(61311378052)-Daytime Light Relay - 735i/740i/750i (88-94), 525i/530i/535i/540i/M5 (89-95) (Genuine BMW) (2 available)

The genuine BMW part number 61311378052 is a highly specific 7-terminal multi-purpose module officially designated as the Daytime Running Light Relay (or Relay Day-Light-Driving). Manufactured by Hella for BMW, this yellow-topped 12V blade relay is specifically engineered for classic late-1980s and mid-1990s executive models. This relay is responsible for managing the automated electronics of the vehicle's illumination systems. Its primary role is to trigger the daytime running lamps or low-beam safety lights automatically when the vehicle's ignition is active, a feature commonly required or standardized for specific regional export markets (such as Canada and parts of Europe) during that automotive era. 

5 Series (E34 Chassis) — 1989–1995

• 525i, 530i, 535i, and 540i (Sedan and Touring wagons)
• E34 M5 (1991–1993 performance models) 

• 7 Series (E32 Chassis) — 1988–1994
  • 735i and 735iL
  • 740i and 740iL
  • 750iL (V12 flagship sedan)