The 2021 Buick Envision has 3 electrical bulb & socket parts with verified fitment on this page — 2 part types and 3 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
The bulb and socket system on the 2021 Buick Envision covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. All 3 listed parts are Headlamp Socket (2 parts) and Step / Courtesy Light Bulb (1 part).
The 2021 Buick Envision came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
3 brands supply electrical bulb & socket parts for the 2021 Buick Envision, led by ROSTRA (1 part), WELLS (1 part) and GM GENUINE (1 part).
Each part number listed for the 2021 Buick Envision opens a page with every vehicle that part fits.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 610004 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Low Beam | View on Amazon |
| WELLS | 6S1046 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | High Beam and Low Beamwith Factory Halogen Headlights | View on Amazon |
This table covers the sockets that hold a headlamp bulb in the housing. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
2 Headlamp Socket parts are listed for the 2021 Buick Envision, from ROSTRA and WELLS.
Listed part numbers: ROSTRA 610004 and WELLS 6S1046.
Step / Courtesy Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 85051907 | 🇺🇸 US 🇨🇦 CA | Cylinder Type Bulb: No | View on Amazon |
This table covers the bulbs in the step and courtesy lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
This group shows a single part: GM GENUINE 85051907.
Buying Electrical Bulb & Socket Parts for a 2021 Buick Envision
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Confirm you have the 2.0L L4 Turbocharged 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, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Headlamp Socket and Step / Courtesy Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Buick Envision?
Our catalog currently lists 3 electrical bulb & socket parts for the 2021 Buick Envision across 2 subcategories and 3 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2021 Buick Envision?
Common symptoms include a lamp that flickers over bumps, melted or discolored socket plastic, or bulbs that keep failing early on one side. 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, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
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 Buick Envision 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 Buick Envision?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then repeated bulb failure in one position usually means a socket or ground problem, not bad bulbs — replace the socket rather than chase it. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Buick Envision
Electrical Bulb & Socket Parts for Other Buick Envision 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.