P3 Gauge - BMW 3 / 4 Series F3X/F8X
P3 V3 OBD2 Multi-Gauge for BMW 3 Series / 4 Series F3X/F8X
SKU: L3P3BF3W
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Custom built multi-function digital boost gauge and more for the F30, F31, F32, F33, F34, F36, F80, and F82 generation (2012-2019) BMW 3 Series and 4 Series, including 316i, 318i, 320i, 328i, 330i, 335i, 340i, M3, 418i, 420i, 428i, 430i, 435i, 440i, and M4 models, as well as all xDrive variants.
In one sleek display you get real-time access to everything that matters - Boost, Engine Temps, Performance Timers, Code Reading/Clearing, and more. All that from the included diagnostics port connection or optional add-on sensors.
It’s easy to install, simple to use, and made to last.
Every unit is built to order, hand-assembled, and developed entirely in-house... not by a huge corporation but by a small team who loves cars as much as you do.
Gauge Modes / Readings
We designed the P3 Gauge to read the most important data from your specific vehicle for easy plug and play install. You'll get everything you need with a single OBD port connection to be up and running in minutes. If you wish to add additional sensors, or not use OBD at all, advanced tuners can use analog inputs or even run in "analog only" mode.
OBD Port Data (CANbus input):
- Boost Pressure
- Coolant Temp
- Engine Oil Temp
- Air/Fuel Ratio (AFR or Lambda)
- Vehicle Speed (Calibrated or Raw)
- Intake Air Temp
- Throttle Angle
- Ignition Timing
- Engine RPM (with shiftlight)
- EGT (Exhaust Gas Temp)
- Battery Volts
- Acceration timers (0-60, 0-100, 60-130)
- Braking timers (60-0, 100-0)
- Read and clear DTC (Trouble Codes)
Optional Analog Inputs:
Optional but powerful. The analog inputs on the P3 Gauge allow you to use up 3 extra sensors to read data. In addition, it also provides a 4th input for auto-dimming display capability.
- Analog Boost Input
Use the P3 Analog Boost Sensor to read up to 80psi boost for advanced tuners and cars with aftermarket forced induction kits. - 2x Universal 0-5v Inputs
Two individual 0-5volt universal analog inputs with flexible configuration allows for near infinite possibilities and customization. - Dimmer Voltage Detection Input
Configure the gauge to d.On.A mode and anything over 1 volt tells the gauge to dim, perfect for easy tapping into existing interior lighting.
All gauges ship within 3-5 business days
We keep standing behind every gauge we make
Reviewed by thousands of drivers worldwide
Love it or return within 30 days - no questions asked
Options & Add-ons
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Adaptors, Tools, and Sensors
Low Profile OBD2 Splitter
Connect multiple OBD2 devices to a single port without cable swaps. Low-profile design fits tight engine bays and under-dash spaces. Supports all OBD2-compliant scanners and code readers for diagnostics, tuning, and data logging. Note: P3 Gauges may require you to enter "ConF" mode or enable LP.y (low priority mode) when using other devices simultaneously to prevent interference.
Ethanol Sensor Voltage Adaptor
The ESVA is a purpose built device that converts digital signals from a GM Continental style ethanol sensor to linear voltages, allowing you to use devices that need 0-5v input.
To use with the P3 Gauge, simply select the "EC" (ethanol content) or "FT" (fuel temp) option for one of the two universal analog inputs.
Not required for Flex-Fuel tuned GM vehicles - The P3 Gauge will read ethanol content directly and automatically over obd2 when activated by your tune.
**Ethanol sensor NOT included**
P3 Analog Boost Sensor (80 psi)
- No wiring required, plugs directly into P3 harness
- 5/32" barbed fitting for boost reference
- Not affected by tunes or modifications
- Does not include tubing or boost tap
Ethanol Content Sensor w/ harness
GM/Continental Ethanol Content Sensor
- Reads ethanol content and fuel temperature
- Includes harness (approx. 8 inches in length)
- 50-150hz square wave output
- Works with the P3 ESVA (Ethanol Sensor Voltage Adapter)
Custom Hardwire Harness
Custom hardwire harness for P3 V3 OBD2 gauges. Features four blunt-end wires that enable direct integration behind your OBD2 port while keeping it accessible, or route to switched 12V power for Analog Mode operation. Simplifies installation and expands gauge functionality without sacrificing port availability.
Boost / Vacuum Tubing Kit
Tubing solution for boost and vacuum line applications. Kit includes approximately 60 inches of 5/32" outer diameter tubing, one T-connector, three rubber hose connectors, and three zipties. Ready to install for manifold, intercooler, and sensor connections on performance and modified engines - some engines may require a boost tap - not included.
0-150 PSI Pressure Sensor (0-5v)
0-150 PSI Pressure Sensor (0-5V) Monitor engine oil, air ride, fuel, or coolant system pressure with this simple analog sensor. Integrates directly with P3 Gauge via universal analog input. Specifications: - 0-150 PSI range - 5 volt operation (do not use 12V power) - 1/8" NPT fitting - 10" wiring harness with 3-wire connection.
- Red - 5 volt power supply (can be sourced from purple wire on P3 harness)
- Black - Chassis ground
- Green - Signal output (routed to brown or blue wire on P3 harness)
To use with the P3 Gauge, simply select the "PS" (pressure sensor) option for one of the two universal analog inputs.
Trim Removal Tool Kit
- Durable plastic composite
- Makes your installation even easier
- Helps reduce the chance of scratching/scuffing trim and interior components
P3 V3 OBD2 Cable (Power + CANbus)
P3 V3 OBD2 Harness
- Super low profile and stealthy, extends only a few millimeters out from the port.
- Allows you to easily tap power/ground/CANbus from the OBD2 port without any wire splicing, or have a spare set of wiring.
**Already included with every P3 Gauge**
VW EA888 Boost Tap
Boost tap kit for Audi/VW EA888 engines. Includes approximately 60" of 5/32" O.D. plastic tubing, zip ties, and connector hoses. This kit does not include a gauge or sensor, sold separately.
BMW N20 / N54 / N55 Boost Tap
Boost tap kit for BMW N20 / N54 / N55 engines. Includes approximately 60" of 5/32" O.D. plastic tubing, zip ties, and connector hoses. This kit does not include a gauge or sensor, sold separately.
BMW B48 / B58 Boost Tap
Boost tap kit for BMW B48 / B58 engines. Includes approximately 60" of 5/32" O.D. plastic tubing, zip ties, and connector hoses. This kit does not include a gauge or sensor, sold separately.
VW FSI/TSI/TFSI Boost Tap
Boost tap kit for Audi/VW TSFI engines. Includes approximately 60" of 5/32" O.D. plastic tubing, zip ties, and connector hoses. This kit does not include a gauge or sensor, sold separately.
The Details...
Supported Vehicles
- BMW 3 Series F3X (2012-2019) • 320 328 330 335 340
- BMW 4 Series F3X (2014-2019) • 428 430 435 440
- BMW M Models F8X (2015-2019) • M3 M4
- BMW 3 Series F8X (2015-2019) • M3 M4
- BMW 4 Series F8X (2015-2019) • M3 M4
Frequently Asked Questions
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Can the P3 Gauge display both English and Metric units?
Yes. You can configure units to English, Metric, or a mix of both, with selections for PSI/inHg, BAR, Celsius, Fahrenheit, MPH and KPH.
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Can the P3 Gauge handle extreme temperatures?
Yes. We have torture-tested our gauges from well below freezing to extreme heat well beyond typical in-car conditions, including scenarios hot enough to soften or melt plastics, and they continued to function without failure.
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Do I need the optional sensors?
In most vehicles, no additional sensors are required for all the supported modes. Certain readings that are not provided by the ECU, aftermarket kits like superchargers, turbochargers or ethanol may require our optional analog sensor/adapter kit, depending on the data you want to monitor.
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Do I need to buy anything extra or is it Plug and Play?
The P3 Gauge comes with everything you need. The optional tools and add-ons we offer are for those looking for extras or to go beyond the standard readings listed in the "Gauge Modes / Readings" section on the produce page.
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How accurate is the P3 Gauge and it's sensor readings?
The P3 Gauge displays real-time true data from your ECU's sensor readings. Many times these readings will be more accurate than your cars dashboard which often shows "dummy" or "soft" values. An optional analog sensor can be added for certain data types to ensure maximum accuracy.
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How does the P3 Gauge get data from my car's existing sensors?
It plugs into the OBD2 port and acts as a diagnostics reader. If you want to keep that port free, a hard-wire harness kit is available.
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How hard is it to install a P3 Gauge and how long does it take?
Most installs take 5–30 minutes, depending on your skill level and vehicle.
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What if I want to use the OBD port for other things?
You can unplug the gauge at any time, it keeps it's settings. We also offer an OBD2 splitter, as well as a hardwire kit. If you want to use another device along with the P3 Gauge, it is best to leave the gauge in ConF mode, as in this mode it will not talk on the vehicle network, or interfere with other devices.
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Will installing a P3 Gauge void my vehicle warranty?
No. Using a P3 Gauge is the same as plugging in an OBD2 scan tool. Under the Magnuson-Moss Warranty Act (15 U.S.C. § 2301 et seq.) and Right-to-Repair principles, you have the right to use your own diagnostic tools through the OBD2 port. A manufacturer cannot void or deny warranty coverage just because an aftermarket tool or gauge was connected.
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Will installing it in the vent affect heating or A/C?
The P3 Gauge is engineered to retain airflow through your vent, so heating and A/C performance are not affected. Each gauge is designed for its specific vehicle to ensure minimal compromise.
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Will modifications or tuning affect my readings?
Standard modifications and ECU reflashes typically do not affect accuracy. Only piggy-back tuning that alters sensor data may require an optional analog sensor.
Your P3 Gauge - Guides and Videos
BMW 3 / 4 Series F3X/F8X
- Setup & Operation PDF Guide
- Vent Install PDF Guide
Configuration & Setup
- Configuration Guide