1991 Mercedes S Class Emission Control Parts
Select Your Submodel
- Denso®Oxygen SensorMercedes S Class 1991, Oxygen Sensor by Denso®. Position: Upstream. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by Denso....High quality plastic and/or steel constructionDirect replacement for a proper fit every time$82.57 - $120.62
- Bosch®Premium Narrow-band Oxygen SensorMercedes S Class 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$66.17 - $95.65
- Bosch®Narrow-band Oxygen SensorMercedes S Class 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$42.29 - $69.55
- Denso®Universal Fit Oxygen SensorMercedes 420SEL / 560SEC / 560SEL 1991, Universal Fit Oxygen Sensor by Denso®. Position: Upstream. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the...Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants$45.63
- Delphi®Oxygen SensorMercedes S Class 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...Resists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long lifePatented sensors construction and design$115.42 - $123.40
- Genuine®Secondary Air Injection Pump Check ValveMercedes S Class 1991, Secondary Air Injection Pump Check Valve by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from...Made with precision and quality in mindDesigned to meet your specific needs$81.24
- Genuine®Secondary Air Injection Check ValveMercedes S Class 1991, Secondary Air Injection Check Valve by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from...Made with precision and quality in mindDesigned to meet your specific needs$25.70
- Pierburg®Secondary Air Injection Pump Solenoid ValveMercedes 420SEL / 560SEL 1991, Secondary Air Injection Pump Solenoid Valve by Pierburg®. 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...24 Months/24,000 MilesMade to provide unequaled quality and reliability$60.98
- MTC®Secondary Air Injection Pump Check ValveMercedes 300SE / 300SEL / 420SEL / 560SEC / 560SEL 1991, Secondary Air Injection Pump Check Valve by MTC®. If you’re looking for replacement parts at reasonable prices, then MTC parts are the way to go. Manufactured by highly...Ideal solution to restore the performance of your vehicleManufactured using high-strength materials for maximum reliability$22.98
- Genuine®PCV Valve HoseMercedes S Class 1991, PCV Valve Hose by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...Made with precision and quality in mindDesigned to meet your specific needs$10.46 - $31.50
- Gates®PCV Valve HoseMercedes S Class 1991, PCV Valve Hose by Gates®. Emission Hose is constructed from high quality materials for durability and maximum service life. Replacement hose effectively restores the emission system to proper operation and...High quality at an affordable priceExpertly made from premium materials$12.16 - $15.90
- Genuine®PCV Valve Hose GrommetMercedes 350SD / 350SDL 1991, PCV Valve Hose Grommet by Genuine®. Location: Valve Cover to Breather Hose. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest...Made with precision and quality in mindDesigned to meet your specific needs$8.34
- URO Parts®Air Distribution HoseMercedes S Class 1991, Air Distribution Hose by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your exhaust...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$6.54 - $35.70
- URO Parts®Engine Crankcase Breather HoseMercedes 420SEL / 560SEC / 560SEL 1991, Engine Crankcase Breather Hose by URO Parts®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with...Made with precision and quality in mindDesigned to meet your specific needs$9.08
- URO Parts®Engine Crankcase Breather Hose ConnectorMercedes 300SE / 300SEL / 350SD / 350SDL / 420SEL / 560SEC... 1991, Engine Crankcase Breather Hose Connector by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$3.23
- Elaplast®Breather HoseMercedes 300SE / 300SEL 1991, Breather Hose by Elaplast®. Location: From Idle Speed Actuator to Intake Manifold. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a...Carefully engineered for proven performanceDesigned for long-lasting service$15.66
- Genuine®Secondary Air Injection Check Valve Cap NutMercedes 300SE / 300SEL / 420SEL / 560SEC / 560SEL 1991, Secondary Air Injection Check Valve Cap Nut by Genuine®. Location: Fuel Pump Valve End. Genuine is here to give you the ultimate in quality and reliability at a cost you can...Made with precision and quality in mindDesigned to meet your specific needs$8.57
- URO Parts®Secondary Air Injection Pump HoseMercedes 300SE / 300SEL From Engine # 093917 1991, Secondary Air Injection Pump Hose by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$5.89 - $6.45
- Vaico®Secondary Air Injection Pump HoseMercedes S Class 1991, Secondary Air Injection Pump Hose by Vaico®. Location: Shut-Off Valve to Air Pump. Designed utilizing the latest technology, this product by Vaico features premium quality and will perform better than advertised....Made with precision and quality in mindDesigned to meet your specific needs$20.28
- ACDelco®Gold™ Oxygen Sensor ConnectorMercedes 420SEL / 560SEC / 560SEL 1991, Gold™ Oxygen Sensor Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.66 - $17.77
- Genuine®EGR Valve Tube FittingMercedes 420SEL / 560SEC / 560SEL 1991, EGR Valve Tube Fitting by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from...Made with precision and quality in mindDesigned to meet your specific needs$7.56
- Davico®Direct Fit Catalytic Converter and Pipe AssemblyMercedes S Class 1991, Catalytic Converter and Pipe Assembly by Davico®. Converter Configuration: Direct Fit. Position: Center. This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged...$457.66 - $629.68
- Walker®CalCat™ Universal Fit Standard Oval Body Catalytic ConverterMercedes 300SE / 300SEL / 420SEL / 560SEC / 560SEL 1991, CalCat™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without Air Tube. Without O2 Sensor...$490.81
- MagnaFlow®Pre-OBDII Universal Fit Catalytic ConverterMercedes S Class with PRE-OBDII Models 1991, Pre-OBDII Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Without Air Tube. OEM Spec. If your car needs a new catalytic converter, install one that will get you...$290.00 - $328.00
- MagnaFlow®Standard Universal Fit Catalytic ConverterMercedes S Class 1991, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Without Air Tube. If your car needs a new catalytic converter, install one that will get you through the smog check. This...$124.00 - $189.00
- TruParts®Exhaust System HangerMercedes S Class 1991, Exhaust System Hanger by TruParts®. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in compliance with rigorous...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$0.49 - $0.98
- Walker®Ultra™ Universal Fit Catalytic ConverterMercedes 300SE / 300SEL 1991, Ultra™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Emissions control for better air quality. Direct Fit catalytic converters, for pre-OBDII models. Universal fit units may...$166.30 - $206.53
- Big End Performance®PCV Breather CapPCV Breather Cap by Big End Performance®. 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 meet your needs and deliver great...$12.39 - $14.91
- Big End Performance®Clamp On PCV BreatherClamp On PCV Breather by Big End Performance®. This Big End Performance product is just the option for you in case you want to get the most out of your auto. It is made from first-rate materials to provide the highest level of quality....High quality at an affordable priceExpertly made from premium materials$16.27 - $18.98
- Granatelli Motor Sports®Valve Cover BreatherValve Cover Breather by Granatelli Motor Sports®. 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 your...Made with precision and quality in mindDesigned to meet your specific needs$15.96
Shop By Service Type
Popular Products
- $20.94 - $25.73
- $132.54 - $178.40
- $166.30 - $490.81
1991 Mercedes S Class Models
Popular Searches