R-22 is used in home a/c systems not cars. r134a is the common refrigerant used in the auto industry. If you mean r1234yf some manufactures used it in 14 or 15 but its not super common. your vehicle is probably r134a.

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12 x5 35d (e70)

03 530i (e39)
02 540i (e39)
97 z3 (e36)
05 630ci (e63) [totaled]