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Ford Mustang Rear Side Marker Light Bulb Replacement Guide
How to change a burnt out rear side marker bulb in the bumper of a revised 5th generation 2010-2014 Ford Mustang.

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2012 Mustang Rear Side Marker
Gently Pry Out At Front Edge
Remove Bulb Housing
This automotive maintenance tutorial was specifically written to assist owners of the updated 5th generation (2010, 2011, 2012, 2013 & 2014) Ford Mustang in changing a burnt out rear side marker light bulb.

Owners of the earlier 5th generation Mustang from 2005 to 2009 and possibly the 4th generation 1994 to 2004 models with similar rear side marker light bulb housings may also find these DIY instructions to be helpful.

A replacement bulb for the 2010 to 2014 Mustang models is part number 194 from manufacturers such as Sylvania, GE, Philips, Eiko and PIAA.

If you would like to have brighter side marker lights, choose some compatible 194 LED bulbs.

The 2005 to 2009 Mustangs use part number 2825 for the rear side marker, which is also a miniature wedge base bulb.

The only tool needed to replace the bulb is a small flathead screwdriver or a plastic pry bar tool used to pry out the housing from the bumper.

1/4 Turn Counter Clockwise
Remove Bulb Socket
Pull Out Old # 194 Bulb
Move to the side of the bumper with the burnt out rear side marker bulb.

You may choose to wrap the tip of your screwdriver with a soft micro fiber cloth to protect the plastic and painted surfaces.

Insert the blade of the small flathead screwdriver in between the front edge of the light housing and the bumper.

Gently pry out the front part of the bulb housing and remove it from the bumper.

Push In New Bulb
1/4 Turn Clockwise
Insert Rear of Housing First
Pull the old bulb straight out of the socket and push in a new # 194 bulb.

You may also use any other miniature wedge base bulb such as the # 168, W5W, 2825 or a compatible LED unit.

Re-insert the socket in to the housing and rotate it 1/4 turn clockwise to lock it in place.

Pop In Clip At Front Edge
Bulb Housing Replaced
Test New Light Bulb
Insert the rear edge of the housing in to the rectangular hole in the bumper first and then gently pop in the retaining clip at the front in place.

Test the new rear side marker bulb by pressing the "Unlock" button on the key fob.

For more, check out my other Ford Mustang Repair & Maintenance Guides.

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