BRAND NEW *OEM Quality* 2.5 Bar boost pressure sensor to suit Porsche 911 Carrera S and GTS with 3.8L flat-six MA1.03 engine.

MAP sensor failure on a Porsche 911 is straightforward to diagnose but OEM parts are expensive. This direct-fit replacement against 038906051B is the same specification used in VAG Group applications and restores correct manifold pressure sensing on the MA1.03 engine. Shipped from Melbourne.

TO SUIT

Suits Porsche 911 Carrera S (991.1) and 911 GTS (991.1) with 3.8L flat-six engine code MA1.03. The 991.1 Carrera S uses a twin-port charged injection system where MAP sensor data is combined with throttle position and MAF data for fuel delivery calculation. Unlike turbocharged VAG applications the 991.1 is naturally aspirated - the sensor here monitors intake manifold vacuum and atmospheric pressure rather than boost. Confirm OEM 038906051B matches before ordering.

OEM PART NUMBERS

038906051B
03G906051D
038906051D
PF100636PB

OTHER PART NUMBERS

NTY: ECM-AU-000
VEMO: V10-72-1039
BOSCH: 0261230266
BOSCH: 0281002399
HELLA: 6PP009400-471
WALKER PRODUCTS: 225-1094

PACKAGE INCLUDES

1 x OEM Quality 2.5 Bar Boost Pressure MAP Sensor (4-Pin plug)

ABOUT THIS SENSOR

The Porsche 911 MA1.03 engine shares key sensor specifications with VW Group engines through the shared supplier network. On the naturally aspirated 3.8 flat-six the MAP sensor monitors intake manifold pressure for load calculation - it operates at a lower pressure range than turbocharged VAG equivalents but uses identical hardware.

On the 991.1 Carrera S MAP sensor failure typically shows as slightly erratic idle and a flat spot at high RPM where the ECU cannot accurately calculate load. Symptoms are subtle compared to turbocharged applications but will trigger P0105-series codes on a PIWIS scan and may cause the vehicle to fail emissions testing in some Australian states.

COMMON SYMPTOMS OF FAILURE

Fault codes P0105 P0107 P0108 on PIWIS scan
Erratic idle on warm restart
Flat spot above 5000 RPM under hard acceleration
Minor fuel economy reduction at highway speeds
Occasional EML without obvious drivability impact
Cold start enrichment longer than normal in winter

What fault codes does a faulty MAP sensor trigger?

A faulty MAP sensor typically triggers codes P0105 to P0109. P0105 indicates a circuit malfunction, P0106 indicates the signal is out of range, P0107 and P0108 indicate the signal is too low or too high respectively, and P0109 indicates an intermittent circuit fault. These codes combined with symptoms such as poor idle and black smoke are strong indicators of MAP sensor failure.

How do I test a MAP sensor?

With an OBD2 scanner in live data mode, the MAP sensor should read close to atmospheric pressure (around 101 kPa) with the engine off, and drop to 30 to 50 kPa at idle with the engine running due to manifold vacuum. Under wide open throttle the reading should rise back toward atmospheric. A sensor that reads flat or does not respond to throttle changes has failed. You can also test supply voltage and signal output with a multimeter.

Can I drive with a faulty MAP sensor?

You can drive short distances but engine performance will be noticeably degraded. The ECU uses the MAP sensor to calculate fuel delivery - a faulty sensor causes incorrect fuelling which leads to poor economy, rough running, and increased emissions. On turbocharged engines a faulty MAP sensor can also prevent boost control from operating correctly. Replace it as soon as possible to avoid further damage.

What does a MAP sensor do?

The Manifold Absolute Pressure (MAP) sensor measures intake manifold pressure to help the ECU calculate the correct fuel and ignition timing. It is critical for engine efficiency, particularly on turbocharged and supercharged vehicles.

What are the symptoms of a faulty MAP sensor?

Symptoms include poor acceleration, rough idle, excessive fuel consumption, black smoke, engine hesitation, and a Check Engine light with codes P0105-P0109. Turbocharged vehicles may also experience boost control issues.

What is the difference between a MAP sensor and a MAF sensor?

A MAF (Mass Air Flow) sensor directly measures the mass of air entering the engine. A MAP sensor measures manifold pressure and the ECU calculates air mass from that reading. Many vehicles use one or the other; some use both. They are not interchangeable.

Identification
SKU	CMS248-Porsche
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CMS248
Reference OEM Number	038906051B
Other OEM Numbers	038906051B, 03G906051D, 038906051D, PF100636PB
Related Part Numbers	CMS248, MAP1149, PS10118, 0281002400, DS-LDF6-T
Trade Part Numbers	NTY: ECM-AU-000, VEMO: V10-72-1039
Product Specifics
Product Type	SENSOR
Sensor Type	Manifold Absolute Pressure (MAP) Sensor
Fitting Position	Intake Manifold
Number of pins	4-Pin
Fitment Type	Direct Replacement
Other Details
Note	Always verify fitment using your vehicle's OEM part number.