1990 BMW 325is Speaker Sizes

The 1990 BMW 325is factory audio system includes a front door panel and a rear door panel, where each location accommodates 5.25 inch speakers. Midbass and full-range units serve as compatible speaker types for an audio replacement and upgrade.

Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.

Speaker Details by Location
Location Size Type Notes
Front Door Panel 5.25 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Door Panel 5.25 Midbass / Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low

1990 BMW 325is Speaker Replacement Summary

2 total positions
2 easy to replace
1 high priority
0 professional only

Replacement difficulty:

Low: 2 Medium: 0 High: 0

Replacement priority:

High: 1 Medium: 1 Low: 0

1990 BMW 325is Radio Slot Size (DIN)

DIN Type Size (inch) Size (mm) Notes
Single DIN 7"×2" 180×50 Standard size for basic car radios with small display or no display
  • Always measure the slot before purchasing a new radio
  • Check slot depth - it may vary

Additional Notes

  • The 1990 BMW 325is door panel speaker locations accept either midbass drivers or full-range speakers, offering flexibility in system configuration based on whether separate tweeters will be incorporated or if a single-driver solution is preferred.
  • Replacing factory speakers in both front and rear positions maintains uniform sizing at 5.25 inches, which simplifies component selection when planning a complete interior audio refresh.
  • Full-range speakers in these positions would handle the entire frequency spectrum independently, while midbass drivers would typically pair with separate high-frequency components for a more segmented approach to sound reproduction.
  • The single DIN radio opening provides standard aftermarket head unit compatibility, potentially enabling enhanced signal processing and power delivery to upgraded speaker components.
  • Sound quality improvements would likely come from replacing aging factory paper cone speakers with modern materials such as polypropylene or treated composite cones that offer better damping characteristics and durability.
  • Component speaker systems utilizing the midbass option generally provide greater control over crossover points and frequency distribution compared to full-range alternatives in the same mounting locations.