Specs
Install
Features
- Direct replacement for Audi A4 Avant tail light bulbs
- 16 high-power LEDs arranged on all four sides
- Increased output with LED Appearance.
- Plug and play, no modification with factory 921 bulb size
- 320 lumens (initial output), 60 lumens (stable output).
Overview
Upgrade. Add more light output and a modern appearance to your Audi A4 Avant with the 921 XPR brake light bulbs. Each of the four sides of these bulbs are populated with 4 high power LEDs for maximum brightness. Housed in an aluminum casing with a textured finish for superior heatsinking properties, the XPR will last for years to come. Best of all, installation only takes minutes - simply take out your factory bulb and the XPR will fit snugly in the socket.
Brightness. At 60 lumens, the XPR will provide significantly more output than your factory bulb. All Diode Dynamics LED lighting is rated with accurate, measured lumen figures, not calculations or guesses. We test the true output in-house, and provide you the real numbers to compare.
Reliability. Diode Dynamics LEDs are built with constant-current inductive circuitry, along with transient suppression. They are tested by our engineering team with a device that replicates years of voltage spikes, like the ones generated each time the alternator starts and stops on your A4 Avant. This is what kills most LED bulbs over time, but just like factory components, Diode Dynamics LEDs are designed with built-in circuit protection. While more expensive than simple bulbs, this allows Diode Dynamics LEDs to last for years, with no flickering or failure.
Experience. After over a decade in business, Diode Dynamics is one of the most trusted names in automotive LED lighting. We directly assemble and engineer our own products in the United States, allowing for higher quality and performance, with the newest and brightest LED technology. Whether it's a Audi or anything else, we pride ourselves in offering only the best possible LED solutions. Please contact us if you'd like to discuss your lighting project!
Bulb Options
921 XPR - More details
- 16 high-power LEDs arranged on all four sides.
- Fully metal heatsinking for maximum output.
- Inductive constant-current drive circuit.
- 60 lumens per bulb.
What's Included
Fitment
Specifications
What's Included
Installation
Installation Time: 10-20 minutes
Tools Needed: Basic Toolset
Installation Guide: Click to download
Warranty
3 Year Replacement Limited Warranty
All Diode Dynamics products come with a 3 Year Worry-Free Warranty.
If you experience any defect with a product, we will do some quick troubleshooting, and if necessary, provide a replacement. There is no need to wait for a return and repair process. Click here to learn more.
