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DS18 PRO-GM8

580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker

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580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker

• 580 watts Peak Each, 190 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 93 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
List price $41.99
-17% $34.95

In stock

Only 1 Left!

DS18 PRO-X8MSE (Sold Individually)

550W Peak (275W RMS) 8" PRO-X Series 8-ohm Midrange Loudspeaker

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550W Peak (275W RMS) 8" PRO-X Series 8-ohm Midrange Loudspeaker

• 550 watts Peak Each, 275 watts RMS Each
• Glossy red steel basket
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97 dB

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found car based on your search
Fits your 525i
$67.95

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DS18 PRO-FR8NEO

500W Peak (250W RMS) 8” PRO-FR Series 4-ohm Full-Range Bullet Loudspeaker

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500W Peak (250W RMS) 8” PRO-FR Series 4-ohm Full-Range Bullet Loudspeaker

• 500 watts Peak Each, 250 watts RMS Each
• Silver Neodymium Bullet tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 99 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
$215.95

In stock

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Diamond Audio MS82NEO2

1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 2-ohm Powersports and Motorcycle Speakers

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1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 2-ohm Powersports and Motorcycle Speakers

• 600 watts Peak Each, 300 watts RMS Each
• Polyethylene-Naphthalate Horn Tweeters
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 2 ohm
• Sensitivity: 96 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
$879.99 /pair

In stock

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DS18 PRO-CF8.2SLN

400W Peak (200W RMS) 8" PRO Series Midrange 2-ohm Motorcycle and Powersports Shallow Loudspeaker

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400W Peak (200W RMS) 8" PRO Series Midrange 2-ohm Motorcycle and Powersports Shallow Loudspeaker

• 400 watts Peak, 200 watts RMS
• Curvilinear Water Resistant Carbon Fiber cone
• Impedance: 2 ohm
• Sensitivity: 95 dB

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Fits your 525i
$199.95

In stock

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• 400 watts Peak, 200 watts RMS
• Curvilinear Water Resistant Carbon Fiber cone
• Impedance: 2 ohm
• Sensitivity: 95 dB

Sundown Audio VEX-12 S8 (Sold Individually)

500W RMS 12" VEX Series Pro-Audio Midrange 8-ohm Speaker (S-VEX128)

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500W RMS 12" VEX Series Pro-Audio Midrange 8-ohm Speaker (S-VEX128)

• 500 watts RMS Each
• Carbon Fiber cone material
• Impedance: 8 ohm

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Install kits available for most vehicles

found car based on your search
Fits your 525i
List price $443.99
-17% $369.99

In stock

Only 2 Left!

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Diamond Audio MS82NEO4

1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 4-ohm Powersports and Motorcycle Speakers

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1200W Peak (600W RMS) 8" MS NEO Series 2-Way Pro Coaxial 4-ohm Powersports and Motorcycle Speakers

• 600 watts Peak Each, 300 watts RMS Each
• Polyethylene-Naphthalate Horn Tweeters
• Waterproof DUPONT™ Kevlar cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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VIP Product Get $88.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits your 525i
$879.99 /pair

In stock

Only 2 Left!

Alpine S2-S40 (Like New (Open Box))

280W Peak (90W RMS) 4" Next Generation S-Series 2-way Coaxial 4-ohm Speakers

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280W Peak (90W RMS) 4" Next Generation S-Series 2-way Coaxial 4-ohm Speakers

• 140 watts Peak Each, 45 watts RMS Each
• 0.8" Cloth Soft Dome Tweeters with in-line crossovers
• Interlaced Carbon-Glass Fiber Composite - IMPP cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
List price $130.00
-37% $82.46 /pair

In stock

Only 1 Left!

Limited time!

Diamond Audio VSP4BMW

160W Peak (80W RMS) 4" VSP Series 2-way 4-ohm Component Speaker Set for select 2003-2025 vehicles from BMW

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160W Peak (80W RMS) 4" VSP Series 2-way 4-ohm Component Speaker Set for select 2003-2025 vehicles from BMW

• 80 watts Peak Each, 40 watts RMS Each
• Silk Dome tweeters
• Reinforced Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85.6 dB

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found car based on your search
Fits your 525i
$499.99

In stock

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Infinity REF407F (INFSPKRF407FUS)

210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

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210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
List price $139.95
-21% $109.95 /pair

In stock

JBL GX428 (JBLGX428AM)

210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

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210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• Soft Dome tweeters with deflector
• Polypropylene Plus One woofer cone material
• Impedance: 2.3 ohm
• Sensitivity: 90 dB

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
$64.95 /pair

Available

Ships in 10-14 days

DS18 PRO-GM8.4PK

1160W Peak (380W RMS) 8” PRO-GM Series Component Midrange 4-ohm Speakers

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1160W Peak (380W RMS) 8” PRO-GM Series Component Midrange 4-ohm Speakers

• 580 watts Peak Each, 190 watts RMS Each
• 1" Aluminum Bullet tweeters
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 94 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
$117.95 /pair

In stock.

Deaf Bonce Machete LW-80A4

200W Peak (100W RMS) 8” Machete Series 4-ohm Midbass Car Speakers

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200W Peak (100W RMS) 8” Machete Series 4-ohm Midbass Car Speakers

• 200 watts Peak Each, 100 watts RMS Each
• Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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Install kits available for most vehicles

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Fits your 525i
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$119.90

Available

Ships in 10-14 days

DS18 EXL-SQ4.0

520W Peak (120W RMS) 4" EXL Series 2 Way Coaxial 3-ohm Speakers

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520W Peak (120W RMS) 4" EXL Series 2 Way Coaxial 3-ohm Speakers

• 260 watts Peak Each, 60 watts RMS Each
• 1" PEI (Polyetherimide) Dome Tweeters
• Fiberglass cone material
• Impedance: 3 ohm
• Sensitivity: 85 dB

1+ offers available
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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
$119.95 /pair

In stock

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Available Offers (2) for DS18 EXL-SQ4.0
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$119.95
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Diamond Audio DMD42

120W Peak (60W RMS) 4" DMD Series 2 Way Coaxial 4-ohm Speakers

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120W Peak (60W RMS) 4" DMD Series 2 Way Coaxial 4-ohm Speakers

• 60 watts Peak Each, 30 watts RMS Each
• 3/4" Silk Dome Tweeters
• Reinforced Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

Free Speaker Accessory at Checkout!
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VIP Product Get $11.00 in rewards to spend later

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
List price $119.99
-8% $109.99 /pair

In stock.

Limited time!

Alpine S2-S40C

280W Peak (90W RMS) 4" S-Series Hi-Res 2-Way Component Car Speakers

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280W Peak (90W RMS) 4" S-Series Hi-Res 2-Way Component Car Speakers

• 140 watts Peak Each, 45 watts RMS Each
• Hi-Res Audio Certified
• 1" Cloth Dome Tweeters
• Adjustable tweeters with threaded removable housing
• Polypropylene, Glass Fiber and Mica cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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VIP Product Get $15.00 in rewards to spend later

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
1
List price $180.00
-17% $149.95 /set

In stock

Diamond Audio DMDX4

180W Peak (60W RMS) 4" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

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180W Peak (60W RMS) 4" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

• 90 watts Peak Each, 30 watts RMS Each
• Dome Tweeters
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 82 dB

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
$109.99 /pair

In stock.

DS18 8XL800N-8 (Sold Individually)

800W Peak (400W RMS) 8" XL Series Midrange 8-ohm Loudspeaker

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800W Peak (400W RMS) 8" XL Series Midrange 8-ohm Loudspeaker

• 800 watts Peak, 400 watts RMS
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 100.7 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
List price $287.99
-17% $239.95

Available

Ships in 10-14 days

Limited time!

Pioneer TS-G1020S

420W Peak (60W RMS) 4" G-Series 2-way 4-ohm Coaxial Car Speakers

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420W Peak (60W RMS) 4" G-Series 2-way 4-ohm Coaxial Car Speakers

• 210 watts Peak Each, 30 watts RMS Each
• 1-3/16" Polyethylene Terephthalate (PET) Balanced Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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Install kits available for most vehicles

additional information required
Fits select locations in your 525i.
Add vehicle details to confirm exact location.
2
List price $65.00
Save 25%
-25% $48.99 /pair

In stock

DS18 PRO-NS8 (Sold Individually)

400W Peak (200W RMS) 8" PRO-NS Series 8-ohm Shallow-mount Full-Range Speaker

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400W Peak (200W RMS) 8" PRO-NS Series 8-ohm Shallow-mount Full-Range Speaker

• 400 watts Peak Each, 200 watts RMS Each
• 1-1/4" Dome Tweeters
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 96 dB

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Install kits available for most vehicles

found car based on your search
Fits your 525i
$79.95

In stock.

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    FAQ for Speakers in 2004 525i

    Q: Can I upgrade or change the Speakers in 2004 BMW 525i?

    A: Yes this page includes all the best Speakers that work in your 525i.

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    • Vehicle produced after 2005: Inside driver's side door
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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.