Metra 99-5816 Installation Kit & 70-5520 Wiring Harness - Ford Focus

In this review of the Metra 99-5816 installation kit bundled with the Metra 70-5520 wiring harness, the bottom line is simple: this pair is for DIYers replacing the factory stereo in compatible Ford vehicles who want a clean, factory-looking finish and a plug-and-play wiring connection. The kit's custom design keeps the original air vents in place and provides a recessed DIN opening and the patented snap-in ISO support system that makes mounting a single or double DIN head unit straightforward, while the harness plugs into the car harness to simplify wiring.

Key Features

• Factory fit: The trim kit is custom designed to retain the factory air vents in their original location so the dash keeps a stock appearance after installation.
• Recessed DIN opening: The recessed opening helps center and protect the aftermarket radio for a neat, integrated look.
• Snap-in support: Metra's patented snap-in ISO support system reduces the need for extra brackets, speeding up installation and alignment.
• Color match: The kit is contoured and painted silver to match the factory dash so the final result blends visually with the OEM interior.
• Plug-and-play harness: The 70-5520 wiring harness plugs into the factory harness and provides power and 4-speaker wiring with a 24-pin connector for compatible 2003-2007 Ford, Lincoln, and Mercury models.

Who It's For

This combination is best for vehicle owners with 2008-2009 Ford Focus models who want to install a single or double DIN radio while preserving the factory vent layout and dash appearance, and for owners of select 2003-2007 Ford, Lincoln, or Mercury vehicles who prefer a harness that plugs directly into the car wiring. It suits DIY installers and professional installers alike thanks to the snap-in support and plug-in harness design.

Those who should look elsewhere are owners of vehicles outside the listed model years and fitments or buyers who require fully custom dash modifications beyond the supplied trim and harness. If you need premium materials for visible vent surfaces, be aware vent quality received mixed comments from some users.

Pros & Cons

Pros

• Fits precisely in compatible Ford Focus dashboards and keeps factory vents in place for a stock look.
• Includes Metra-patented snap-in ISO support that simplifies mounting a single or double DIN radio.
• The wiring harness plugs into the car harness and supplies power and 4-speaker wiring with a 24-pin connector for easier installs.

Cons

• Some customers noted mixed vent quality, so visible vent surfaces may not meet every buyer's expectation.
• Compatibility is limited to the specified Ford Focus years for the trim kit and select 2003-2007 Ford/Lincoln/Mercury models for the harness, so fitment must be checked carefully.

Specifications

Kit model	99-5816
Harness model	70-5520
Fitment (kit)	2008-2009 Ford Focus (Single or Double DIN)
Fitment (harness)	Select 2003-2007 Ford, Lincoln, Mercury vehicles
Connector	24-pin connector
Wiring	Power and 4-speaker wiring
Finish	Contoured and painted silver to match factory dash

Our Verdict

The Metra 99-5816 installation kit paired with the 70-5520 wiring harness is a practical, value-oriented choice for installers updating radios in the specified Ford vehicles; it preserves factory vent placement, simplifies mounting with a snap-in support, and reduces wiring time with a plug-in harness. For those within the compatibility range, it delivers a near-factory appearance and straightforward installation at a fair price.

Frequently Asked Questions

Will this kit keep my factory vents in place?
Yes, the 99-5816 is designed to retain the factory air vents in their original location during installation.

Does the harness plug directly into the car wiring?
Yes, the 70-5520 wiring harness is a plug-and-play style harness that connects to the factory harness and provides power and 4-speaker wiring.

Which vehicles are supported?
The trim kit fits 2008-2009 Ford Focus models for single or double DIN installs; the harness is for select 2003-2007 Ford, Lincoln, and Mercury vehicles and uses a 24-pin connector.