The BMW 2000 front turn signal requires a P21W bulb size, while the rear turn signal uses a 1141 bulb size. The replacement chart covers 1969 to 1970 model production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The BMW 2000 uses two distinct bulb standards across its front and rear turn signal positions for the 1969-1970 model years, with the front relying on the ECE-standard P21W and the rear using the ANSI-standard 1141.
The P21W is an ECE-regulated bulb used in European and worldwide markets, operating at 12V with a 21W output through a single filament and a BA15s bayonet base.
The 1141 is an ANSI-regulated bulb used in the US and Canadian markets, sharing the same 12V, 21W single-filament configuration and BA15s bayonet base as the P21W.
Despite the P21W and 1141 sharing identical electrical ratings and the same BA15s bayonet base type, they are governed by different regional standards, ECE and ANSI respectively, which affects their regulatory compliance depending on market.
The BA15s base designation indicates a single-contact bayonet fitting with a 15mm base width, which is the physical mounting interface for both bulb types across all listed positions and years.
Because both bulbs are single-filament designs, neither supports a combined stop and turn signal function from a single bulb, meaning each position serves a dedicated signalling role only.
The BMW 2000 front turn signal specification remains unchanged between 1969 and 1970, with the P21W retained across both model years.
The rear turn signal specification for the BMW 2000 likewise holds constant at the 1141 for both 1969 and 1970.