1986 BMW 735i Speaker Sizes
The 1986 BMW 735i factory audio system features specific mounting locations for various audio components. Front kick panel locations accept 4x6 inch units, while rear deck lid locations accommodate a 5.25 inch speaker size. Compatible speaker types for an audio replacement upgrade include full-range and midbass drivers.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Kick Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1986 BMW 735i Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01986 BMW 735i 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 front kick panel positions in the 1986 BMW 735i may benefit from priority replacement consideration, as these locations typically receive substantial exposure to moisture and temperature fluctuations that can degrade speaker components over time.
- Full-range speakers rated for 4x6 inch openings would handle the complete frequency spectrum without requiring separate tweeters, potentially simplifying the installation process in the kick panel locations.
- The rear deck lid mounting location accepts 5.25 inch speakers with flexibility between midbass and full-range configurations, allowing adjustment based on whether front speakers handle higher frequencies adequately.
- Midbass-specific drivers in the rear deck position could complement front full-range speakers by emphasizing lower frequency reproduction, potentially creating a more balanced soundstage throughout the cabin.
- The 4x6 inch format presents a rectangular mounting pattern that differs from circular speakers, which may limit aftermarket options compared to standard round configurations but still offers viable replacement choices.
- Speaker replacements in both locations could provide noticeable sound quality improvements over factory units, particularly if the original components have experienced typical degradation from age and use.
- The single DIN radio specification indicates a standard head unit size that maintains compatibility with numerous aftermarket receivers should audio source upgrades be considered alongside speaker replacements.
- Pairing the rear 5.25 inch location with midbass drivers might require attention to crossover settings or frequency filtering to prevent overlap with front speaker output ranges.