Keysolved

Toyota Sienna OBD port location

Two generations, 2011–2025. Pick yours.

2021–2025

4th gen (XL40)

Illustration — use it to know where to look.

Location

Left-hand drive only — the XL40 Sienna was never sold in right-hand drive in North America. The white 16-pin DLC3 sits in the driver's footwell under the lower dash, to the left of the steering column in the gap between the column and the driver's door kick panel, facing down and slightly rearward. Use the interior fuse box as your landmark: the fuse box is the panel with the snap-off cover directly above your left knee, and the diagnostic socket is the bare connector immediately outboard of it. Same position on every trim from LE to Platinum, and unchanged by the 2025 refresh.

Also on this Sienna

  • KeysSmart key
  • Tools confirmed5
  • Transponder chipSubscribers
  • Programming procedureSubscribers
Open the full Sienna 4th gen record

2011–2020

3rd gen (XL30)

Illustration — use it to know where to look.

Location

Driver's side footwell, directly under the steering column. White 16-pin connector, no cover. Easy to locate without tools.

Also on this Sienna

  • KeysSmart key · Transponder
  • Tools confirmed13
  • Transponder chipSubscribers
  • Programming procedureSubscribers
Open the full Sienna 3rd gen record

Questions

Toyota Sienna OBD questions

4th gen (2021–2025): Left-hand drive only — the XL40 Sienna was never sold in right-hand drive in North America. 3rd gen (2011–2020): Driver's side footwell, directly under the steering column.

Other Toyotas

Found the port. Now program the key.

Step-by-step add-key and all-keys-lost procedures for every Sienna, which of your tools will do it, and what catches people out.

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