Toyota Sienna vehicle data API: signals, model years and connection options

DIMO gives developers API access to Toyota Sienna vehicle data. Model years 2008 and newer connect with a DIMO device (DIMO LTE R1 or AutoPi). Headline signals include odometer, vehicle speed and vehicle ignition status.

DIMO gives developers API access to vehicle-state data: diagnostics, fault codes, battery and fuel health, odometer, and maintenance signals. The Toyota Sienna connects through a DIMO device, on 2008 and newer model years, and this coverage has been tested. You read the data through the Telemetry API, which is a GraphQL API, using a Vehicle JWT for the specific vehicle. DIMO adds vehicle-state depth on top of GPS tracking; it doesn't replace it.

Signals by connection type

No factory connectivity?

Toyota Sienna model years 2008 and newer have no OEM cloud connection listed. For these years, a DIMO device (DIMO LTE R1 or AutoPi) plugs into the OBD-II port and streams vehicle signals once the owner connects it and consents to sharing.

See the developer quickstart for how owners connect vehicles and grant access.

Events available

• Idling
• Refuel
• Harsh braking

Build it

Query the latest Toyota Sienna signals with the DIMO TypeScript SDK. The vehicle owner must first share access with your app through DIMO Connect.

import { DIMO } from '@dimo-network/data-sdk';

const dimo = new DIMO('Production');
const tokenId = Number(process.env.DIMO_TOKEN_ID); // from DIMO Connect

const developerJwt = await dimo.auth.getDeveloperJwt({
  client_id: process.env.DIMO_CLIENT_ID,
  domain: process.env.DIMO_REDIRECT_URI,
  private_key: process.env.DIMO_API_KEY,
});
const vehicleJwt = await dimo.tokenexchange.getVehicleJwt({
  ...developerJwt,
  tokenId,
});

// Latest Toyota Sienna signals
const data = await dimo.telemetry.query({
  ...vehicleJwt,
  query: `
    query {
      signalsLatest(tokenId: ${tokenId}) {
      powertrainTransmissionTravelledDistance {
        value
        timestamp
      }
      speed {
        value
        timestamp
      }
      isIgnitionOn {
        value
        timestamp
      }
      }
    }`,
});
console.log(JSON.stringify(data, null, 2));

Full walkthrough: Developer quickstart.

FAQ

Source: DIMO vehicle compatibility records. Coverage tested on a connected vehicle. Last verified 2026-11-06.