Halogen bulb T20 W21W – wedge base 21 W

The T20 W21W bulb is used for turn signals, the reverse light and the rear fog light. It operates on 12V with a power of 21W. This is the single-filament version of the T20, with a flat wedge base with symmetrical contacts. Check the reference on your original bulb. AGM Vision offers this reference in stock, with vehicle compatibility sheets.

Access the relevant light or lamp, then remove the bulb holder or cover. The T20 W21W bulb is removed by simply pressing 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 W21W bulb may exist in a chrome-plated (silver) version, which masks the color of the bulb when off in clear optics. The coating becomes transparent when hot and lets the light pass normally. The chrome-plated versions ECE-approved pass the technical inspection. AGM Vision indicates the available versions on each product sheet.

The standard T20 W21W bulb lasts on average 800 to 1500 hours for signaling bulbs. The lifespan depends on vehicle vibrations and the number of switching-on cycles. Turn signal bulbs undergo more cycles. AGM Vision bulbs are selected for their durability and come with a warranty.

The T20 W21W 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.

Standard T20 W21W bulbs with ECE marking are approved and compliant with the technical inspection. 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.