⚠️ Toyota manufacturer position
Toyota prescribes fuel pump module removal via under-rear-seat access on most Yaris generations sold in the US. Incorrect fuel voids warranty coverage. Follow TIS for pressure relief and module reseal.
Vehicle information
| Make | Toyota |
|---|---|
| Model | Yaris |
| Market status | Sold new in the US 2007–2020 (sedan/hatch); Yaris iA (2016–2020) was a Mazda-sourced sedan. US Toyota Yaris name retired after 2020 model year. |
| Body styles | Sedan, hatchback (generation dependent) |
| Generations | XP90 (2007–2012), XP130 (2012–2019), XP210 Yaris Hybrid (2020 US limited); Scion iA/Mazda2-based sedan separate lineage |
| Engine options | Gasoline: 1.5L I4 (most US models); regular 87 AKI / E10 Hybrid: 1.5L Hybrid (2020 Yaris Hybrid where sold) |
| Fuel tank capacity | 11.1 gal (42 L) typical — varies by model year; consult OEM service information |
| Fuel system | Gasoline port or direct injection; hybrid adds high-voltage fuel-system disable before interior work |
| Access method | Fuel pump access panel under rear seat (typical US Yaris); confirm per VIN in TIS |
| Anti-siphon | Yes — ball-type anti-siphon in filler neck; capless on some model years |
| Service portal | Toyota Technical Information System (TIS) / Techstream |
Misfuel risk Moderate
Compact gasoline and hybrid Yaris models are sensitive to diesel-in-gasoline misfuels at combined truck/auto lanes. Small tank volume means a little wrong fuel is a high concentration.
If the engine was not started
Do not crank the engine. Drain via pump access; replace filter if the pump was energized with wrong fuel in the tank.
If the engine was started
Running on diesel-contaminated gasoline can damage injectors and catalyst on direct-injection engines; follow TIS inspection steps and consider line flush.
Access procedure
- Ignition OFF; relieve fuel pressure per TIS
- Disconnect 12 V negative; hybrid models require HV disable before seat removal
- Remove rear seat cushion; unscrew access panel
- Disconnect pump connector and fuel line quick-connects
- Remove lock ring; extract pump module and drain tank through opening
- Replace O-ring; install new filter if fuel was run
- Reinstall module, reconnect battery, prime and verify no leaks
Notes
- 2016–2020 Yaris iA uses Mazda service procedures — verify badge before assuming Toyota Yaris layout
Frequently asked questions
Is the Toyota Yaris still sold new in the US?
Toyota ended US Yaris sales after the 2020 model year. Used examples and the Mazda-based Yaris iA remain on the road.
What should I do if I put diesel in my Yaris?
Do not start the engine. Drain the tank using Toyota’s fuel pump access procedure and replace the fuel filter.
Does the Yaris Hybrid need special steps for fuel drain?
Yes. Disable the high-voltage system per Toyota hybrid service information before removing the rear seat and accessing the pump module.
Can I siphon gas out of a Yaris filler neck?
Anti-siphon hardware blocks most filler-neck extraction; use the OEM pump module procedure instead.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
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