1991 Buick Riviera Emission Control Parts
- WVE®EGR ValveBuick Riviera 1991, EGR Valve by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize emissions of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$144.60
- Standard®PCV ValveBuick Riviera 1991, PCV Valve by Standard®. No Connector. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Made with precision and quality in mindDesigned to meet your specific needs$13.19
- Walker Products®Oxygen SensorBuick Riviera 1991, Oxygen Sensor by Walker Products®. Position: Upstream. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will...High quality at an affordable priceExpertly made from premium materials$21.30
- Bosch®Premium Narrow-band Oxygen SensorBuick Riviera 1991, Premium Narrow-band Oxygen Sensor by Bosch®. Position: Upstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen...OE Identical ConnectorCompact Design$25.06
- Walker Products®Premium Oxygen SensorBuick Riviera 1991, Premium Oxygen Sensor by Walker Products®. Position: Upstream. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment specifications and test...Improved Engine Response & PerformanceLower Emissions$21.30
- Standard®EGR ValveBuick Riviera 1991, EGR Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Polyester-reinforced silicone diaphragm resists thermal aging in temperatures up to 200°CInjection-molded high-temperature polymer prevents temperature-releated failures$96.88
- NTK®Oxygen SensorBuick Riviera 1991, Oxygen Sensor by NTK®. Position: Upstream. Location: B1S1. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$15.38
- Delphi®Oxygen SensorBuick Riviera 1991, Oxygen Sensor by Delphi®. Position: Upstream. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together...Resists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long lifePatented sensors construction and design$18.92
- ACDelco®Gold™ PCV ValveBuick Riviera 1991, Gold™ PCV Valve by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.13
- Bosch®Narrow-band Oxygen SensorBuick Riviera 1991, Narrow-band Oxygen Sensor by Bosch®. Position: Upstream. The Bosch oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which...OE-EquivalentOE Style connectors and wire lengths$18.87
- ACDelco®Gold™ EGR ValveBuick Riviera 1991, Gold™ EGR Valve by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$181.05
- Standard®Tru-Tech™ EGR ValveBuick Riviera 1991, Tru-Tech™ EGR Valve by Standard®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet...Injection-molded high-temperature polymer prevents temperature-releated failuresDirect-fit OE replacement with expected lifespan of more than 16 million cycles$130.74
- Standard®Vapor Canister FilterBuick Riviera 1991, Vapor Canister Filter by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Made with precision and quality in mindDesigned to meet your specific needs$2.52
- Dorman®OE Solutions™ Vapor Canister FilterBuick Riviera 1991, OE Solutions™ Vapor Canister Filter by Dorman®. Why replace an exhaust pipe because of a corroded, stripped or damaged oxygen sensor bung? Save the pipe and replace the bung with this weld-on replacement. Standard...Repair-friendly solution - this oxygen sensor bung allows replacement of a damaged fitting without replacing the entire exhaust componentUniversal fitment - designed to accommodate standard oxygen sensor threads$2.24
- Standard®PCV Valve GrommetBuick Riviera 1991, PCV Valve Grommet by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...Made with precision and quality in mindDesigned to meet your specific needs$2.42 - $3.84
- Dorman®Help™ PCV Valve GrommetBuick Riviera 1991, Help™ PCV Valve Grommet by Dorman®. This PCV valve grommet is designed to match the fit and function of the original grommet on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this PCV valve grommet is designed to match the fit and function of the original grommet on specified vehiclesRestores functionality - this grommet is made to fit and fully restore part functionality after the original grommet fails$2.21 - $3.61
- Standard®EGR Valve GasketBuick Riviera 1991, EGR Valve Gasket by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...Made with precision and quality in mindDesigned to meet your specific needs$2.83
- Standard®PCV Valve ElbowBuick Riviera 1991, PCV Valve Elbow by Standard®. Hose Tee. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Made with precision and quality in mindDesigned to meet your specific needs$4.57
- WVE®PCV Valve GrommetBuick Riviera 1991, PCV Valve Grommet by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize emissions of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$2.13 - $3.03
- ACDelco®Genuine GM Parts™ Oxygen Sensor GasketBuick Riviera 1991, Genuine GM Parts™ Oxygen Sensor Gasket by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Oxygen Sensors...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5.37
- WVE®Oxygen Sensor ConnectorBuick Riviera 1991, Oxygen Sensor Connector by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$10.69 - $21.00
- MagnaFlow®Standard Direct Fit Catalytic ConverterBuick Riviera 1991, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Direct Fit. With Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". Catalytic Converter Overall...$219.00
- MagnaFlow®Pre-OBDII Universal Fit Round Body Catalytic ConverterBuick Riviera with PRE-OBDII Standard 1991, Pre-OBDII Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...$560.00
- MagnaFlow®Standard Universal Fit Oval Body Catalytic ConverterBuick Riviera 1991, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. With Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet...$126.00
- iD Select®Standard Universal Fit Oval Body Catalytic ConverterBuick Riviera 1991, Standard Catalytic Converter by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.25"....$72.47
- Walker®Ultra™ Direct Fit Large Oval Body Catalytic ConverterBuick Riviera 1991, Ultra™ Catalytic Converter by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Large Oval. With 1 Inlet. With Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length:...$129.57
- Davico®Direct Fit Catalytic Converter and Pipe AssemblyBuick Riviera 1991, Catalytic Converter and Pipe Assembly by Davico®. Converter Configuration: Direct Fit. Position: Front. Catalytic Converter Overall Length: 38.75". Gaskets Not Required. This direct-fit catalytic converter by Davico...$151.24
- Walker®CalCat™ Universal Fit Catalytic ConverterBuick Riviera 1991, CalCat™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Overall Length: 13.25". Specifically designed to comply with the California Air Resources Board (CARB)...$389.23 - $426.39
- Walker®Ultra™ Universal Fit Large Oval Body Catalytic ConverterBuick Riviera 1991, Ultra™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Oval. With 1 Inlet. With Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length:...$148.78
- AP Exhaust®Standard Duty Universal Fit Oval Body Catalytic ConverterBuick Riviera 1991, Standard Duty Catalytic Converter by AP Exhaust®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. With Single Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic...$97.43
Shop By Service Type
Popular Products
Popular Searches