BMW , 5 Series , E12 , 525 (1973-1981)

Overview

The BMW 520/525 E12 is a range of executive cars produced by German automaker BMW from 1972 to 1981. It was the first generation of the 5 Series and served as the company's flagship model.

Design and Features

• Body Style: The E12 520/525 featured a two-box sedan design with a rear hatch.
• Dimensions: Length: 4,445 mm (175 in), Width: 1,685 mm (66.3 in), Height: 1,420 mm (55.9 in).
• Weight: Approximately 1,200 kg (2,646 lbs) depending on the trim level and equipment.
• Wheels and Tires: 6-inch steel wheels with Goodyear tires were standard, while optional 7-inch alloy wheels and Michelin tires were available.
• Interior: The cabin featured a simple dashboard with analog instruments, comfortable seating for four adults, and ample cargo space.

Engines

• Petrol Engines: The E12 520/525 offered two inline-6 engines:
  • M10 engine: 2.0-liter (1,990 cc) capacity, producing 122-145 HP (90-108 kW), depending on the tune.
  • M20B20 engine: 2.0-liter (1,995 cc) capacity, producing 143-160 HP (106-119 kW).
• Diesel Engine: A 2.5-liter (2,498 cc) M21D25 inline-6 diesel engine was also available.

Transmission and Performance

• Manual Transmission: A 4-speed manual transmission with overdrive was standard on most models.
• Automatic Transmission: A 3-speed automatic transmission was optional.
• Performance: The E12 520/525 had a top speed of approximately 180-200 km/h (110-124 mph), depending on the engine and trim level.

Safety Features

• Crash Testing: In the late 1970s, BMW began incorporating safety features into their vehicles. However, crash testing data for individual E12 models is limited.
• Optional Features: Some countries offered air conditioning, cruise control, and other optional equipment for added comfort and convenience.

Production Numbers and Discontinuation

• Total Production: Approximately 625,000 units of the E12 520/525 were produced from 1972 to 1981.
• Discontinuation: The E12 was replaced by the BMW E28 5 Series in 1981.