Complex sentence: Patrick Tambay and René Arnoux scored four wins between them and were both in contention for the world championship throughout 1983 but late unreliability cost them both, but Ferrari took the constructors title for the second year in a row.
Split into simpler sentences: Patrick Tambay and René Arnoux scored four wins between them and were both in contention for the world championship throughout 1983 but late unreliability cost them both. However, Ferrari took the constructors' title for the second year in a row.