Harmony Audio Infiniti G35 Coupe 2003-2004 Stereo Install Kit - Dash

In this review of the Harmony Audio Compatible Infiniti G35 Coupe 2003-2004 Aftermarket Stereo Harness Radio Install Dash Kit, the bottom line is simple: this kit is for owners who want a clean, factory-like installation when replacing the stock radio with a single or double DIN aftermarket unit. The review focuses on fit, retained HVAC functionality, and the included harness and antenna adapters. For anyone replacing a head unit in a 2003 or 2004 G35 coupe and who values an OEM look and preserved climate controls, this kit delivers the core benefits reviewers expect.

Key Features

• Direct fit dash kit: The Metra 99-7604 panel is designed to replace the factory bezel, producing a gapless, factory-style appearance when installing single or double DIN radios.
• HVAC retention: The kit replaces the entire climate control panel while retaining full HVAC functionality so heating and air conditioning controls remain unchanged after installation.
• Storage pocket: Includes a storage pocket beneath the radio opening to keep small items accessible and maintain a finished look.
• Factory vent compatibility: The design retains factory air vents so airflow layout and appearance are preserved during the retrofit.
• Complete wiring adapters: Package includes a Harmony Audio harness adapter and an Infiniti/Nissan factory antenna adapter for compatible electrical and antenna connections.
• OEM-style controls: Soft rubber buttons with backlighting and LEDs reproduce the original control feel and illumination for a consistent dash experience.

Who It's For

The kit is best suited to owners of a 2003 or 2004 Infiniti G35 coupe who plan to install an aftermarket single or double DIN radio and want a professional, factory-like finish without modifying HVAC operation. It is also useful for DIY installers who prefer plug-and-play harness and antenna adapters to reduce wiring time.

Those who should look elsewhere include owners of other model years or different Infiniti/Nissan models, and buyers who require additional features such as integrated steering wheel control adapters or custom trim painting beyond the factory-matched finish supplied.

Pros & Cons

Pros

• Provides a gapless, factory-fit dash opening for single or double DIN radios, improving final appearance.
• Retains full HVAC functionality, so climate controls work exactly as before after install.
• Includes both harness and antenna adapters, simplifying the connection to aftermarket radios.
• Soft rubber backlit buttons keep the OEM look and user experience consistent at night.

Cons

• Customer feedback indicates mixed experiences with fit, so minor trimming or test-fitting may be required in some cars.
• Does not include steering wheel control interface or amplified antenna power adapters, which some installers may need separately.

Specifications

Brand	Harmony Audio / Metra
Fits	Infiniti G35 Coupe 2003, 2004
Kit model	Metra 99-7604 Single/Double DIN
Includes	Dash kit, Metra 99-7604, Harmony Audio HA-707551 harness, antenna adapter
Controls	Replaces climate control panel, retains full HVAC function
Features	Storage pocket below radio, soft rubber backlit buttons

Our Verdict

This Harmony Audio/Metra package is a practical, value-focused solution for 2003-2004 G35 coupe owners who want a clean aftermarket radio installation with preserved HVAC controls and a factory appearance. It is worth buying for installers seeking included harness and antenna adapters, but buyers should be prepared for occasional fit variation and may need extra adapters for steering wheel controls.

Frequently Asked Questions

Will this kit fit other Infiniti models?
The kit is specified for 2003-2004 Infiniti G35 coupe; other models or years are not guaranteed to fit.

Does it retain the original HVAC controls?
Yes, the kit replaces the climate control panel while retaining full HVAC functionality and control operation.

Are wiring and antenna adapters included?
Yes, the package includes the Harmony Audio harness adapter and an Infiniti/Nissan antenna adapter to simplify connections to aftermarket radios.