With the 2.2L engines, none of them are prone to BHG problems that I'm aware of. Same thing with the clearcoat; no years to avoid as far as I know. There was a span where there was "sludging" potential, affecting these years, per
this link:
• Camry 4 cylinder from 1997-2001,
• Camry 6 cylinder from 1997-2002,
• Camry Solara 4 cylinder from 1999-2001,
• Camry Solara 6 cylinder 1999-2002,
• Sienna 6 cylinder from 1998-2002,
• Avalon 6 cylinder from 1997-2002,
• Celica 4 cylinder from 1997-1999,
• Highlander 6 cylinder from 2001-2002,
• Lexus ES 300 from 1997-2002 and
• Lexus RX 300 from 1999-2002.