
Slight oil burning smell after highway driving
Need to add oil between changes
Check engine light for catalyst efficiency

How to Fix

Perform an oil consumption test at the dealer (Toyota procedure involves sealing the oil fill and measuring consumption over 1,200 miles). If consumption exceeds 1 quart per 1,200 miles, piston ring and valve stem seal replacement is warranted. Using 0W-20 full synthetic oil and shorter 5,000-mile intervals can reduce consumption.

What Owners Are Using

Parts and tips from 290+ owners who fixed this issue

TipTrack oil consumption monthly by checking the dipstick on the same flat surface. Document for warranty claims.
UpgradeMobil 1 0W-20 full synthetic - preferred for 2GR-FE (Mobil 1 #120758)
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Typical repair cost:$200 - $3,800

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290+ owners have reported this issue

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Community Reported

High Confidence290 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Community Reported

195 owners

On the 2011-2020 Toyota Sienna, the front AC evaporator core in 3rd generation Siennas develops pinhole leaks from internal corrosion, causing gradual refrigerant loss. The AC system blows warm air intermittently, then fails completely. The rear AC system (if equipped) has a separate evaporator that can also fail independently.

Common Symptoms

AC blows warm air intermittently
AC works only at highway speeds
Musty smell from vents when AC is on
Refrigerant needs recharging annually
Wet carpet on front passenger side

How to Fix

Replace the front AC evaporator core, which requires dashboard removal (8-12 hours labor). Replace the receiver/drier and expansion valve at the same time. Evacuate and recharge the system with the correct amount of R-134a refrigerant (or R-1234yf on later models).

What Owners Are Using

Parts and tips from 195+ owners who fixed this issue

NoteThis is a labor-intensive repair - get quotes from independent shops as dealer labor rates make this very expensive.
TipIf the rear AC still works but front does not, the front evaporator is likely the culprit. A UV dye test can confirm.
UpgradePrestone coolant flush kit for complete cooling system service (Prestone Coolant Flush Kit)
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UpgradeStant thermostat — preventive replacement during coolant service (Stant Thermostat)
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Typical repair cost:$800 - $2,200

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195+ owners have reported this issue

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Community Reported

High Confidence195 reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2004-2020 Toyota Sienna, the hydraulic power steering rack on 2004-2020 Sienna models (non-hybrid, pre-2021) develops internal seal leaks that allow power steering fluid to weep from the rack boots or the input shaft seal. The leak starts slowly but progressively worsens, leading to low fluid level, groaning pump noise, and eventually heavy steering effort. The leak is typically visible as fluid dripping from the rubber boots at either end of the steering rack or from the area where the steering column connects to the rack.

This issue also affects: Chrysler Concorde, Lexus GS, Nissan Murano

Common Symptoms

Power steering fluid puddle under vehicle
Groaning or whining noise when turning the wheel
Steering feels heavy or stiff, especially at low speed
Power steering fluid level drops frequently
Wet or oily steering rack boots

How to Fix

A leaking steering rack should be replaced or rebuilt. A remanufactured steering rack runs $250-$500 for parts, with labor at $400-$800 (3-5 hours including alignment). A new OEM rack is $600-$1,200. As a temporary measure, topping off the power steering fluid and adding a stop-leak additive (Lucas Power Steering Stop Leak, $10) can slow a minor leak for several months. A four-wheel alignment ($100-$150) is required after rack replacement. The 2021+ Sienna uses electric power steering and does not have this issue.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipCheck power steering fluid level monthly if you notice any steering noise. Running the pump dry even briefly will damage it, turning a $500 rack repair into a $1,500 rack and pump repair.
UpgradeCardone remanufactured power steering pump — OE-spec (Cardone Power Steering Pump)
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UpgradePrestone power steering fluid — compatible with most systems (Prestone Power Steering Fluid)
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UpgradeCardone remanufactured steering rack — tested and ready to install (Cardone Steering Rack)
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UpgradeMoog tie rod ends — premium chassis parts for steering precision (Moog Tie Rod Ends)
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UpgradeDorman steering shaft — fixes clunking and binding (Dorman Steering Shaft)
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UpgradeDorman intermediate steering shaft — solves steering play (Dorman Intermediate Steering Shaft)
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Typical repair cost:$250 - $2,000

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0+ owners have reported this issue

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Community Reported

Medium Confidence0 reportsLast reported by owners Invalid DateReviewed Invalid Date

Frequently Asked Questions

What are the most common Toyota Sienna problems?

According to Au7o's analysis of 2,285+ owner reports, the 2017-2017 Toyota Sienna has 4 documented issues. The most frequently reported are: 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover, 2GR-FE V6 Excessive Oil Consumption, AC Evaporator Core Leak and Refrigerant Loss. None are rated critical, but regular maintenance is recommended.

Is the Toyota Sienna reliable?

The 2017-2017 Toyota Sienna has 4 known issues documented across 2,285+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Toyota Sienna problems?

Repair costs for known Toyota Sienna issues range from $50 to $3,800, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2007-2020 Toyota Sienna 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover?

The 3.5L 2GR-FE V6 commonly develops oil leaks from the VVT-i oil line, timing cover, and valve cover gaskets. The VVT-i oil hose fitting loosens over time, dripping oil onto the exhaust manifold creating a burning smell and fire risk. Repairs typically run $50-$800. Severity: medium.

What is the 2007-2020 Toyota Sienna 2GR-FE V6 Excessive Oil Consumption?

The 3.5L 2GR-FE V6 in 2nd and 3rd generation Siennas can consume 1 quart of oil every 2,000-3,000 miles. Worn piston rings and valve stem seals are the primary causes. The issue is more prevalent in vehicles driven primarily in city stop-and-go conditions where the engine rarely… Repairs typically run $200-$3,800. Severity: medium.

What is the 2011-2020 Toyota Sienna AC Evaporator Core Leak and Refrigerant Loss?

The front AC evaporator core in 3rd generation Siennas develops pinhole leaks from internal corrosion, causing gradual refrigerant loss. The AC system blows warm air intermittently, then fails completely. The rear AC system (if equipped) has a separate evaporator that can also fa… Repairs typically run $800-$2,200. Severity: medium.

What is the 2004-2020 Toyota Sienna Power Steering Rack Seal Leak?

The hydraulic power steering rack on 2004-2020 Sienna models (non-hybrid, pre-2021) develops internal seal leaks that allow power steering fluid to weep from the rack boots or the input shaft seal. The leak starts slowly but progressively worsens, leading to low fluid level, groa… Repairs typically run $250-$2,000. Severity: medium.

2017 Toyota Sienna Problems: 4 Issues Every Owner Should Know

All 4 Known Issues

2007-2020 Toyota Sienna: 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2007-2020 Toyota Sienna: 2GR-FE V6 Excessive Oil Consumption#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2011-2020 Toyota Sienna: AC Evaporator Core Leak and Refrigerant Loss#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2004-2020 Toyota Sienna: Power Steering Rack Seal Leak#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

Other Toyota Models

Frequently Asked Questions

What are the most common Toyota Sienna problems?

Is the Toyota Sienna reliable?

How much does it cost to fix common Toyota Sienna problems?

What is the 2007-2020 Toyota Sienna 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover?

What is the 2007-2020 Toyota Sienna 2GR-FE V6 Excessive Oil Consumption?

What is the 2011-2020 Toyota Sienna AC Evaporator Core Leak and Refrigerant Loss?

What is the 2004-2020 Toyota Sienna Power Steering Rack Seal Leak?