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Front Wiring Harness for Tesla Model S (2016-2021) - Front Radar Bumper | 1004420-04-T
The Radar’s Silent Messenger in Your Model S
Beneath your Tesla Model S’s front bumper lies a critical link between safety and precision: the 1004420-04-T wiring harness. It’s not just wires—it’s the dedicated channel that carries data from your front radar to the car’s computer, making features like adaptive cruise control, forward collision warning, and automatic emergency braking work. For 2016-2021 Model S owners, this harness is the reason your radar doesn’t just “see” obstacles, but communicates them instantly—turning split-second detections into life-saving actions.
What It Actually Does (No Tech Jargon)
Radar-to-Brain Communication: Your front radar scans the road 100 times per second, tracking cars, cyclists, and even sudden obstacles. This harness sends that data to your Model S’s computer at lightning speed—so when a car slams on brakes ahead, your Tesla reacts before you can blink.
Power to Precision Tools: It delivers steady voltage to the radar module, ensuring it doesn’t glitch in extreme heat (like desert summers) or cold (sub-zero winters). A weak harness? It can make your radar misread distances, turning “safe following distance” into guesswork.
Sync with Other Systems: Works with your front camera and brake control module, so when the radar detects danger, the harness ensures the brakes, warning chimes, and dash alerts all activate in unison. No lag, no mixed signals.
How to Spot It’s Failing
Your Model S will show signs—don’t brush them off:
Radar Error Messages: “Front Radar Unavailable” or “Cruise Control Disabled” popping up randomly. These aren’t just annoyances—they mean your safety net is fraying.
Jerky Adaptive Cruise: The car speeds up or slows down unpredictably on the highway. The harness might be sending delayed or garbled data from the radar to the computer.
Late Collision Warnings: Alerts come too late (or not at all) when a car pulls out in front of you. A faulty harness can slow the radar’s signal, costing precious milliseconds.
Intermittent Functionality: Features work fine one day, fail the next—especially in rain or humidity. Water seeping into worn harness insulation is often the culprit.
Why It Outlasts Cheap Replacements
Aftermarket harnesses treat radar wiring like an afterthought. This one? Built like Tesla intended:
Shielded for Clarity: Wrapped in a metal mesh shield that blocks electromagnetic interference from your Model S’s motors and batteries. No “static” in the radar signal, even at high speeds.
Tough Enough for the Elements: Insulation rated to withstand -40°F to 185°F, with a rubberized outer layer that repels water, road salt, and debris. It’s tested to survive 1,000+ hours of salt spray—critical for coastal or snowy drivers.
Connectors That Lock Tight: Gold-plated terminals with a “click” fit that won’t loosen over time. No more wiggling wires to get the radar working again.
Model S-Specific Fit: Engineered only for 2016-2021 Model S front bumpers, with pre-routed lengths that tuck neatly around the radar module. No cutting, no splicing—just a clean install.
What You Get (And Why It Matters)
1x Front Radar Bumper Wiring Harness (1004420-04-T)
A photo guide showing exactly where it routes behind the bumper (no more guessing which clip goes where)
2-year warranty covering defects—we stand behind its ability to keep your radar talking.
Pro tip: Professional installation is recommended. You’ll need to remove the front bumper (about 45 minutes with basic tools) to access the radar module, but it’s worth it to ensure the harness is shielded properly.
Your Radar Deserves a Reliable Voice
A glitchy harness turns your Model S’s advanced radar into an expensive paperweight. This one ensures it speaks clearly, keeping adaptive cruise smooth and collision warnings on time.
Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab... Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab...
