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1991 BMW 850i

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 1991 BMW 850i

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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Install Bay MIBRBSB19

Universal 19mm Black Momentary Blue LED Switch with Harness

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Universal 19mm Black Momentary Blue LED Switch with Harness

• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Blue LED illuminated ring

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List price $24.99
-12% $21.99

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• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Blue LED illuminated ring

Sundown Audio 4BLK

4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

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4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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List price $6.59
-17% $5.49

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• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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Kicker BT4 (46BT4)

Positive or Negative Brass Battery Terminal with Two 1/0-8 Gauge and One 4-8 Gauge Output

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Positive or Negative Brass Battery Terminal with Two 1/0-8 Gauge and One 4-8 Gauge Output

• BT4 Pos/Neg Battery Terminal. (2) 1/0-8AWG, (1) 4-8AWG
• (2) 1/0-4 Gauge out
• 4-8 Gauge out
• Brass construction

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• BT4 Pos/Neg Battery Terminal. (2) 1/0-8AWG, (1) 4-8AWG
• (2) 1/0-4 Gauge out
• 4-8 Gauge out
• Brass construction

Kicker CWR12G (43CWR12G)

Grille for Select Kicker 12" Subwoofers

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Grille for Select Kicker 12" Subwoofers

• Fits 12" CompR Series Subs
• Includes Mounting Hardware and Screw Covers
• ABS Plastic Design
• Protects Subs

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• Fits 12" CompR Series Subs
• Includes Mounting Hardware and Screw Covers
• ABS Plastic Design
• Protects Subs

Belva BAHNGM

Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

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Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

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• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

Rockford Fosgate Punch GS-35

Surface Mount Mesh Grilles for Rockford Fosgate 3.5" Punch V2 Speakers

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Surface Mount Mesh Grilles for Rockford Fosgate 3.5" Punch V2 Speakers

• 3.5" Punch V2 Surface Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Surface mount design installs directly onto mounting surface
• Ideal for applications that disregard grille height

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• 3.5" Punch V2 Surface Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Surface mount design installs directly onto mounting surface
• Ideal for applications that disregard grille height

Shuriken SK-BT100

12V 100Ah Absorbed Glass Mat (AGM) Rechargeable Battery

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12V 100Ah Absorbed Glass Mat (AGM) Rechargeable Battery

• 12-volt Automotive Absorbed Glass Mat (AGM) Battery
• Sealed Absorbed Glass Mat (AGM) design
• Perfect for 2000 watts car audio stereo systems
• Can be mounted in any position
• Can be fully discharged and re-charged

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NVX XCW151

4000W Peak (2000W RMS) 15" X-Series Dual 1-ohm SPL Subwoofer

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4000W Peak (2000W RMS) 15" X-Series Dual 1-ohm SPL Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Enhanced Woven Fiber Paper Composite Cone
• Custom High Roll Foam Surround
• 30 mm Xmax (One Way)
• Sensitivity: 87.3 dB

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Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

1TRUCK12 - CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil

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1TRUCK12 - CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil

• 5/8" MDF (Medium Density Fiberboard)
• Perfect for Tight Spaces (trucks/hatchbacks)
• Fits Most 12" Subwoofers
• 0.75 CuFt
• fully carpeted
• Fully Caulked and Sealed Tight

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• 5/8" MDF (Medium Density Fiberboard)
• Perfect for Tight Spaces (trucks/hatchbacks)
• Fits Most 12" Subwoofers
• 0.75 CuFt
• fully carpeted
• Fully Caulked and Sealed Tight

JL Audio M6-770STR-S-An

7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Anthracite)

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7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Anthracite)

• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Anthracite

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$37.99

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• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Anthracite

JL Audio M6-770STR-S-Rd

7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Red)

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7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Red)

• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Red

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$37.99

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• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Red

JL Audio M6-770STR-S-Ww

7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Warm White)

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7.7" Trim Ring for Sport Grilles in JL Audio M6 Series Marine Speakers (Warm White)

• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Warm White

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$37.99

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• 7.7" trim ring for sport grilles in M6 speakers
• M6 speakers sold separately
• Color: Warm White

Limitless Lithium Nano-OEM-27AH/MTN

14V 27Ah Lithium Iron Phosphate (LFP) Motorcycle and Powersports Battery with Smart Charger

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14V 27Ah Lithium Iron Phosphate (LFP) Motorcycle and Powersports Battery with Smart Charger

• 14.8-volt Lithium Motorcycle and Powersports Battery with Smart Charger
• Sealed Lithium Iron Phosphate (LFP) design
• Perfect for 2000 - 2500 watt audio systems
• Ideal for primary and secondary battery applications
• Compatible with motorcycle and powersports applications

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• 14.8-volt Lithium Motorcycle and Powersports Battery with Smart Charger
• Sealed Lithium Iron Phosphate (LFP) design
• Perfect for 2000 - 2500 watt audio systems
• Ideal for primary and secondary battery applications
• Compatible with motorcycle and powersports applications

VIPER VSM550

2-Way SmartStart Pro Remote Start, Keyless Entry and Car Alarm Smartphone Module

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2-Way SmartStart Pro Remote Start, Keyless Entry and Car Alarm Smartphone Module

• 2-Way Remote Start, Keyless Entry and Car Alarm Smartphone Module
• Add-on system for your Viper SmartStart-compatible car security systems
• GPS and LTE cellular technology for unlimited range
• Supports multiple vehicles

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List price $199.99
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• 2-Way Remote Start, Keyless Entry and Car Alarm Smartphone Module
• Add-on system for your Viper SmartStart-compatible car security systems
• GPS and LTE cellular technology for unlimited range
• Supports multiple vehicles

Wet Sounds Mastercraft ADP-MC-11

Top Factory Mounting Adapters for MasterCraft Towers

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Top Factory Mounting Adapters for MasterCraft Towers

• Top mount adapters brackets for MasterCraft towers
• Works with ICON8X, REV8X, REV10X
• Also works with ICON8XM, REV8SXM, and REV10SXM via removable flat base mounts
• Includes (2) disc adapters and mounting screws

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• Top mount adapters brackets for MasterCraft towers
• Works with ICON8X, REV8X, REV10X
• Also works with ICON8XM, REV8SXM, and REV10SXM via removable flat base mounts
• Includes (2) disc adapters and mounting screws

Metra 44-RMCF Antenna

4" Carbon Fiber Replacement Antenna Mast with Adapters

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4" Carbon Fiber Replacement Antenna Mast with Adapters

• 4" Carbon fiber printed replacement antenna mast
• Fits into the original antenna location for AM/FM stations
• Easy removable mast design
• Includes adapters to fit stereo connections

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• 4" Carbon fiber printed replacement antenna mast
• Fits into the original antenna location for AM/FM stations
• Easy removable mast design
• Includes adapters to fit stereo connections

Dual MANT16W

16" Marine AM/FM Antenna with Swivel Base and 54" Cable (White)

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16" Marine AM/FM Antenna with Swivel Base and 54" Cable (White)

• Marine stereo AM/FM antenna with flexible mast
• Includes 180° swivel base and 54" antenna cable
• Made with durable steel and corrosion-resistant rubber cover

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• Marine stereo AM/FM antenna with flexible mast
• Includes 180° swivel base and 54" antenna cable
• Made with durable steel and corrosion-resistant rubber cover

Limited time!

Shuriken SK-BT140-BX

Battery Box for SK-BT140

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Battery Box for SK-BT140

• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

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• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

Install Bay 646

Posi-Lock 20-26 AWG Locking Mini Butt Connectors (8-Pack)

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Posi-Lock 20-26 AWG Locking Mini Butt Connectors (8-Pack)

• Posi-Lock Mini Butt Connectors
• Locking Twists Prevent Disconnection
• 20-26 AWG
• Package of 8

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• Posi-Lock Mini Butt Connectors
• Locking Twists Prevent Disconnection
• 20-26 AWG
• Package of 8

Diamond Audio DES84

500W Peak (250W RMS) 8" DES Series Dual 4-ohm Car Subwoofer

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500W Peak (250W RMS) 8" DES Series Dual 4-ohm Car Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Fiber-Reinforced High Strength Paper Cone
• Impedance: Dual 4 ohm
• Sensitivity: 82.1 dB

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$239.99

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    FAQ for Universal-Fit Audio & Electronics in 1991 850i

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1991 BMW 850i?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 850i.

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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.