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From the Alfa Romeo catalog
C3D–01901Finishing fascia for an Android two-DIN radio in the 159. The creator gives an 11.5 × 19.2 cm radio size, a 13 × 20.2 cm dashboard opening, and printed it in black PETG.
Fits 159 · Tipo 939
C3D–01900Adapter for mounting a standard tweeter on the original 145 tweeter mount. The creator glued the tweeter to the adapter and removed the front grille and bent the tweeter wire pins to fit the available space.
Fits 145 / 146 · 145 / 146 (Tipo 930)
C3D–01899Can holder sized for a 0.5-litre, 67 mm can and designed for the 159.
Fits 159 · Tipo 939
C3D–01898Two-part replacement sun-visor retaining clip. The creator recommends printing the base on its side for strength and using ABS because PLA may fail at cabin temperatures.
Fits 156 · Tipo 932
C3D–01897Clutch-alignment tool for Lampredi two-litre twin-cam engines, explicitly including the 155 Q4. The creator notes that a printed tool is suitable for occasional use.
Fits 155 · Tipo 167
C3D–01896Replacement cover for the Bosch idle-control valve sensor used on the 156 and 166. The creator designed it because the original cover is discontinued separately from the complete sensor.
Fits 156 · Tipo 932 · 166 · Tipo 936