F40 M135i CSL Style Yellow DRL LED Module Set AU-BF40CDRL

For F40 1 Series and M135i (2019+), these are CSL-style yellow DRL modules - not a full headlight swap, not a wiring loom, just four discrete LED boards that drop into the existing halogen or LED headlight housings.

• Fits F40 chassis only - confirmed on pre-LCI and LCI models, including M135i with B48 engine
• CSL yellow - true amber output (not white with yellow tint), matched to E46 CSL and E92 M3 GTS references
• Stage 1 fast-road aesthetic upgrade - zero coding, no CANbus errors, no bulb-out warnings
• Track day legal in UK - ECE R87 compliant when installed per manufacturer positioning guidelines
• Includes thermal adhesive tube - for secure mounting inside headlight; no double-sided tape failures on hot days

Search terms this answers: F40 yellow DRL, M135i CSL lights, B48 F40 DRL mod, fast road F40 styling, track day BMW DRL, show car F40 lighting, F40 decat-adjacent styling (it’s not a decat - but it *does* go with one).