T20 W21/5W halogen bulb – stop and tail lights dual-filament

The T20 W21/5W bulb is used for brake lights (21W) and rear position lights (5W) in the same dual-filament bulb. It operates on 12V with a wedge base with offset contacts, to prevent incorrect installation. It is very common on recent Japanese and Korean vehicles. Check the reference on your original bulb. AGM Vision offers this reference in stock, with vehicle compatibility sheets.

Access the relevant light or lighting unit, then remove the bulb holder or cover. The T20 W21/5W bulb is removed by simple pressure or by a quarter turn, depending on the base. Insert the new one in the same direction. The operation takes less than 5 minutes. No tools are required in most cases. AGM Vision bulbs are delivered ready to install.

Depending on the reference, the T20 W21/5W bulb may exist in a chrome (silver) version, which masks the color of the bulb when off in clear housings. The coating becomes transparent when hot and lets the light pass through normally. The ECE-approved chrome versions pass the technical inspection. AGM Vision indicates the available versions on each product sheet.

The standard T20 W21/5W bulb lasts on average 800 to 1500 hours for signaling bulbs. The lifespan depends on vehicle vibrations and the number of switching cycles. Turn signal bulbs undergo more cycles. AGM Vision bulbs are selected for their durability and benefit from a warranty.

The T20 W21/5W is a common signalling reference. However, specific versions (chrome, long-life) are rarer in stores. AGM Vision stocks all versions in France, with shipping within 24/48h and payment in 3x/4x free of charge from €45.

The standard T20 W21/5W bulbs, with ECE marking, are approved and compliant with the technical inspection. The approved chrome versions also bear this marking. Check for the presence of the E marking on the packaging or on the glass. AGM Vision specifies the approval on each product sheet.