Volvo 1800 type codes
 
P1800 ch# 1-6000
1st 3 digits = Type (182early, 183 later)
4th digit  = Market for assembling (9=England)
5th digit = Gearbox (4=M40, 5=M41)
1st letter (if any) = Steering (V=LHD, H=RHD)
2nd letter (if any) = Year (A=1961)
1800S 1963,1964,1965,1966
1st 3 digits = Type (always 183)
4th digit = 4th digit= Market ( 3=all except US, 4=US)
5th digit = Gearbox (4=M40, 5=M41)
1st letter = Steering (V=LHD, H=RHD)
2nd letter = Year(B=1963,D=1964,E=1965,F=1966)
     
1800S 1967, 1968
1st 3 digits = Type (always 183)
4th digit = Market (3=all except US, 4=US)
5th digit = Gearbox (5=M41)
6th digit = Steering (1=LHD, 2=RHD)
Letter (if any) = Year (M=1967,P=1968)
     
1800S 1969
1st 2 digits = Type (always 18)
3rd digit = Engine (3 = B20B)
4th digit = Market (3=all except US, 4=US)
5th digit = Gearbox (5=M41)
6th digit = Steering (1=LHD, 2=RHD)
Letter (if any) = Year (S=1969)
1800E 1970
1st 2 digits = Type (always 18)
3rd digit = Engine (4 = B20E)
4th digit = Market (3=all except US, 4=US)
5th digit = Gearbox (5=M41)
6th digit = Steering (1=LHD, 2=RHD)
Letter (if any) = Year (T=1970)
     
1800E 1971
1st 2 digits = Type (always 18)
3rd digit = Engine (4 = B20E)
4th digit = ?
5th digit = Gearbox (5=Manual, 6= Aut.)
6th digit = Steering & Market 1=LHD, 2=RHD (All markets except USA &Canda) 3=LHD (USA &Canada)
Letter (if any) = Year (U=1971)
     
1800E 1972 and 1800ES 1972, 1973
1st 2 digits = Type (always 18)
3rd digit = Body (2 = Coupe 3 = Estate )
4th digit = Engine (4=B20E 6=B20F)
5th digit = Design (3=Without sunroof )
6th digit = Gearbox (5=Manual 6=Aut.)
7th digit = Steering & Market 1=LHD, 2=RHD (All markets except USA & Canada)
3= LHD (USA &Canada except California)4=LHD (California)
Letter (if any) = Year (W=1972, Y=1973)