This 1973 BMW 3.0CS was acquired by the seller in 2018 from a previous owner who is said to have discovered it in storage in a Southern California garage. Power is from a carbureted 3.0-liter inline-six mated to a five-speed manual transmission, and additional equipment includes a 3.64:1 limited-slip differential, a sunroof, electric windows, and a CD player with USB. The radiator was recored under current ownership along with replacement of the oil pressure sensor, cooling fan, water pump, spark plugs, battery, and more. This E9 is offered with uninstalled air conditioning components, other spare parts, a tool kit, parts receipts from current ownership, and a clean Oregon title in the seller’s name.

The car underwent a color change from Nachtblau to black under previous ownership, though the seller notes that the paintwork has since failed and been scuffed to create a matte finish. A European-style front bumper, a refinished CSL-style air dam, chrome front and side grilles, Italian-market turn signal lenses, and a 3.0CS trunk badge have been added under current ownership. The side marker lights have been removed, with their holes welded closed and painted to match the body. A video showing the welding work prior to paint and the sunroof operation can be viewed here and here.

Staggered 16″x7″ and 16″x8″ Coupe King Alpina-style wheels are wrapped in Westlake tires. The suspension and brakes are said to have been refurbished under previous ownership with Bilstein shocks, Carl Nelson lowering springs, and braided stainless steel hoses. The center steering rod and bushings are also said to have been replaced.

The interior is upholstered in tan vinyl with matching door panels and features electric windows, a partially-installed center console, and a JVC CD player with USB, Bluetooth, and four aftermarket speakers. The wood dash and door panel trim is said to have been refurbished while in the car, the headliner was refurbished, the shift boot has been replaced, and the front window motors updated to those from an E28 5-series. The seller describes a crack in the lower dash as well as slow rear windows.

Instrumentation framed by a Nardi steering wheel consists of a 150-mph speedometer, a tachometer, an analog clock, and gauges for fuel level and coolant temperature. The five-digit odometer indicates 29k miles, of which 300 have been added by the seller. Total mileage is unknown. The dash light for the turn signal turns off while in operation, but reportedly does not affect the functionality of the signals themselves. The air conditioning system has been removed, though components from an E24 6-series are included in the sale. A cold start video has been provided by the seller.

The 3.0-liter inline-six has been modified with Weber carburetors, an electronic ignition setup, and a stronger Bosch starter. The radiator is said to have been recored and an oil change performed under current ownership along with installation of a nine-blade fan and a new water pump, thermostat, oil pressure sensor, and ignition components. An Optima Redtop battery and tie-down have been fitted, while the windshield washer pump, wiring, and tubing remain installed but the replacement tank will need to be connected and tested. A stock air cleaner housing and Weber adapters are included in the sale.

The car was originally equipped with an automatic transmission, which was replaced under previous ownership with a five-speed manual gearbox paired with a 3.64:1 limited-slip differential. Exhaust system modifications include omission of the stock center muffler as well as fitting a replacement front muffler and a rear muffler from an E9.

A tool kit with a BMW cloth rag was refurbished and installed by the seller. Parts receipts from current ownership are included in the sale. Walk around and driving videos can be viewed below, and the seller’s YouTube channel includes videos showing the car being raised from all four jacking points to demonstrate the condition of the rockers and floorpan.