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Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →MAP and BAP sensors can support dependable engine operation by giving the engine control unit pressure information under changing conditions. A MAP sensor measures pressure in the intake manifold; a BAP sensor measures ambient atmospheric pressure. They are engine-management inputs, not demonstrated crash-avoidance devices, and the available sources do not quantify any reduction in crashes from using them.
What MAP and BAP sensors measure
MAP: pressure in the intake manifold
A manifold absolute pressure (MAP) sensor measures pressure inside the engine’s intake manifold. The engine control unit (ECU) can use that signal as part of managing engine operation. Some MAP products also report intake-air temperature, but that feature is not universal. See Bosch’s MAP sensor overview.
BAP: atmospheric pressure outside the engine
A barometric absolute pressure (BAP) sensor measures ambient atmospheric pressure. Unlike MAP, it does not report pressure inside the intake manifold. Ambient pressure changes with altitude and weather, so a BAP reading can help the ECU account for operating conditions. Bosch describes its engine-management system as using barometric readings to maintain an appropriate air-fuel mixture across conditions, from coastal roads to mountain roads (Bosch BAP sensor information).
How these readings relate to on-road safety
Accurate pressure information can help an engine-management system operate appropriately as ambient and intake conditions change. That is a contribution to dependable vehicle operation, not a direct safety intervention. NHTSA describes driver-assistance functions such as automatic emergency braking and lane-departure warning; the reviewed materials do not identify MAP or BAP sensing as those functions (NHTSA driver-assistance technologies).
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- Replaces Part - MAP sensor replaces number: AS321 56028562AA 56028562AB 5033310AC 5149091AA. Please check fitment, part number, and part picture to confirm that the part fits your vehicle
- Compatible with - 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Dodge Ram 1500, 2003-18 Dodge Ram 2500, 2003-18 Dodge Ram 3500, 2008 2009 2010 Dodge Avenger, 2009 Dodge Caliber, 2009-20 Dodge Challenger, 2006-19 Dodge Charger, 2014-15 Dodge Dart, 2004-18 Dodge Durango, 2008-10 Dodge Grand Caravan, 2009-10 Dodge Journey, 2005-08 Dodge Magnum, 2007-11 Dodge Nitro, 2019 Dodge Ram 1500 Classic, 2015-21 Dodge Ram Promaster City
- Compatible with - 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Jeep Grand Cherokee, 2007-11 Jeep Wrangler, 2018-21 Jeep Compass, 2014-21 Jeep Cherokee, 2006-10 Jeep Commander, 2015-18 Jeep Renegade, 2009-10 Volkswagen Routan, 2015-17 Chrysler 200, 2005-19 Chrysler 300, 2008-09 Chrysler Aspen, 2008 Chrysler Pacifica, 2007-10 Chrysler Sebring, 2008-10 Chrysler Town & Country
- Reliability & Stability: HHCSOP Manifold Absolute Pressure maintains precision, even in high-temperature environments. Operating temperature range: -40°c to 125°c, the maximum error between 0℃ and 85℃ is 3%, ensuring efficient engine operation
- Exceptional Performance - Response time is less than 2 milliseconds, our MAP sensor captures vital data during various engine operating loads, and design features a specialized coating to resist harmful chemicals found in the intake manifold, ensuring durability and longevity
There is no substantiated crash-reduction figure for MAP/BAP sensors in the sources cited here. Do not treat a sensor replacement as a way to prevent collisions: a functioning pressure-sensing system supports engine management, while avoiding crashes depends on many other vehicle, driver, and road factors.
Choosing or comparing a sensor
Sensor specifications must suit the particular engine, ECU, and installation. Bosch’s SMP581 is one specific BAP product example, not a general requirement for MAP or BAP sensors.
Rank #2
- [PREMIUM PERFORMANCE] - Bosch Manifold Absolute Pressure (MAP) Sensors provide accurate air pressure measurement to very fine tolerances for efficient engine performance
- [LONGER LIFE] - Extremely sturdy sensor design employs a special coating that provides resistance to harmful chemicals inside the intake manifold
- [INNOVATIVE TECHNOLOGY] - Bosch continually improves its MAP sensor designs with the latest chip technology for optimum vehicle performance
- [SUPERIOR ENGINEERING] - Designed to meet or exceed your vehicle’s original equipment specifications for performance, driveability, economy, and emissions
- [TROUBLE FREE INSTALLATION] - OE identical connector ports and attachment points ensure an exact fit and a trouble free installation process
| Specification to compare | Why it matters | Bosch SMP581 example |
|---|---|---|
| Pressure range | Must cover the application’s expected pressures and relevant overload conditions. | 40–115 kPa for this engine-control product. |
| Accuracy or tolerance | Compare the required accuracy, temperature-related drift, and expected service life. | Pressure tolerance of ≤1.0 kPa, as specified by Bosch. |
| Interface and resolution | The output format must be supported by the ECU and its signal-processing strategy. | SPI interface; 10- or 12-bit resolution. |
| Temperature and environment | The sensor must tolerate the temperatures and conditions at its installation location. | Operating temperature of −40°C to 125°C. |
| Packaging and validation | Connector, mounting, diagnostic support, and system validation must match the application. | Not stated in the cited specification summary. |
These SMP581 figures are Bosch product specifications, not universal sensor specifications (Bosch product information). SAE J1347’s scope includes MAP transducers and barometric ambient absolute-pressure transducers; the catalog entry lists revision date November 1, 1996, so it should not be mistaken for a newly issued standard (SAE J1347_199611).
Diagnosing a suspected pressure-sensor fault
A warning light, drivability symptom, or implausible pressure reading warrants vehicle-specific diagnosis; none proves by itself that the sensor has failed. Bosch Diagnostics describes testing MAP/BARO sensors with a multimeter and hand vacuum pump, while cautioning that implementations and signal formats differ. Follow the service information and pinout for the exact vehicle rather than treating an illustrated GM-style arrangement as universal (Bosch Diagnostics MAP sensor testing guide).
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- Part Number Fitment: 16187556, 9359409, 12614973, 16249939, 8161875560, 8093594090, 38613212, 8162499390, 881731, 9359409, 861249A1, 3861321, AS59, AS155, EC1636, 213-796, 213-351, 213-1742, 213-4434, PS10000, SU1078
- Please confirm your car model and the OE of the part before purchasing to avoid buying the wrong.
- Please confirm your part picture before purchasing to avoid buying the wrong.
- It could correctly replace the original part.
- Thank you!
- Check the vehicle’s fault codes and live ECU data against the manufacturer’s diagnostic procedure.
- Inspect the connector and wiring for damage, poor contact, or other electrical problems.
- Consider intake or vacuum leaks and other faults that could affect pressure readings or engine behavior.
- Use a multimeter, hand vacuum pump, or other test equipment only as directed by the applicable service procedure.
Testing results should be interpreted using the vehicle’s own specifications. A reading that seems unusual without the correct test conditions, reference values, and pinout is not enough to condemn a component.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Replacing a MAP sensor: confirm fitment first
Replacement is appropriate only after diagnosis identifies the sensor as faulty and the correct part is confirmed for the vehicle. Fitment can depend on year, make, model, engine, connector, and original-equipment cross-reference. Bosch lists MAP sensor 0261230289 as one example and provides a vehicle-fitment lookup; that part number is not universal (Bosch MAP sensor listing and fitment lookup).
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- Compatible with DODGE: Ram 2500 Van 5.2L 5.9L 1999-2003, Ram 3500 5.9L 1997-2002, Ram 3500 Van 5.2L 5.9L 1999-2003, Viper 8L 1997-2002
- Compatible with Jeep: Cherokee 2.5L 4.0L 1997-2001, Grand Cherokee 4.0L 5.2L 5.9L 1997-2003, Wrangler 2.5L 4.0L 1997-2002
- Compatible with DODGE: Dakota 2.5L 3.9L 5.2L 5.9L 1997-2003, Durango 3.9L 5.2L 5.9L 1998-2003, Ram 1500 3.9L 5.2L 5.9L 1997-2001, Ram 1500 Van 3.9L 5.2L 5.9L 1999-2003
- Please contact us for a quicker and easier solution,if you meet any problem with the product in one-year-warranty time
- Reference OE Number: 56029405, 5S2434, AS88, PS10022, 225-1030,18091, 1904-98563, SU3033,MAP88,MS37, 225-91030, 22591030, 145-617, 213-2191
Rank #4
- [Vehicle Fitment-1]: Compatible with GMC Canyon 2008-2012, Envoy 2008-2009, Savana 1500 2009-2014, Savana 2500/Savana 3500 2009-2020, Sierra 1500 2009-2021, Sierra 2500 HD/Sierra 3500 HD 2009-2019, Terrain 2010-2011, Yukon 2008-2021, Yukon XL 1500 2009-2014, Yukon XL 2500 2009-2013
- [Vehicle Fitment-2]: Compatible with Chevrolet Avalanche 2009-2013, Camaro 2016-2018, Colorado 2008-2012, fits for Corvette 2014-2016, Cruze 2011-2016, Equinox 2010-2011, Express 1500 2009-2014, Express 2500 2009-2021, Express 3500/Express 4500 2009-2020, Silverado 1500 2009-2020, Silverado 2500 HD 2008-2019, Silverado 3500 HD 2009-2019, Sonic 2012-2018, Suburban 2015-2021, Suburban 1500 2009-2014, Suburban 2500 2009-2013, Tahoe 2008-2021, Trailblazer 2008-2009
- [Vehicle Fitment-3]: ①Compatible with Buick Allure 2010-2010, Regal 2011-2011; ②Compatible with Cadillac CTS 2010-2010, Escalade/Escalade ESV 2009-2021, Escalade EXT 2009-2013, XTS 2015-2019; ③Compatible with Hummer H2 2009-2009, H3 2008-2010; ④Compatible with Saab 9-7x 2008-2009; ⑤Compatible with Isuzu Ascender 2008-2008, i-290 2008-2008, i-370 2008-2008
- [Reference Number]: 12594942, 12644228, 12694725, 12811681, 8125949420, 8126442280, AS394, SKAS394, 12644228, 2MAP0260, MAP186, MP144, V40720573
- [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted engine manifold absolute pressure map sensor. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.
- Look up the vehicle by year, make, model, and engine using the manufacturer’s or parts supplier’s fitment tool.
- Confirm the connector, mounting, and OE cross-reference against the old part and vehicle service information.
- Install and verify the replacement using the vehicle-specific procedure, then recheck fault codes and relevant ECU data.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
