EPROM for BMW 535i (89-93) - found this in a garage drawer. Possibly the Turner/Conforti upgrade that was never installed in my 1989 535i. (gar3-left)
The number 1 267 355 549 (1267355549) is a proprietary Bosch software version calibration number embedded onto the internal EPROM microchip of classic BMW Bosch Motronic Engine Control Units (ECUs). Rather than identifying a physical hardware part number for the car's body, this represents the exact engine fuel-injection mapping and ignition timing software configuration flashed inside the module during production.
Common Vehicle & Hardware Pairings - This specific software calculation sequence is most famously found in classic late-1980s to early-1990s BMW models—predominantly the BMW 3-Series (E30) and 5-Series (E34) equipped with the inline-6 M20 or M50 engines. It normally corresponds with iconic vintage "silver label" or "blue label" Bosch ECUs such as the popular 0 261 200 173 or 0 261 200 351 hardware modules.
The Turner Motorsport 179-500 is a vintage performance EPROM tuning chip designed for classic BMWs equipped with Bosch Motronic engine control units.
Following up on the classic BMW Bosch ECU software number you provided previously (1 267 355 549), this specific Turner performance part number directly relates to that generation of powertrain modification. Developed alongside legendary programmer Jim Conforti, these plug-and-play chips optimize ignition timing and fuel delivery maps to safely unlock more horsepower and torque out of vintage naturally aspirated BMW inline-six engines.
Target Platform Match
- Primary Compatibility: This specific chip version series is most commonly built to re-map the BMW E34 535i or E32 735i running the robust 3.5L M30 inline-6 engine.
- Hardware Pairing: It plugs directly into standard "silver label" Bosch Motronic ECUs ending in part number 0 261 200 179 (matching the "179" prefix in the Turner part number)
