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1999 BMW 328i

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 1999 BMW 328i

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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Crux SWR-A

Steering Wheel Control Retention Interface for Analog SWC

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Steering Wheel Control Retention Interface for Analog SWC

• Retains Steering Wheel Controls
• Retains VR Command
• Works with Sony Radio with CarPlay Function
• Dimension: 3.5" L x 2.5" W x 7" H

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Fits your 328i
1
List price $90.30
-36% $58.05

In stock

• Retains Steering Wheel Controls
• Retains VR Command
• Works with Sony Radio with CarPlay Function
• Dimension: 3.5" L x 2.5" W x 7" H

Metra 81-4300

Universal Speaker Baffles for 5-1/4" and 6-1/2" Speakers

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Universal Speaker Baffles for 5-1/4" and 6-1/2" Speakers

• Universal Speaker Baffles
• Works for 5-1/4" & 6-1/2" Speakers
• Durable ABS Plastic Construction
• Protects the Back of the Speaker
• Reduces Panel Vibration
• Blocks Road Noise
• Creates a Tight Acoustic Seal

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Fits your 328i
25
List price $24.99
-12% $21.99

In stock

• Universal Speaker Baffles
• Works for 5-1/4" & 6-1/2" Speakers
• Durable ABS Plastic Construction
• Protects the Back of the Speaker
• Reduces Panel Vibration
• Blocks Road Noise
• Creates a Tight Acoustic Seal

Limited time!

NVX FRING68

Universal 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

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Universal 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

• 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof automotive-grade high-density foam strips
• Prevents front and rear wave cancellation and panel vibrations
• Designed for use with 6x8" or 5x7" speakers
• Pack of 2

Free Speaker Accessory at Checkout!
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found car based on your search
Fits your 328i
12
List price $29.99
-47% $15.99

In stock

Used from: $11.19
Limited time!

NVX FRING4

Universal 4" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

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Universal 4" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

• 4" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof automotive-grade high-density foam strips
• Prevents front and rear wave cancellation and panel vibrations
• Designed for use with 4" speakers
• Pack of 2

Free Speaker Accessory at Checkout!
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found car based on your search
Fits your 328i
4
List price $18.99
-37% $11.98

In stock

Used from: $5.39
Limited time!

NVX XBAF68

Universal 6x8" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

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Universal 6x8" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

• 6x8" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof foldable silicone baffles with egg crate foam
• Foldable rings allow for perfect fitment at varying depths
• Designed for use with 6x8" speakers
• Pack of 2

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
12
List price $29.99
-27% $21.99

In stock

Used from: $15.39
Limited time!

NVX XBAF525

Universal 5.25" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

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Universal 5.25" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

• 5.25" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof foldable silicone baffles with egg crate foam
• Foldable rings allow for perfect fitment at varying depths
• Designed for use with 5.25" speakers
• Pack of 2

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
9
List price $19.99
-15% $16.99

In stock

Used from: $11.39
Limited time!

NVX FRING525

Universal 5.25" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

FRING525 big
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Universal 5.25" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

• 5.25" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof automotive-grade high-density foam strips
• Prevents front and rear wave cancellation and panel vibrations
• Designed for use with 5.25" speakers
• Pack of 2

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
2
List price $19.99
-45% $10.99

In stock

Used from: $7.69

Stinger Roadkill RKFR5768

3pc FAST Foam Speaker Enhancer System Kit for 5"x7" and 6"x8" Drivers

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3pc FAST Foam Speaker Enhancer System Kit for 5"x7" and 6"x8" Drivers

• F.A.S.T. Ring Kit for 5"x7" and 6"x8" Speakers
• Includes 3 piece foam speaker rings
• Acoustically seals speakers for better sound performance
• Absorbs rear wave, prevents front and rear wave cancellation and reduces panels vibrations

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
6
List price $39.00
-44% $21.99

In stock

• F.A.S.T. Ring Kit for 5"x7" and 6"x8" Speakers
• Includes 3 piece foam speaker rings
• Acoustically seals speakers for better sound performance
• Absorbs rear wave, prevents front and rear wave cancellation and reduces panels vibrations

The Install Bay VXT55

XTC 5" to 5-1/4" Round Foam Acoustic Speaker Baffles

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XTC 5" to 5-1/4" Round Foam Acoustic Speaker Baffles

• Round Foam Speaker Baffles
• For 5" to 5-1/4" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

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found car based on your search
Fits your 328i
16
List price $21.99
-14% $18.99

In stock

• Round Foam Speaker Baffles
• For 5" to 5-1/4" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

Install Bay IBSBF525

2 Speaker Baffle Kit 5.25" Inch - Pkg/Pair

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2 Speaker Baffle Kit 5.25" Inch - Pkg/Pair

• New design silicone with egg wave foam
• Foldable speaker baffle
• No more trimming or cutting
• Better sealing for better sound
• Water tight seal

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
1
List price $38.99
-10% $34.99

Available

Ships in 10-14 days

• New design silicone with egg wave foam
• Foldable speaker baffle
• No more trimming or cutting
• Better sealing for better sound
• Water tight seal

Install Bay IBBAF55

5.25" Foam Acoustic Speaker Baffles

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5.25" Foam Acoustic Speaker Baffles

• Foam Acoustic Speaker Baffles
• Fits 5.25" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
5
List price $13.99
-14% $11.99

In stock

• Foam Acoustic Speaker Baffles
• Fits 5.25" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

Install Bay 6" x 8" Foam Acoustic Speaker Baffles (VXT68)

XTC 6" x 8" Foam Acoustic Speaker Baffles create a tight, acoustic seal behind the speaker to enhance the sound quality

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XTC 6" x 8" Foam Acoustic Speaker Baffles create a tight, acoustic seal behind the speaker to enhance the sound quality

• Standard Acoustic Speaker Baffles
• Includes a pair of 6" x 8" oval baffles
• Made from a waterproof foam
• Creates a tight, acoustic seal behind the speaker to enhance the sound quality
• Compresses and forms to the shape of most installations
• Reduces panel vibration
• Greatly enhances the sound and performance of the speakers

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
1
List price $25.99
-12% $22.99

In stock

• Standard Acoustic Speaker Baffles
• Includes a pair of 6" x 8" oval baffles
• Made from a waterproof foam
• Creates a tight, acoustic seal behind the speaker to enhance the sound quality
• Compresses and forms to the shape of most installations
• Reduces panel vibration
• Greatly enhances the sound and performance of the speakers

Install Bay IBBAF57

5" x 7" Foam Acoustic Speaker Baffles

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5" x 7" Foam Acoustic Speaker Baffles

• Foam Acoustic Speaker Baffles
• Fits 5" x 7" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
2
List price $16.99
-12% $14.99

In stock

• Foam Acoustic Speaker Baffles
• Fits 5" x 7" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

Install Bay 4" Round Shallow Foam Acoustic Speaker Baffles (VXT42)

XTC 4" Round Shallow Foam Acoustic Speaker Baffles create a tight, acoustic seal behind the speaker to enhance the sound quality

VXT42 big
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XTC 4" Round Shallow Foam Acoustic Speaker Baffles create a tight, acoustic seal behind the speaker to enhance the sound quality

• Shallow Foam Acoustic Speaker Baffles
• Includes a pair of 4" round baffles
• Made from a waterproof foam
• Creates a tight, acoustic seal behind the speaker to enhance the sound quality
• Compresses and forms to the shape of most installations
• Reduces panel vibration
• Greatly enhances the sound and performance of the speakers

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
5
List price $19.99
-10% $17.99

In stock

• Shallow Foam Acoustic Speaker Baffles
• Includes a pair of 4" round baffles
• Made from a waterproof foam
• Creates a tight, acoustic seal behind the speaker to enhance the sound quality
• Compresses and forms to the shape of most installations
• Reduces panel vibration
• Greatly enhances the sound and performance of the speakers

Install Bay IBBAF68

6" x 8" Foam Acoustic Speaker Baffles

IBBAF68 big
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6" x 8" Foam Acoustic Speaker Baffles

• Foam Acoustic Speaker Baffles
• Fits 6" x 8" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
3
List price $16.99
-12% $14.99

Available

Ships in 10-14 days

• Foam Acoustic Speaker Baffles
• Fits 6" x 8" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

Install Bay IBBAF42

4" Round Shallow Foam Acoustic Speaker Baffles

IBBAF42 big
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4" Round Shallow Foam Acoustic Speaker Baffles

• Shallow Speaker Baffles
• For 4" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
2
List price $13.99
-14% $11.99

Available

Ships in 10-14 days

• Shallow Speaker Baffles
• For 4" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

Boom Mat 050310

4" Round Speaker Baffles

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4" Round Speaker Baffles

• 4" Round Speaker Baffles
• Maximizes speaker performance
• Dampens vibrations easily
• Water-tight shell for added protection
• Baffle Material: Polyethylene
• Dimensions: 6" W x 6" H x 3.5" D

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Fits your 328i
$17.99

Available

Ships in 10-14 days

• 4" Round Speaker Baffles
• Maximizes speaker performance
• Dampens vibrations easily
• Water-tight shell for added protection
• Baffle Material: Polyethylene
• Dimensions: 6" W x 6" H x 3.5" D

NVX XBAF68 (Open Box, Great)

2 Piece Universal 6"x8” and 5"x7" Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

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2 Piece Universal 6"x8” and 5"x7" Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF68's will last a lifetime

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
List price $29.99
-49% $15.39

In stock

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF68's will last a lifetime

NVX XBAF68 with Sound Damping

2 Piece Universal 6"x8” and 5"x7" Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + NVX SDBSK2 Premium Sound Damping

XBAF68_SDBSK2_ACC_KIT big
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2 Piece Universal 6"x8” and 5"x7" Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + NVX SDBSK2 Premium Sound Damping

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF68's will last a lifetime

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
59
List price $48.73
-28% $34.99

In stock

NVX XBAF525 (Open Box, Good)

2 Piece Universal 5.25” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

XBAF525 big
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2 Piece Universal 5.25” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF65's will last a lifetime

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 328i
List price $19.99
-43% $11.39

In stock

Only 2 Left!

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF65's will last a lifetime

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    FAQ for Universal-Fit Audio & Electronics in 1999 328i

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1999 BMW 328i?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 328i.

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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.