What are the most common Toyota Yaris problems?
According to Au7o's analysis of 1,400+ owner reports, the 2018 Toyota Yaris has 7 documented issues. The most frequently reported are: Electric Power Steering (EPS) Failure, 4-Speed Automatic Transmission Shudder and Harsh Shifts, Cylinder #1 Ignition Coil-on-Plug Failure and Spark Plug Well Water Intrusion (1NZ-FE). Of these, 1 is rated critical and should be addressed promptly.
Is the Toyota Yaris reliable?
The 2018 Toyota Yaris has 7 known issues documented across 1,400+ owner reports. 1 issue is rated critical: Electric Power Steering (EPS) Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Toyota Yaris problems?
Repair costs for known Toyota Yaris issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Electric Power Steering (EPS) Failure, typically costs $300-$1,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2007-2018 Toyota Yaris Electric Power Steering (EPS) Failure?
The Yaris's electric power steering system can fail, causing sudden loss of power assist and very heavy steering. The EPS motor or its control module malfunctions, typically with a power steering warning light. The failure is sudden and dangerous at low speeds. Repairs typically run $300-$1,200. Severity: high.
What is the 2007-2018 Toyota Yaris 4-Speed Automatic Transmission Shudder and Harsh Shifts?
The U340E/U441E 4-speed automatic in the Yaris develops shudder during torque converter lockup and harsh shifts, particularly 1-2 and 2-3 shifts. Worn transmission fluid and torque converter clutch material are the primary causes. Repairs typically run $150-$1,800. Severity: medium.
What is the 2007-2018 Toyota Yaris Cylinder #1 Ignition Coil-on-Plug Failure and Spark Plug Well Water Intrusion (1NZ-FE)?
The 1NZ-FE/2NZ-FE coil-on-plug packs are a recurring failure point, and cylinder 1 - the one closest to the front of the engine and nearest the cowl drain area - fails disproportionately. Two mechanisms show up on the forums: the coil's internal windings break down with heat and… Repairs typically run $60-$300. Severity: medium.
What is the 2016-2020 Toyota Yaris Yaris iA / Yaris Sedan (Mazda2) Infotainment Head Unit Reboot Loop and Backup Camera Dropout?
The 2016-2018 Yaris iA and the 2019-2020 Yaris sedan are rebadged Mazda2s and carry Mazda's Connect head unit, not a Toyota system - so this failure does not exist on the Toyota-built XP130 hatchback. Owners report the display going black and the unit entering an endless crash-an… Repairs typically run $0-$900. Severity: medium.
What is the 2007-2018 Toyota Yaris Front Engine Mount Premature Failure?
The Yaris front engine mount (also called the dogbone mount or torque strut) fails prematurely, typically between 60,000-100,000 miles. The rubber deteriorates and the mount collapses, allowing excessive engine movement during acceleration and braking. This causes a harsh clunk w… Repairs typically run $100-$400. Severity: medium.
What is the 2007-2018 Toyota Yaris Rear Wheel Speed Sensor Corrosion at the Hub Connector (ABS and Brake Warning Lights)?
A very common Yaris electrical fault: the rear wheel speed sensor is integrated into the rear hub/bearing assembly and is not sold separately. The weather seal where the harness plugs into the hub has a gap, so road spray and winter salt wick into the connector, corrode the pins… Repairs typically run $20-$700. Severity: medium.
What is the 2016-2020 Toyota Yaris Yaris iA / Yaris Sedan 6-Speed Automatic Whine on Upshift and Park-to-Drive Grind?
The Mazda-sourced 6-speed automatic in the 2016-2018 Yaris iA and 2019-2020 Yaris sedan (a completely different unit from the Toyota U340E 4-speed in the hatchback) draws consistent owner complaints of a whistling or whining noise during the 1-2 and 2-3 upshifts, plus a grinding… Repairs typically run $150-$3,500. Severity: medium.
