Start with what is installed
Factory System Overview
The researched base system has a five-inch receiver and four speakers. Premium equipment uses a seven-inch receiver and ten speakers, with features including SiriusXM and HD Radio. Premium speakers are low-impedance units: substituting four-ohm speakers while retaining factory amplification can reduce output. Decide whether the project retains or bypasses the original amplifier before selecting replacements, and match every amplifier to the connected speaker load.
Inspect before ordering
Record the model year, factory audio package and any previous modifications. Listen to every channel and note faults before taking the vehicle apart. A working baseline makes the final checks meaningful.
Guide coverage
Planning guide, not a fitment guarantee. Match wiring, impedance, adapters and removal procedures to the actual vehicle. Photos show selected configurations, not every trim or a complete removal sequence.
Radio Upgrade
Both researched receiver types have single-DIN or double-DIN replacement options when paired with the correct installation kit and interface. On seven-inch systems, the antenna connection is at the factory tuner rather than simply at the face of the radio; amplified systems also require the appropriate connection near the passenger kick-panel amplifier.
Connections and clearance
Make secure insulated connections and leave service length without trapping cables. Check mounting stability, vents, switches and display clearance. A plug that fits physically does not prove amplifier or vehicle-function compatibility.
Test the complete system
Verify reception, source playback, balance, fade and any retained steering-wheel controls. Restore all required dash connections before powering the vehicle for a test, following vehicle safety procedures.
Radio access and integration
Both researched receiver types have single-DIN or double-DIN replacement options when paired with the correct installation kit and interface. On seven-inch systems, the antenna connection is at the factory tuner rather than simply at the face of the radio; amplified systems also require the appropriate connection near the passenger kick-panel amplifier. Account for the necessary cable routing before installation. The researched retention interface does not supply the camera’s reverse-trigger signal, so that function needs a verified vehicle-specific analog connection. Do not guess a wire by color or assume that plugging in the camera video restores automatic reverse operation. Confirm USB, AUX, satellite-radio and steering-wheel-control requirements separately.
Before disassembly
Use the instructions for the exact vehicle and selected installation kit. Support removed trim and the receiver, retain fasteners by location, and stop if the wiring or dashboard differs from the documented configuration.
Shop Speaker Sizes
Browse verified collection categories, then confirm the actual installation requirements. These are not vehicle-specific fitment guarantees.
Center dash, Premium
Browse by size; verify depth, mounting and electrical compatibility.Front sail-panel tweeters, Premium
Browse by size; verify depth, mounting and electrical compatibility.Front doors
Browse by size; verify depth, mounting and electrical compatibility.Rear deck
Browse by size; verify depth, mounting and electrical compatibility.Speaker Upgrades
Confirm which factory system is installed before using the locations below. A nominal diameter alone does not establish basket clearance, mounting pattern or electrical compatibility.
Center dash, Premium
Factory: 3½-inch
Replacement planning: 3½-inch, verify fit
The speaker is retained by two Phillips screws; confirm mounting depth and electrical suitability.
Front sail-panel tweeters, Premium
Factory: Approximately 1.688-inch
Replacement planning: Tweeters, custom fit
Custom mounting and wiring connections are required.
Front doors
Factory: 6¾-inch
Replacement planning: 6½-inch, 6¾-inch
Use the correct brackets and harnesses and inspect panel and window clearance.
Electrical note: Premium low-impedance speakers need a matched amplifier plan.
Rear deck
Factory: 6¾-inch woofers; Premium adds 3-inch tweeters
Replacement planning: Vehicle-verified rear speakers, Tweeters, custom fit
Coupe and sedan trim removal differs. Tweeters need custom mounts and connections.
Rear-deck subwoofer, Premium
Factory: 8-inch
Replacement planning: Subwoofer, verify fit
A replacement can require a mounting adapter or spacer. Verify the basket and grille clearance.
Access and mounting
The front-door woofer installation is distinct from the sail-panel tweeter work, so collect both sets of mounting supplies before starting. Rear-deck access requires more planning. The coupe uses pillar trim with safety-related retainers, while the sedan procedure includes the seat bottom, bolsters, scuff and window trim, and the brake-light connection. Keep every belt correctly routed through the finished deck panel. With Premium equipment, do not assume a rear tweeter can share a full-range replacement connection without considering its filtering and the factory signal arrangement. Check polarity, individual channels and camera operation before closing the interior.
Test before closing
Confirm polarity and each channel at a moderate level. Check window travel, latch operation and wiring clearance. Replace damaged clips and secure every panel without pinching its harness.
Tools
Panel tool; Phillips screwdriver; Small flat-blade screwdriver; Protective cloth; 10mm socket and ratchet for applicable sedan access
Electrical and restraint safety
Follow the vehicle battery-disconnection and restraint-system precautions. Do not probe airbag wiring. Keep the ignition off during connection work and protect exposed conductors.
Before cutting or drilling
Inspect both sides for wiring, glass, fuel lines and safety components. Stop if clearance cannot be verified. Protect cut edges, wear eye protection and restore seat and restraint hardware correctly.
Bass and Amplifier
A Premium rear-deck subwoofer replacement should be test-fitted with its adapter and the trim in place. A larger enclosure in the trunk is another approach, but it requires a suitable bass signal, amplifier and secure mounting. The source gives approximately 40 inches of trunk width and 17 inches of height, with 27/34-inch depth measurements for the researched bodies. Verify those dimensions in the actual car, including the trunk opening and seatback angle, rather than treating them as an enclosure cut list.
Power and protection
Size cable, fusing and grounding for the equipment and run length. Protect the power cable close to its source, following the wiring system requirements. Route cables clear of sharp edges and moving hardware.
Final tuning
Start with conservative gain and crossover settings. Listen for distortion, rattles and missing channels. Check heat, charging-system behavior and unwanted key-off operation before considering the installation finished.
Installation Checklist
Work through the system in stages. Test before replacing trim, then repeat the checks after everything is secured.
- Record the exact vehicle year and audio package.
- Choose whether to retain or bypass the factory amplifier.
- Confirm radio kit, interface and antenna requirements.
- Measure speaker depth, opening and grille clearance.
- Plan safe wire routes, protection and equipment mounting.
- Gather tools and follow the vehicle's safety procedures.
- Label, connect, insulate and secure the wiring.
- Test every speaker channel at a moderate level.
- Check radio sources, phone audio and vehicle controls.
- Set gain and crossovers without audible distortion.
- Secure all trim, seats and safety-related hardware correctly.
- Recheck for rattles, heat and unwanted key-off operation.
Keep a record. Save the equipment models, interface instructions, wiring changes and tuning settings. Clear notes make future service easier and help another installer understand what has changed.
Car audio guides, upgrades and installation planning.
