BMW N54/N55 3.5 Bar MAP/TMAP Sensor Adapter Loom Pigtail - BMS Burger Motorsports JB4 Plug & Play Harness for 135i 335i (E82 E88 E90 E91 E92 E93) - Boost Pressure Manifold Sensor Conversion Lead / MAP Upgrade - 36psi Support

Unlock reliable high-boost control on your N54 or N55 with this Burger Motorsports 3.5 bar MAP conversion lead. Designed for owners running uprated turbos or planning more power, this neat plug-in wiring solution allows you to use the BMW 3.5 bar manifold pressure sensor for accurate boost scaling and smooth JB4 tuning right up to 36 psi. We run this on customer cars and the results have been consistently excellent, with clean logs, stable boost and OEM-grade fit and finish.

Why enthusiasts choose this 3.5 bar MAP conversion

• Proven Burger Motorsports quality with OE-style connectors and a tidy, factory-look install
• Expands JB4 boost range to 36 psi for hybrid turbos, single turbo conversions and strong Stage 2+ or Stage 3 builds
• Improves boost resolution for safer, more consistent tuning on road, track and dyno
• Fast to fit, fully reversible and designed for harsh engine bay conditions
• Used by MJ Modifications on N54 and N55 customer cars with great feedback

What this lead does

• Adapts the intake manifold pressure signal to work with the BMW 3.5 bar MAP sensor on N54 and N55 platforms
• Provides a simple plug-in loom between the factory harness and the sensor for clean installation
• Supports higher boost targets while maintaining accurate manifold pressure readings

Important notes

• You will also need the genuine BMW 3.5 bar manifold pressure sensor. This harness does not include the sensor.
• N55 owners: vehicles with the Type A plug require this adapter to run the 3.5 bar sensor. If your car has the later Type B plug, this lead is not required.
• After installation, set the JB4 3.5 bar MAP option to 1 in user adjustments.

How to identify your N55 connector

Check your existing manifold pressure sensor connector. If you are unsure whether you have Type A or Type B, contact us and we will help you confirm before ordering.

Compatibility

For BMW N54 and N55 engines including 135i and 335i. Common fitments include E82 and E88 135i, plus E90, E91, E92 and E93 335i. If you have an N55, please verify your connector type.

Installation and setup

• Plug the conversion lead between the car’s loom and the 3.5 bar MAP sensor
• Requires the OEM BMW 3.5 bar pressure sensor
• Update JB4 settings to enable 3.5 bar scaling

Professional fitting available: MJ Modifications offer in-house installation in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

To ensure the correct part for your vehicle, we can run a quick fitment check. Provide your UK registration number or the last 7 digits of your VIN at checkout.

Part number

E-N54-JB4UG-TMAP-35

Brand

Burger Motorsports

Warranty

Manufacturer does not provide a warranty on this item.

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