The 2021 Toyota Avanza has one listed electrical switch & relay part: an Ignition Starter Switch from STANDARD MOTOR PRODUCTS, covering the 1.5L L4 — the only engine offered in the 2021 Toyota Avanza. It includes a manufacturer part number and application notes.
On the 2021 Toyota Avanza, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
The part number opens a page with every vehicle that part fits.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | US504 | 🇲🇽 MX | View on Amazon |
This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2021 Toyota Avanza — STANDARD MOTOR PRODUCTS US504.
Buying Electrical Switch & Relay Parts for a 2021 Toyota Avanza
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 1.5L L4 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Starter Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Toyota Avanza?
This page lists one electrical switch & relay part for the 2021 Toyota Avanza: an Ignition Starter Switch from STANDARD MOTOR PRODUCTS, covering the 1.5L L4 engine.
What are the signs of electrical switch & relay problems on a 2021 Toyota Avanza?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Toyota Avanza was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Toyota Avanza?
Every part on this page is matched to the 1.5L L4 engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Toyota Avanza
Electrical Switch & Relay Parts for Other Toyota Avanza Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.