Tesla OE 1786321-00-A
1786321-00-A is a Tesla part number for the Seat Adjustment Switch Assembly (8-Way) - Left on the Tesla Model 3 (2021 – Dec 2023), Tesla Model 3 Highland (Jan 2024–), Tesla Model Y (Jan 2020 – Jan 2025), Tesla Model Y Juniper (Feb 2025–). MapleV supplies an aftermarket replacement for it at CA$109.00 list, with OE-numbered invoicing and net pricing for approved trade accounts.
What MapleV supplies for 1786321-00-A
| Part | Side | Grade | Fits | List price |
|---|---|---|---|---|
| Seat Adjustment Switch Assembly (8-Way) - Left | Left | Aftermarket | Tesla Model 3 (2021 – Dec 2023), Tesla Model 3 Highland (Jan 2024–), Tesla Model Y (Jan 2020 – Jan 2025), Tesla Model Y Juniper (Feb 2025–) | CA$109.00 |
List prices are public; net pricing for approved trade accounts is shown after sign-in. Availability is confirmed at quote. Same-day Metro Vancouver delivery for qualifying orders placed by 11 AM PT.
Fitment notes
Fits Tesla Model 3 (2021 – Dec 2023), Model 3 Highland (Jan 2024–), Model Y (Jan 2020 – Jan 2025) and Model Y Juniper (Feb 2025–).
Important: Does NOT fit the 2017-2020 Model 3. Every later car takes this switch - the 2021-2023 Model 3, the 2024 Model 3 Highland, the Model Y and the 2025 Model Y Juniper - but the earliest Model 3 uses a different one. Check the model year, and the number on your original switch, before ordering.
Reading 1786321-00-A
| Base number | 1786321 | Identifies the part and its position on the car — the block that survives every revision, and the one to search when a full number returns nothing. |
|---|---|---|
| Middle code | 00 | Distinguishes variants of the base part. We report the code without assigning it a meaning. |
| Revision | A | Engineering revision, issued alphabetically. Where the base number and the middle code both match, a later letter is commonly a newer version of the same part — a search heuristic, not a guarantee. |
Also written as 178632100A. How to read the three blocks: the Tesla part-number guide.
Other numbers with base 1786321
1786321-00-A is the only number with base 1786321 that MapleV cross-references.
Sharing a base number does not mean two parts interchange. The base identifies a family, not a fit: the Model 3 front fascia with parking-sensor holes and the one without are different parts. Always confirm the full number, the side and the year range on the part page before ordering.
Left and right
The right-side counterpart is 1786322-00-B (Seat Adjustment Switch Assembly (8-Way) - Right). Sided parts are not mirror-installable; order the side the estimate names.
Look up another number
Search any Tesla OE number, with or without dashes or by its seven-digit base, in the free OE lookup tool, or browse the full OE cross-reference table.
OE numbers are shown for identification and cross-reference only. MapleV is an independent supplier of aftermarket replacement parts and is not affiliated with, endorsed by, or authorized by Tesla, Inc.