The following lists of light bulbs used in MGA cars. You can click on the part numbers for more details and cross reference part numbers.

MG Series MGA -- (1500 body style) Driver's Handbook
REPLACEMENT BULBS (12-Volts)                                          Lucas
						    Watts            Part No
Headlamps, Home and Export    (R.H.D. -dip left)   42/36  (prefocus)  354
Headlamps, Export and U.S.A.  (L.H.D. -dip right)  36/36  (prefocus)  301
Headlamps, Export (Europe except France)	   45/35  (prefocus)  360
Sidelamp and stop/tail lamp (irreversible)	    6/18  (S.B.C.)    361
Number-plate lamp				       4  (M.C.C.)    222
Panel lights and warning lights			     2.2  (M.E.S.)    987
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MG Series MGA (1500 body style) Service Parts List
REPLACEMENT BULBS (12-Volts)                                 B.M.C. 
						   Watts    Part No.
Headlamps -left dip                                50/40    13H140
Headlamps -right dip (L.H.D. Export and USA)       36/36     3H1893
Headlamps -vertical dip                            45/40     3H921
Headlamps -vertical dip            Com.(C)58918    45/40    13H138
Headlamps -vertical dip -yellow    Com.(C)58918    45/40    13H139
Sidelamp/flasher (irreversibe)                      6/21    1F9026
Tail lamp/flasher (irreversibe)                     6/21    1F9026
Number-plate lamp                                      6    2H4817
Panel lamps and warning lights                       2.2    2H4732
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MG Series MGA 1600 and 1600-MK-II Service Parts List (and Driver's Handbook)
REPLACEMENT BULBS (12-Volts)                                 B.M.C.
                                                   Watts    Part No.
Headlamps (R.H.D. except Sweden) 		   50/40    13H140
Headlamps (R.H.D. Sweden -dip vertical -hooded)    45/40     3H921
Headlamps (L.H.D. Europe except France -dip vert)  45/40    13H138
Headlamps (L.H.D. France -dip vertical -yellow)    45/40    13H139
Headlamps (L.H.D. except Europe -dip right sealed) 50/40   13H141
Stop/tail lamps (irreversibe)                       6/21     1F9026
Number-plate lamp and pilot lamps                      6     2H4817
Panel lamps and warning lights                       2.2     2H4732
Flashing Indicator Lamps                              21     1F9012
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MG Series MGA Twin Cam (and "Deluxe" cars) Service Parts List
REPLACEMENT BULBS (12-Volts)                                 B.M.C.
						   Watts    Part No.
Headlamps (R.H.D. except Sweden) 		   50/40    13H140 
Headlamps (R.H.D. Sweden -dip vertical -hooded)    45/40     3H921
Headlamps (L.H.D. Europe except France -dip vert)  45/40    13H138
Headlamps (L.H.D. France -dip vertical -yellow)    45/40    13H139
Headlamps (L.H.D. except Europe -dip right sealed) 50/40    13H141
Stop/tail lamps (irreversibe)                       6/21     1F9026
Number-plate lamp and pilot lamps                      6     2H4817
Panel lamps and warning lights                       2.2     2H4732
Flashing Indicator Lamps                              21     1F9012
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