Kwiksen 2pcs Oxygen Sensor Upstream & Downstream O2 Sensor 1 Sensor 2 Replacement for 1996-1998 Toyota 4Runner 3.4L Manual Trans 4WD, 1995-2000 for Toyota Tacoma 3.4L 4WD Manual Trans Upstream and downstream o2 sensor for 1999-2000 Toyota 4Runner SR5 /Limited-3.4L 4WD; Exc. Calif.; Manual Trans Oxygen sensor 1 and sensor 2 for 1996-1998 Toyota 4Runner SR5 - 3.4L/ Limited - 3.4L Manual Trans; 4WD Sensor 1 and sensor 2 combination for 2000 Toyota Tacoma DLX - 3.4L Limited - 3.4L /Pre Runner - 3.4L/ SR5 - 3.4L Exc. Calif.; 4WD; Manual Trans Upstream o2 sensor 1 and dowwnstream sensor 2 for 1995-1999 Toyota Tacoma SR5 - 3.4L 4WD; Manual Trans Warranty: One year unlimited miles.Please check compatibility chart before buying.