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MTX TERMINATOR35

80W Peak (40W RMS) 3.5" Terminator Series 2 Way Coaxial 4-ohm Car Speakers

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80W Peak (40W RMS) 3.5" Terminator Series 2 Way Coaxial 4-ohm Car Speakers

• 40 watts Peak Each, 20 watts RMS Each
• Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Rear Deck Corner
List price $59.95
-17% $49.95 /pair

In stock

Limited time!

JBL STAGE1 51F (JBLSPKS151F)

300W Peak (60W RMS) 5.25" Stage Series 2 Way Coaxial 4-ohm Speakers

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300W Peak (60W RMS) 5.25" Stage Series 2 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 30 watts RMS Each
• Mylar Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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Fits the following location in your 733i
  • Rear Deck Corner
List price $79.99
Save 38%
-38% $49.99 /pair

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NVX - Worth the Envy - Direct to Consumer Car Audio

JVC CS-DR521

520W Peak (80W RMS) 5.25'' DRVN DR Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

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520W Peak (80W RMS) 5.25'' DRVN DR Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

• 260 watts Peak Each, 40 watts RMS Each
• 1" Polyetherimide Balanced Dome tweeters
• Carbon Mica cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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Fits the following location in your 733i
  • Rear Deck Corner
List price $119.00
-17% $99.00 /pair

In stock

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List price $119.00
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Kenwood KFC-1366S

520W Peak (60W RMS) 5.25" Sport Series 2 Way Coaxial 4-ohm Car Speakers

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520W Peak (60W RMS) 5.25" Sport Series 2 Way Coaxial 4-ohm Car Speakers

• 260 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Fits the following location in your 733i
  • Rear Deck Corner
3
List price $80.00
Save 39%
-39% $49.00 /pair

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MTX TERMINATOR5

140W Peak (70W RMS) 5.25" Terminator Series 2 Way Coaxial 4-ohm Speakers

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140W Peak (70W RMS) 5.25" Terminator Series 2 Way Coaxial 4-ohm Speakers

• 70 watts Peak Each, 35 watts RMS Each
• Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85.3 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Rear Deck Corner
List price $69.95
-14% $59.95 /pair

In stock

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JBL CLUB 644F (JBLSPKCB644F)

240W Peak (80W RMS) 4x6" Club Series 2 Way Coaxial 3-ohms Speakers

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240W Peak (80W RMS) 4x6" Club Series 2 Way Coaxial 3-ohms Speakers

• 120 watts Peak Each, 40 watts RMS Each
• Edge-driven Silk Edge Driven Dome tweeters
• UV-Resistant Polypropylene cone material
• Plus One woofer cone architecture
• Impedance: 3 ohm
• Sensitivity: 92 dB

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  • Kick Panel
List price $129.95
-23% $99.95 /pair

In stock

Deaf Bonce Machete MM-50L

320W Peak (196W RMS) 5.2" Machete Series Midrange 4-ohm Speakers

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320W Peak (196W RMS) 5.2" Machete Series Midrange 4-ohm Speakers

• 160 watts Peak Each, 98 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91.6 dB

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Fits the following location in your 733i
  • Rear Deck Corner
1
$44.90 /pair

In stock

Hertz K 130

440W Peak (110W RMS) 5.25” Uno Series 2-way 4-ohm Component Speakers

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440W Peak (110W RMS) 5.25” Uno Series 2-way 4-ohm Component Speakers

• 220 watts Peak Each, 55 watts RMS Each
• Tweeter-integrated crossover with 6dB/octave output
• 1" PEI (Polyetherimide) Dome tweeters with neodymium magnets
• Water-repellent Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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  • Rear Deck Corner
1
List price $150.00
-33% $99.99 /set

In stock

Cerwin-Vega H52

240W Peak (140W RMS) 5.25" HED Series 2-Way Coaxial 4-ohm Speakers

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240W Peak (140W RMS) 5.25" HED Series 2-Way Coaxial 4-ohm Speakers

• 120 watts Peak Each, 70 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

1+ offers available
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Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
List price $119.99
-17% $99.99 /pair

In stock

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List price $119.99
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Infinity REF-5030cx (REF5030CXAM)

390W Peak (130W RMS) 5.25” Reference Series 3 ohm Component Speaker System

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390W Peak (130W RMS) 5.25” Reference Series 3 ohm Component Speaker System

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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Fits the following location in your 733i
  • Rear Deck Corner
1
List price $249.95
-56% $109.95 /set

In stock

Limited time!

JBL STAGE3 GEN2 58F (STAGE358F)

960W Peak (120W RMS) 5.25" Stage3 Gen2 Series 2-Way Coaxial 4-ohm Car Speakers

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960W Peak (120W RMS) 5.25" Stage3 Gen2 Series 2-Way Coaxial 4-ohm Car Speakers

• 480 watts Peak Each, 60 watts RMS Each
• PEI (Polyetherimide) Balanced Dome Tweeters
• Plus One Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Rear Deck Corner
List price $89.95
-22% $69.95 /pair

In stock

Deaf Bonce Avatar MTU 50LE

280W Peak (140W RMS) 5.2" Tsunami Series Midrange 4-ohm Car Speakers

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280W Peak (140W RMS) 5.2" Tsunami Series Midrange 4-ohm Car Speakers

• 140 watts Peak Each, 70 watts RMS Each
• Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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  • Rear Deck Corner
$29.90 /pair

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Hertz CX 130

300W Peak (100W RMS) 5.25" Cento Series 2-Way Coaxial 4-ohm Car Speakers

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300W Peak (100W RMS) 5.25" Cento Series 2-Way Coaxial 4-ohm Car Speakers

• 150 watts Peak Each, 50 watts RMS Each
• 0.9" Tetolon Dome tweeters
• Semi-Pressed paper with Mica cone material
• Impedance: 4 ohm
• Sensitivity: 92.5 dB

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  • Rear Deck Corner
List price $260.00
$249.99 /pair

In stock

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DS18 EXL-SQ5.25

680W Peak (160W RMS) 5.25" EXL-SQ Series 2-way 3-ohm Coaxial Car Speakers

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680W Peak (160W RMS) 5.25" EXL-SQ Series 2-way 3-ohm Coaxial Car Speakers

• 340 watts Peak Each, 80 watts RMS Each
• 1" PEI (Polyetherimide) Dome tweeters with neodynium magnets
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 86 dB

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  • Rear Deck Corner
$143.95 /pair

In stock

Used from: $100.76

Infinity Primus 503F (INFSPKPR503F)

240W Peak (80W RMS) 5.25” Primus Series 2 Way Coaxial 3-ohm Speakers

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240W Peak (80W RMS) 5.25” Primus Series 2 Way Coaxial 3-ohm Speakers

• 120 watts Peak Each, 40 watts RMS Each
• 1/2" Silk Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

1+ offers available
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Install kits available for most vehicles

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  • Rear Deck Corner
List price $99.95
-30% $69.95 /pair

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Diamond Audio DMD52

160W Peak 5.25" DMD Series 2-way Coaxial Car Speakers

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160W Peak 5.25" DMD Series 2-way Coaxial Car Speakers

• 80 watts Peak Each
• 0.79" Silk Dome Tweeters
• Polypropylene cone material
• Sensitivity: 86 dB

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found car based on your search
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  • Rear Deck Corner
List price $119.99
-8% $109.99 /pair

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Kenwood KFC-1398RS

660W Peak (150W RMS) 5.25" RS Series 2-Way Coaxial 4-ohm Car Speakers

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660W Peak (150W RMS) 5.25" RS Series 2-Way Coaxial 4-ohm Car Speakers

• 330 watts Peak Each, 75 watts RMS Each
• 1" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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  • Rear Deck Corner
List price $130.00
-16% $109.00 /pair

In stock

MB Quart PK1-113

220W Peak (110W RMS) 5.25" Premium Series 2-Way 4-ohm Coaxial Car Speakers

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220W Peak (110W RMS) 5.25" Premium Series 2-Way 4-ohm Coaxial Car Speakers

• 110 watts Peak Each, 55 watts RMS Each
• 1" Magnesium Dome tweeters
• Tunable waveguide tweeter housing
• Pop Paper-Mica Blend cone material
• Curvilinear cone design geometry
• Impedance: 4 ohm
• Sensitivity: 85.9 dB

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List price $169.99
-28% $121.87 /pair

In stock

Hifonics HCC525CX

160W Peak (80W RMS) 5.25" Colossus Classic Series 2 Way Coaxial 4-ohm Speakers

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160W Peak (80W RMS) 5.25" Colossus Classic Series 2 Way Coaxial 4-ohm Speakers

• 80 watts Peak Each, 40 watts RMS Each
• 1" Aluminum Dome Tweeters
• Woven Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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  • Rear Deck Corner
$49.99 /pair

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Rockford Fosgate Punch P152 (Open Box, Great)

160W Peak (80W RMS) 5.25" Punch Series 2-way 4-ohm Full Range Car Speakers

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160W Peak (80W RMS) 5.25" Punch Series 2-way 4-ohm Full Range Car Speakers

• 80 watts Peak Each, 40 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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Fits the following location in your 733i
  • Rear Deck Corner
27
List price $109.99
-15% $93.49 /pair

In stock

Limited time!

Diamond Audio DES525

200W Peak (100W RMS) 5.25" Elite Series 2-way 4-ohm Coaxial Car Speakers

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200W Peak (100W RMS) 5.25" Elite Series 2-way 4-ohm Coaxial Car Speakers

• 100 watts Peak Each, 50 watts RMS Each
• 0.98" Aluminum Dome tweeters
• Composite Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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  • Rear Deck Corner
$199.99 /pair

In stock

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Lowest price in 30 days

JL Audio C2-525 (Open Box, Great)

200W Peak (120W RMS) 5.25” Evolution C2 Series 2-way 4-ohm Component Speaker System

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200W Peak (120W RMS) 5.25” Evolution C2 Series 2-way 4-ohm Component Speaker System

• 100 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Dome tweeters with ferrofluid cooling and damping
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Fits the following location in your 733i
  • Rear Deck Corner
9
List price $329.99
-34% $216.74 /set

In stock

Hertz CK 130 + FREE $100 Gift Card

5.25" Cento Series 2-Way Component Speaker system

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5.25" Cento Series 2-Way Component Speaker system

• 105 Watts Max Each, 35 Watts RMS Each
•Semi Pressed Paper-Mica cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92.5 dB
• Mounting Depth: 2"

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  • Rear Deck Corner
5
List price $580.00
-31% $399.99 /set

Available

Ships in 10-14 days

• 105 Watts Max Each, 35 Watts RMS Each
•Semi Pressed Paper-Mica cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92.5 dB
• Mounting Depth: 2"

Limited time!

Kenwood eXcelon KFC-X463C

200W Peak (60W RMS) 4x6" eXcelon Series 2-Way 3-ohm Coaxial Car Speakers

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200W Peak (60W RMS) 4x6" eXcelon Series 2-Way 3-ohm Coaxial Car Speakers

• 100 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Carbon-Polypropylene Hybrid cone material with diamond array pattern
• Impedance: 3 ohm
• Sensitivity: 86 dB

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  • Kick Panel
6
List price $120.00
$119.99 /pair

In stock

Only 1 Left!

Crunch CS46CX

500W Peak (100W RMS) 4x6" CS Series 2-Way Coaxial 4-ohm Car Speakers

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500W Peak (100W RMS) 4x6" CS Series 2-Way Coaxial 4-ohm Car Speakers

• 250 watts Peak Each, 50 watts RMS Each
• 1" Neo-Mylar Soft Dome Tweeters
• Alpha-Cellulose cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Kick Panel
11
List price $25.99
-8% $23.99 /pair

Available

Ships in 10-14 days

Limited time!

Cerwin-Vega H7462

550W Peak (80W RMS) 4x6" HED Series 2-Way 4-ohm Coaxial Car Speakers

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550W Peak (80W RMS) 4x6" HED Series 2-Way 4-ohm Coaxial Car Speakers

• 275 watts Peak Each, 40 watts RMS Each
• 1" PEI (Polyetherimide) Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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Install kits available for most vehicles

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  • Kick Panel
$59.99 /pair

Available

Ships in 10-14 days

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Infinity Kappa 463XF (INFSPKKA463XFAM)

360W Peak (120W RMS) 4x6" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

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360W Peak (120W RMS) 4x6" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• 1" Silk Edge Driven Dome tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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  • Kick Panel
3
List price $269.95
Save $70.00
-26% $199.95 /pair

Available

Ships in 10-14 days

Diamond Audio DMDX46

150W Peak (50W RMS) 4x6" DMDX Series 2 Way Coaxial 4-ohm Speakers

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150W Peak (50W RMS) 4x6" DMDX Series 2 Way Coaxial 4-ohm Speakers

• 75 watts Peak Each, 25 watts RMS Each
• Impedance: 4 ohm

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Fits the following location in your 733i
  • Kick Panel
$109.99 /pair

In stock.

Limited time!

Earthquake Sound VTEK-MC5

1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

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1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

• 500 watts RMS Each
• 1" Silk Dome Tweeters
• Electroplated Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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  • Rear Deck Corner
List price $249.00
-8% $229.99 /set

In stock.

American Bass SQ-4.6-FR

200W Peak (100W RMS) 4x6" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

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200W Peak (100W RMS) 4x6" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

• 100 watts Peak Each, 50 watts RMS Each
• Swivel 3/4" Neodymium Dome Tweeters
• Glass Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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  • Kick Panel
List price $78.74
-34% $51.73 /pair

In stock.

Limited time!

JBL STAGE2524 (STAGE2 524)

420W Peak (70W RMS) 5.25" Stage2 Series 2 Way Coaxial 4-ohm Speakers

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420W Peak (70W RMS) 5.25" Stage2 Series 2 Way Coaxial 4-ohm Speakers

• 210 watts Peak Each, 35 watts RMS Each
• PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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  • Rear Deck Corner
3
List price $89.99
-44% $49.95 /pair

Available

Ships in 10-14 days

Limited time!

JBL GT7-5C

270W Peak (90W RMS) 5.25" GT7 Series 2 Way Component 4-ohm Speakers

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270W Peak (90W RMS) 5.25" GT7 Series 2 Way Component 4-ohm Speakers

• 135 watts Peak Each, 45 watts RMS Each
• 1-3/16" PEI (Polyetherimide) Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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Fits the following location in your 733i
  • Rear Deck Corner
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List price $149.95
-20% $119.95 /set

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DS18 ZXI-5254

360W Peak (120W RMS) 5.25" ZXi Series 2-way 4-ohm Coaxial Car Speakers

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360W Peak (120W RMS) 5.25" ZXi Series 2-way 4-ohm Coaxial Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• 1" PEI (Polyetherimide) Dome tweeters with neodynioum magnets
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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Install kits available for most vehicles

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  • Rear Deck Corner
$83.95 /pair

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DS18 PRO-CUPOLA3 (Sold Individually)

400W Peak (150W RMS) 5.25" Pro Audio Soft Dome Midrange 4-ohm Loudspeaker

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400W Peak (150W RMS) 5.25" Pro Audio Soft Dome Midrange 4-ohm Loudspeaker

• 400 watts Peak, 150 watts RMS
• Coated non-resonant soft dome material
• Ultra-high sound quality
• Perfect for studio monitors or Hi-Fi applications
• Impedance: 4 ohm
• Sensitivity: 96 dB

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Install kits available for most vehicles

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  • Rear Deck Corner
List price $239.99
-17% $199.95

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DS18 PRO-X5.4M (Sold Individually)

300W Peak (150W RMS) 5.25” PRO-X Series 4-ohm Midrange Loudspeaker

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300W Peak (150W RMS) 5.25” PRO-X Series 4-ohm Midrange Loudspeaker

• 300 watts Peak Each, 150 watts RMS Each
• Red Steel Basket
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
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$44.95

In stock.

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Infinity Reference 5032cfx (REF-5032CFXAM)

270W Peak (90W RMS) 5.25" Reference Series 2 Way Coaxial 3-ohm Speakers

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270W Peak (90W RMS) 5.25" Reference Series 2 Way Coaxial 3-ohm Speakers

• 135 watts Peak Each, 45 watts RMS Each
• Textile Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Rear Deck Corner
List price $130.00
-42% $74.99 /pair

In stock

DS18 PRO-X46.4BM (Sold Individually)

200W Peak (100W RMS) 4x6" PRO-X Series Pro Audio OEM Midrange 4-ohm Loudspeaker

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200W Peak (100W RMS) 4x6" PRO-X Series Pro Audio OEM Midrange 4-ohm Loudspeaker

• 200 watts Peak, 100 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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Install kits available for most vehicles

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  • Kick Panel
$47.95

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JBL CLUB 54F (JBLSPKCB54F)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

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270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

• 135 watts Peak Each, 45 watts RMS Each
• Silk Edge Driven Dome tweeters
• UV-Resistant Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

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Install kits available for most vehicles

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Fits the following location in your 733i
  • Rear Deck Corner
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List price $129.95
-23% $99.95 /pair

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Limited time!

Earthquake Sound F5.25

600W Peak 5.25" Focus Series 2-Way Coaxial 4-ohm Car Speakers

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600W Peak 5.25" Focus Series 2-Way Coaxial 4-ohm Car Speakers

• 300 watts Peak Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
List price $120.00
-10% $107.99 /pair

In stock.

DS18 PRO-X5M

300W Peak (150W RMS) 5.25” PRO-X Series 8-ohm Midrange Car Loudspeaker

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300W Peak (150W RMS) 5.25” PRO-X Series 8-ohm Midrange Car Loudspeaker

• 300 watts Peak Each, 150 watts RMS Each
• Glossy red steel basket material
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 90 dB

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Install kits available for most vehicles

found car based on your search
Fits the following location in your 733i
  • Rear Deck Corner
$44.95

In stock.

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    FAQ for Speakers in 1981 733i

    Q: Can I upgrade or change the Speakers in 1981 BMW 733i?

    A: Yes this page includes all the best Speakers that work in your 733i.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.