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Toyota Sienna Repair in Winston-Salem, NC 

Toyota Sienna Repair in Winston-Salem, NC

At Carolina Mobile Auto Service, we know families rely on their Toyota Sienna to get them where they need to go—school runs, weekend trips, daily commutes, and everything in between. This trusted minivan has built a reputation for comfort, space, and reliability, but like any long-term vehicle, it has its fair share of issues depending on the model year and mileage. 

That’s where we come in. Despite our name, all service is done right here in our Winston-Salem shop. We don’t provide mobile repairs—just consistent, high-quality service from trained professionals who know Toyota vehicles inside and out. 

GMC Terrain Repair

Common Toyota Sienna Problems by Model Year

Understanding the issues specific to your generation of Sienna can help you stay ahead of unexpected breakdowns and make smarter maintenance decisions. 

1998–2003 (First Generation)

The original Sienna gave families a dependable, car-like van experience, but time has revealed some age-related problems: 

  • Sludge Buildup in Engine (3.0L V6): Poor oil flow due to sludge was a known issue, especially if owners didn’t stick to regular oil changes. 
  • Power Sliding Door Malfunctions: Early electric sliding door mechanisms became unreliable, requiring latch and motor replacements. 
  • Camshaft Sensor Failures: Caused stalling or no-start situations in high-mileage vans. 

2004–2010 (Second Generation)

Toyota upgraded the powertrain and introduced a larger interior, but some new issues emerged: 

  • Transmission Hesitation or Shuddering (2004–2006): Transmission wear began showing up as early as 80,000 miles in some models. 
  • Broken Motor Mounts: Common on 2005–2008 models, especially with higher mileage. 
  • Rear Liftgate Struts Failing: Tailgate would suddenly drop due to weak or leaking struts. 
  • Cracking Dashboards (2007–2010): Heat exposure caused surface cracks that were both unsightly and potentially hazardous in crashes. 

2011–2020 (Third Generation)

This generation introduced optional AWD and a new 3.5L V6 engine. It’s generally reliable, but a few concerns have surfaced: 

  • Oxygen Sensor Failures: Common in 2011–2014 models, leading to check engine lights and failed emissions tests. 
  • AWD Transfer Case Leaks: Seen in 2015–2018 AWD versions, requiring seal replacements. 
  • Sliding Door Cable Frays: The power sliding door cable would fray and snap, especially on the passenger side. 
  • A/C Evaporator Leaks (2012–2017): Causes warm air from the vents and expensive dash disassembly to access. 

2021–Present (Fourth Generation - Hybrid Only)

Toyota redesigned the Sienna into a hybrid-only powertrain. It’s fuel-efficient and quiet but has shown early tech-related hiccups: 

  • Infotainment Freezing or Reboots: Some owners experience touchscreen lags or random reboots. 
  • Brake Feel Issues: Regenerative braking can feel “grabby” or inconsistent at low speeds. 
  • Hybrid Battery Alerts: In rare cases, alerts appear without a real battery issue—often fixed via software update. 

What We Service (Only In-Shop—No Mobile Work)

We perform all repairs at our Winston-Salem facility. No mobile visits, no guessing games—just straightforward Toyota repair from a team that knows Toyota’s systems inside and out.

Engine & Hybrid System 

  • Oil leaks (valve cover, timing cover, oil pan) 
  • Spark plug and ignition coil replacements 
  • Fuel injector and throttle body cleaning 
  • Hybrid battery diagnostics and replacement (2021+) 
  • PCV valve and intake cleaning 

Transmission & Drivetrain 

  • Automatic transmission flush and fluid changes 
  • AWD transfer case servicing and seal replacement 
  • Axle and CV joint replacements 
  • Transmission mount repairs 
  • Driveshaft inspections 

Brakes & Safety Systems 

  • Brake pads and rotor replacement 
  • ABS sensor diagnostics and replacements 
  • Brake master cylinder repairs 
  • Parking brake adjustments 
  • Brake fluid flushing and bleeding 

Steering & Suspension 

  • Power steering pump repairs 
  • Strut and shock replacement 
  • Sway bar link repairs 
  • Lower control arm and bushing service 
  • Steering rack repairs and alignment 

Air Conditioning & Heat 

  • A/C system recharge and leak detection 
  • Blower motor and resistor replacement 
  • Heater core diagnostics 
  • Blend door actuator repairs 
  • Cabin air filter service 

Electrical & Comfort Features 

  • Power door motor and cable repairs 
  • Window regulator replacements 
  • Dashboard light diagnostics 
  • Charging system inspections 
  • Infotainment system reset and repairs 

Toyota Sienna Maintenance Intervals

We recommend the following general maintenance schedule, but we’re happy to tailor it based on your driving habits: 

Service 

Interval 

Synthetic Oil Change 

Every 5,000 miles 

Transmission Service 

Every 60,000 miles 

Coolant Flush 

Every 30,000 miles 

Brake Inspection 

Every 10,000 miles 

Spark Plug Replacement 

Every 100,000 miles 

Cabin Air Filter 

Every 15,000 miles 

Battery Test 

Twice per year 

What Our Customers Are Saying

“We brought in our 2013 Sienna for a loud clunk in the front end. They diagnosed it as worn control arms and had it fixed fast.” 
— Andrew P., Winston-Salem 

“After the power door cable snapped, we thought it was going to cost a fortune. Carolina Mobile Auto Service replaced the cable without upselling anything. Honest folks.” 
— Melanie F., Clemmons 

“Our hybrid Sienna had a battery alert at only 40k miles. These guys ran diagnostics and reset the software. No problem since.” 
— Josh L., Kernersville 

Schedule Your Toyota Sienna Repair Today

If your Toyota Sienna is making noises, struggling with power, or showing warning lights, don’t wait. At Carolina Mobile Auto Service, we provide expert, in-shop service for every model year of the Toyota Sienna—from classic 2000s vans to today’s hybrids. 

📍 Visit Us: Carolina Mobile Auto Service – Winston-Salem, NC 
📞 Call Now: (336) 765-8599 
🌐 Schedule Online

Depend on us for honest service, accurate repairs, and no mobile gimmicks—just Toyota expertise that keeps your Sienna running strong.

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