Original BMW Left Taillight in Body Side Panel, BMW X1 E84 28i, 28iX, and 35iX (2012–2015)

Mounted in the left rear side panel, the Original BMW rear light 63-21-2-990-111 is the factory taillight for the left side of the 2012–2015 BMW X1 E84. BMW's name for it is rear light in the side panel, left, which places it in the body side panel at the back of the vehicle. Taillights in general let drivers behind see a vehicle in darkness and poor weather and show when it is braking or turning. BMW gives the weight as 800 g, or 1.8 lb. The light is made in Germany, sold as one piece, and has been in production since February 2011.

Original BMW Parts carry a 24-month parts warranty.

When a taillight housing is damaged or its seal stops doing its job, water can get inside. Moisture buildup behind the lens and corrosion on the electrical contacts and wires are the signs to look for, and either one can leave the light working poorly. This number is the left-hand light only. BMW uses it across every E84 variant in its fitment, so engine and drivetrain do not affect the choice.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 63-21-2-990-111
• BMW part name: rear light in the side panel, left
• Position: rear left, body side panel
• Weight: 800 g (1.8 lb)
• Production start: February 2011
• Country of manufacture: Germany
• Chassis: E84 X1
• Sold as: one piece
• Warranty: 24 months (Original BMW Parts)

Common Questions

Does a cracked taillight lens mean the light should be replaced?
Yes. A cracked or broken lens lets moisture and dirt into the housing, which can lead to bulb failure and corrosion in the wiring.

Why do the bulbs in my taillight keep burning out?
Frequent bulb failures can come from excessive vibration, poor bulbs, or electrical problems in the wiring harness. Because a harness fault produces the same symptom, the housing is not always the cause.

Fitment & Compatibility

Use the fitment table below to confirm year, make, model, submodel, and any notes tied to your exact vehicle. Pay close attention to engine, chassis, position, and option-specific details before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.