Buick Riviera Oxygen Sensor - Select Year

Position: Front
Direct Fit - - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Direct Fit - - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Quality: OEM
Position: Front
OE Connector - - (In Exhaust Manifold Cross- Over- 1 Wire) - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #19211437 - w/ OEM #25166816 -

Quality: OEM
OE Connector - - (In Exhaust Manifold Cross- Over- 1 Wire) - At Catalyst Inlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #19211437 - w/ OEM #25166816 -

Position: Front
Direct Fit - - Before Catalyst - L4 2.5 - V6 2.8 - V6 3.8 - V6 4.1 - V6 4.1 w/ Carburetor - V8 3.8 - V8 4.3 - V8 4.4 - V8 4.9 - V8 5.0 - V8 5.7 - V8 6.0 - w/ Carburetor - w/ EFI -

Quality: OEM
Position: Front
OE Type - - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Quality: OEM
OE Type - - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - California - At Exhaust Manifold Outlet - Exc. Option Code ZN4 - At Exhaust Manifold Outlet - Models made in USA - At Exhaust Manifold Outlet - Models made in USA - w/ Carburetor - Before Catalyst - California - Exc. California - Exc. GNX Series - Exc. Transmission Code 4L60E - Exhaust Manifold - Front - 2 Required Rear - 1 Required - GNX Series - L4 2.5 - w/ Fuel Injected - L6 4.1 - OE Style - 1-Wire - OE Style - 1-Wire - Brougham - OE Style - 1-Wire - Exc. California - OE Style - 1-Wire - L4 2.5 - OE Style - 1-Wire - L6 4.1 - OE Style - 1-Wire - Located at Manifold - OE Style - 1-Wire - Supercharged - OE Style - 1-Wire - V6 2.8 - OE Style - 1-Wire - V6 3.0 - OE Style - 1-Wire - V6 3.8 - OE Style - 1-Wire - V6 4.1 - OE Style - 1-Wire - V8 4.3 - OE Style - 1-Wire - V8 4.4 - OE Style - 1-Wire - V8 4.9 - OE Style - 1-Wire - V8 5.0 - Optional - Supercharged - V6 2.8 - w/ FI - V6 4.1 - w/ EFI - V8 5.7 - w/ 1-Wire Sensor - w/ 4-Bbl. Carburetor - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ Federal Emission System
Before Catalyst (At Exhaust Manifold) - w/ OEM #25166816 -

Quality: OEM
Position: Front
- Before Catalyst - L4 2.5 - V6 2.8 - V6 3.8 - V6 4.1 - V6 4.1 w/ Carburetor - V8 3.8 - V8 4.3 - V8 4.4 - V8 4.9 - V8 5.0 - V8 5.7 - V8 6.0 - w/ Carburetor - w/ EFI -

Position: Front
Direct Fit - - (Before Catalyst) - After Catalyst - At Catalyst Inlet - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - Front/Rear - Front/Rear Front - Front/Rear Front (2-Required) - Front/Rear Front - 2 Required - Front/Rear Front - 2 Required Rear - 1 Requried - Front/Rear Front 2 Required - Front/Rear Rear 2 Required - Front/Rear Rear After catalyst - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Position: Front
Direct Fit - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

Position: Rear
Direct Fit - - (After Catalyst) - After Catalyst - After Catalyst
Except Flex Fuel Engine (Engine Vin - 8th Digit - will be '4') - After Catalyst
w/ Flex Fuel Engine (Engine Vin - 8th Digit - will be '5') - At Catalyst Outlet - Before and After Catalyst - Before and After Cataylst - Late - Located at Exhaust Pipe - Located before Catalyst - Optional - Standard -

Quality: OEM
Position: Front
OE Type - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Before Catalyst - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

Quality: OEM
Position: Front
OE connector - - (After Catalyst) - (Before Catalyst) - (Before Catalytst) - After Catalyst - After Catalyst
(Square Connector) - After Catalyst
Right - At Exhaust Manifold - At Exhaust Manifold
w/ Heated Sensor - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except California Emission System
(Before Catalyst) - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - GVW under 8500 lbs. - Located at Manifold - Position 1 (In Exhaust Manifold/ Crossover) - w/ 4-Wire Sensors
(Before Catalyst) - w/ Canada Built -

Quality: OEM
Position: Front
OE Connector - - (Before Catalyst) - After Catalyst - At Catalyst Inlet or Outlet - At Catalyst Outlet - At Exhaust Manifold Outlet - At Exhaust Manifold Outlet or Catalyst Outlet - At Left or Right Y-pipe Inlet & At Catalyst Outlet - At Y-pipe Inlet & Catalyst inlet or Outlet - Before Catalyst - Before Catalyst
(At Exhaust Manifold- Inline Connector) - Catalyst Inlet or Catalyst Outlet - Exc. Electronic Control Transmission - Front - 2 Required Rear - 1 Required - Front/Rear - Front/Rear Front - Front/Rear Front (2-Required) - Front/Rear Front - 2 Required - Front/Rear Front - 2 Required Rear - 1 Requried - Front/Rear Front 2 Required - Front/Rear Rear 2 Required - Front/Rear Rear After catalyst - GVW under 8500 Lbs. - Position 2 (Includes Inline Connector) (Pre Converter) - w/ 4L60E Transmission
(Before Catalyst) - w/ Electonic Transmission - w/ Electronic Automatic Transmission - w/ Electronic Transmission - w/ or w/o Canada Built - w/ or w/o Canada Built w/ Regular or Flex Fuel Engine -

Quality: OEM
Position: Rear
OE connector - - (After Catalyst) - After Catalyst - After Catalyst
Except Flex Fuel Engine (Engine Vin - 8th Digit - will be '4') - After Catalyst
w/ Flex Fuel Engine (Engine Vin - 8th Digit - will be '5') - At Catalyst Outlet - Before and After Catalyst - Before and After Cataylst - Late - Located at Exhaust Pipe - Located at Manifold - Located before Catalyst - OEM# 25312197 - Optional - Standard -