OEM Replacement LED Headlamp for BYD Tang 2018 to 2022 with part numbers SA3H 4121010B SA3H 4121020B Built with Triple Projector Lens Sequential Flowing DRL and IP68 Sealed Enclosure

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OEM Replacement LED Headlamp for BYD Tang 2018 to 2022 with part numbers SA3H 4121010B SA3H 4121020B Built with Triple Projector Lens Sequential Flowing DRL and IP68 Sealed Enclosur

Description
Yellowed lens, cracked lamp housing or faulty internal LED chips will ruin your driving safety and cause inspection failure on your 2018-2022 BYD Tang DM/DM-i/EV. Our OEM-spec full LED headlight (OE# SA3H-4121010B/SA3H-4121020B) is precision engineered as original factory replacement for all BYD Tang second-gen SUV models from 2018 to 2022. Equipped with factory triple-projector optics and sequential flowing LED daytime running light, this headlight retains original body mounting dimensions and wiring layout to realize plug-and-play installation without panel cutting or wire modification. Manufactured with V0 fireproof shell and IP68 sealed inner space, the lamp matches perfectly with the vehicle’s original 12V electrical module to eliminate dashboard error codes while resisting sun damage and extreme outdoor weather.

Specification

Parameter	Specification
1. OEM Reference Number	Left: SA3H-4121010B; Right: SA3H-4121020B
2. Applicable Car Model	BYD Tang SUV, DM / DM-i / EV All Available Trims
3. Matching Production Years	2018 ~ 2022 Full Model Range
4. Outer Housing Fire Rating	V0 Grade Flame-retardant ABS Plastic Shell
5. Rated Input Current	3.3A Average Working Current under 12V
6. Rated Operating Voltage	12V DC Standard Automotive Power Supply
7. Anti-Vibration Level	Grade4 Shock-resistant Structure for Complex Road
8. Install Position	Front Left Driver Side / Front Right Passenger Side
9. Core Light Construction	Full LED with Independent Triple Projector Design
10. Allowed Storage Humidity	12% ~ 78% Non-condensing Humidity Environment

Core Point
100% OEM Precise Fit for 2018-2022 BYD Tang Series
Matched to factory part codes SA3H-4121010B(left) and SA3H-4121020B(right), this replacement headlight copies every mounting hole and body outline of all 2018~2022 BYD Tang DM, DM-i and EV trims. All positioning lugs and fixing clips follow original mold design for flush fit, no sheet metal trimming needed during installation.
Factory-Grade Triple Projector LED Illumination Performance
Adopts original triple independent projector lamp cup plus sequential flow-style DRL strip, full-LED light source outputs soft anti-glare beam in line with OEM brightness standards. It expands nighttime sight distance effectively and reserves the original aggressive front appearance of BYD Tang SUV.
Tool-Free Plug-and-Play Installation for All Users
Pre-assembled with OEM-spec wiring plugs and internal harness, the headlight enables direct plug mounting. No wire stripping, soldering or vehicle ECU programming is required, suitable for both private DIY car owners and professional auto repair workshops.
High-End Weather & Fire Resistant Structural Build
V0 flame retardant ABS outer shell plus IP68 fully sealed inner cavity together with UV-coated polycarbonate lens prevents yellowing, water leakage and dust accumulation, ensuring stable lamp performance under rainy, snowy or high-temperature environments.
Complete Electrical Matching without Dashboard Warning Code
Tuned to cooperate with BYD Tang’s stock 12V onboard lighting control system, low beam, high beam and sequential DRL all run according to factory preset logic after fitting, which solves the widespread fault-code issue from low-cost aftermarket headlights.

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