🚗 Drive with confidence—engineered to keep your GM running like new!
The ACDelco GM Original Equipment 12643955 MAP Sensor is a precision-engineered, factory-recommended replacement part that measures manifold air pressure to optimize fuel injection. Compact and lightweight, it features a durable machined exterior and requires professional programming to ensure perfect integration with your GM vehicle’s engine control system. Made in the USA, it guarantees GM-level quality and reliability.
| Brand | ACDelco |
| Item dimensions L x W x H | 4.1 x 2.1 x 2.1 inches |
| Material | Fuel |
| Item Weight | 0.04 Pounds |
| Style | Modern |
| Maximum Supply Voltage | 14 Volts |
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Specific Uses For Product | Pressure |
| UPC | 707773807132 |
| Global Trade Identification Number | 40707773807130, 00707773807132 |
| Manufacturer | ACDelco |
| Model | MAP Sensor |
| Item Weight | 0.64 ounces |
| Product Dimensions | 4.1 x 2.1 x 2.1 inches |
| Country of Origin | USA |
| Item model number | 12643955 |
| Exterior | Machined |
| Manufacturer Part Number | 12643955 |
| OEM Part Number | 12643955 |
D**G
Added to 1993 Mazda RX-7 with Haltech Elite 1500 ECU
I bought this to add to my 1993 FD RX-7. I was using a GM 3 bar and wanted something with a little more capacity for future boost levels. I didn't find any of the calibrations posted here to be particularly accurate for me, so I rigged up a way to measure and calibrate the sensor in the ECU with an air compressor, digital tire pressure meter(as a comparison) and the internal 3BAR sensor on the Haltech ECU to verify the data. I've attached the pic of the break points that I could measure for anyone else attempting the same!Analog voltage an an AVI input with pull up set to disable in my case.The sensor works great, reads quickly and has been reliable for me so far. Can't complain about the price either!
A**L
Good 3.5 bar sensor
Not much run time on the sensor, but seems to work fine. This is a 3.5 bar sensor, not a 4 bar. 0v = -19.7kPa, 5v = 394.8kPa. I'd include my calibration data, but I can't figure out how to attach an image.
L**O
Horsepower Recovery
My 2.0 turbo charged Malibu lost a lot of horsepower. After changing out a bad spark plug coil it was running better but not like it was when it was a new car. After changing out this sensor my car felt like new again. I gained all of my missing horsepower.
M**I
Great product and great supplier
Great oem 4 bar sensors that can be used with standalone ecms
I**N
Mounting bolt hole unnecessary, part slides n the front
Wrong part for 1999 Chevy S10 4.3 l truck. Mounting bolts is on other side!
M**D
Forget the EFI source 3 bar, Buy this 4 bar MAP sensor
Works great on my MS3 Goldbox using the settings others have posted. I had an EFI source 3 bar but it failed after a year. These sensors are a much better deal
M**E
Did not receive the advertised part.
I received gm part number 25203477, not part number 12643955 as advertised. It looks like part number 12643955 has been replaced by part number 25203477. It should function just fine since they are both 4bar map sensors. Just a heads up.
P**D
Most cost effective 4 Bar MAP sensor
Works great with Holley Terminator X stand-alone ECU, OEM quality and function.
Trustpilot
1 week ago
2 weeks ago
