part
corroboratedSide- and option-matched replacement mirror glass with carrier
E91 mirror glass varies by side and equipment, so the replacement must match the installed carrier and connections.
COMPLETE GUIDE · WORKSHOP RELEASED
E91 heated mirror-glass replacement
BMW 3 Series Touring · E91 LCI · 320i · N43B20 · Any
A careful low-risk guide to removing one exterior mirror glass, transferring the heater connections, locking the replacement into the carrier and testing adjustment and heat-related wiring.
5/5 steps released · 1 linked source · about 30 minutes when released.
WHAT YOU WILL LEARNnovice path
- Recognise the difference between glass fitment and complete mirror-housing fitment.
- Release a clipped mirror carrier without levering against painted trim.
- Preserve heater wiring polarity and routing.
- Validate mechanical retention and adjustment before driving.
FASTENER PLAN
Know what must be replaced before you start
WrenchGuide tracks fastener material, reuse policy and tightening specification separately. A torque-plus-angle instruction does not automatically mean a fastener is torque-to-yield or single-use; the replacement rule must be verified independently.
0mapped fasteners
No verified fastener map is published for this procedure yet.
WrenchGuide will not guess whether a bolt is aluminium, reusable, torque-to-yield or replace-after-removal, and it will not invent a torque value. Exact vehicle, engine, transmission and drivetrain applicability can change the answer.
Replacement rule and tightening method are different facts.WrenchGuide only labels a fastener replace-after-removal, aluminium or torque-to-yield when the applicable evidence supports that exact statement. Torque + angle is shown as a tightening method, not used as proof of torque-to-yield by itself.
BEFORE YOU START
Parts, tools & supplies
WrenchGuide builds this list from the repair itself. Mandatory items only become hard requirements after their need has verified provenance.
100%Verified requirements still being assembled
Required before start2
tool
corroboratedWide plastic trim tool
A broad plastic tool spreads load while protecting the housing and glass edge.
Recommended1
tool
corroboratedClean fender/door protection cover
Protects adjacent paint while the glass and wiring are handled.
Fitment and approval are separate checks.An OEM/reference number narrows a part search and an oil viscosity narrows a fluid search, but neither replaces the verified vehicle fitment or manufacturer approval. Production date, VIN, engine/transmission, installed hardware and current product data can still matter.
Match every glass and connector feature
+
No visual needed for this step
Follow the written checks and use the linked sources when you need more context.
Stop and get help if
- The replacement omits or adds a connector, has a different carrier, or is the wrong side.
DO THIS~5 min
- Confirm the replacement is for the correct side and E91 body generation.
- Compare glass outline, carrier clips, heater terminals, tint and any auto-dimming connector with the installed unit before releasing it.
- Switch the engine and ignition off, fold the mirror out to its normal working position and protect the door/fender area.
- A mirror can physically resemble the original while lacking heating, dimming or the correct carrier geometry.
- Every visible feature and connector has a corresponding feature on the replacement.
IF SOMETHING GOES WRONGRecovery path
- Keep the original installed and resolve the VIN/option match with the supplier.
Wide plastic trim toolhand-tool · Do not substitute a bare metal screwdriver against the glass or painted housing.
Clean fender/door protection coverother
Side- and option-matched replacement mirror glass with carrier × 1replace with new · Match left/right side, glass curvature, tint, heater terminals and any auto-dimming option to the installed part.
SOURCES & PROVENANCE1 linked
How to change glass for wing mirror on BMW 3 Touring (E91)
AUTODOC CLUB · E91 guide · plastic trim tool · heater connectors · carrier click · function check · accessed 2026-08-13
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MY WORKSHOP JOURNAL
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NOTESAuto-saved locally
Match every glass and connector feature
MY PHOTOS0 / 6
Image only · up to 12 MB each
No personal photos for this step yet.
Take a quick photo before disconnecting or removing something you may need to identify during reassembly.