Electronics for BMW Z Series G29 (2019+)

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BMW fuel system electronics are crucial for the precise operation of your vehicleaEURtms fuel delivery system, optimizing fuel efficiency, and ensuring engine performance. These sophisticated components control essential functions such as fuel injection, fuel pump operation, and sensor data to manage fuel flow, maintain the correct air-fuel mixture, and improve emission control. BMW vehicles may also be equipped with flex fuel systems that adjust the air-fuel ratio depending on the type of fuel being used, allowing for better adaptability to E85 or other ethanol blends. Additionally, fuel pump control modules play a key role in regulating fuel pressure and ensuring the pump operates at optimal levels. Common issues with fuel system electronics include malfunctioning sensors, failing fuel injectors, and damaged fuel pumps or fuel pump control modules, leading to poor fuel economy, engine misfires, or stalling. Solutions to these problems include replacing faulty sensors, upgrading to high-quality fuel injectors, and ensuring the fuel pump control module is functioning correctly. By investing in premium components and performing regular maintenance, these issues can be minimized, extending the lifespan of the fuel system while ensuring peak performance.

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BMW B46 B48 B58 Ethanol Content Sensor

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T#:29500150

Part#: 100.1037

In Stock

$ 96.99

This product was last offered at the strikethrough price on
04-17-2026

$ 94.99 USD

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BMW B46 B48 B58 Ethanol Content Sensor is a genuine Continental (VDO) Flex Fuel E85 sensor designed to accurately measure the ethanol-to-gasoline ratio in your vehicle's fuel system.

Accurate Measurement: Measures the ethanol content in fuel, providing precise data for optimal engine performance and fuel management.
Flexible Compatibility: Works with a blend of ethanol and gasoline, suitable for vehicles with appropriate fuel lines, injectors, and ECU calibration.
Quick-Connect Installation: Features quick-connect style fuel connections for easy installation in the main fuel feed line.
Integrated Fuel Analysis: All fuel passes through the sensor before reaching the fuel rail, allowing for accurate ethanol percentage readings sent to the vehicle's DME or ECU.
Standard Fittings: Both inlet and outlet connections are 3/8" SAE sized fittings for straightforward integration with existing fuel systems.

This ethanol content sensor is essential for vehicles running flex fuel, ensuring that the engine receives the correct ethanol ratio for peak performance and efficiency.

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BMW B46 B48 Motiv ReFlex Plug-n-Play Ethanol Sensor Harness

For Vehicles With Motiv ReFlex Unit Currently Installed Only

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T#:22723690

Part#: 101-0212

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$ 49.00 USD

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BMW B46 B48 Motiv ReFlex Plug-n-Play Ethanol Sensor Harness simplifies the integration of an ethanol content sensor into your BMW's Re|Flex system. This harness is designed to enhance your vehicle's performance by scaling the sequential port injection based on real-time ethanol content, eliminating the need for manual adjustments. Key benefits include:

Effortless Installation: Plug-n-play design makes it easy to connect an ethanol content sensor without extensive modifications.
Real-Time Adjustments: Allows for automatic scaling of port injection based on real-time ethanol content, optimizing engine performance.
Seamless Integration: For CANbus integrated vehicles, it facilitates integration with the factory DME/ECU (pending feature release by tuning platforms).
No Manual Flashes Required: Removes the need for ground disconnection or map switching on your port injection controller.

Please note that the ethanol sensor is not included with this harness.

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BMW B58 3.0L ReFlex+ Main Injector Harness - Inline-6

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T#:29201081

Part#: 900.1008

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$ 200.00 USD

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BMW B58 3.0L ReFlex+ Main Injector Harness - Inline-6 offers a seamless integration solution for your turbocharged BMW inline-6 engine. Designed to work with the Motive ReFlex Control Unit, this plug-n-play harness ensures a hassle-free installation process for your 6 EV6/USCAR injectors.

Direct Plug-N-Play Installation: Connects directly to the ReFlex+ Control Unit and your EV6/USCAR injectors.
Versatile Connector Options: Includes DTM 3-Pin and 2-Pin connectors for integration with ethanol content sensors and external sensors.
Multiple Sensor Connectors: Features connections for a 0-10 Bar Pressure Sensor and a 0-5v sensor.
Auxiliary Output Wires: Provides 3x unterminated wires for additional low-side triggers from the ReFlex+ Control Unit.
Easy Connection: DTM 8-Pin connector allows for straightforward setup with ReFlex+ Install Harnesses.

Turner Motorsport's harness ensures efficient and reliable performance, streamlining the process of integrating your ReFlex+ Control Unit with your BMW B58 engine.

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ReFlex+ Install Harness - Flying Lead

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T#:29201083

Part#: 900.1016

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$ 95.00 USD

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A flying lead harness is a wiring harness that is unterminated at one end and has an excess length of wire so that installation can be customized by the end user. That makes this section of the ReFlex+ Install Harness truly universal. On one end, this harness has an 8-pin connector to plug into any one of our ReFlex+ Main Injector Harnesses. The other end of each wire is unterminated and will be connected to the appropriate sensor, ground, or power supply based on installation instructions. Each harness has a wire for: Switched +12v Input w/ inline fuse +5v Input Ground Can HI Can Lo Cam Sensor Signal Crank Sensor Signal Map Sensor Signal

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3/8" Quick Disconnect Adapter With 1/8" NPT Port

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T#:29500156

Part#: 200.1105

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$ 24.00 USD

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$ 24.00 USD

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Quick disconnect adapters (QDA) are commonly used to adapt different components into vehicle fuel systems without requiring permanent modification. These adaptersÂ are machined from high-grade aluminum and anodized for corrosion resistance. QDAs incorporate VitonÂ© o-rings which are compatible with most types of fuel, solvents and oils. QDAs maintain a reliable leak-proof seal under normal fuel injection system operating pressures. This particular QDA is sized perfectly to adapt right between the fuel line you were going to connect to your ethanol sensor. 3/8" (9.5mm) female quick disconnect 3/8" (9.5mm) male quick disconnect 1/8" Female pipe thread port * Viton© o-rings Crecent-lock system E-85 compatible Black anodized aluminum

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ReFlex Lite Injector Harness - Inline-6

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T#:29234311

Part#: 900.1013

Ships in 4 Business Days

$ 155.00 USD

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Required when installing a Motiv ReFlex Lite to your inline-6 powered BMW! Includes x6 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!

ReFlex Lite Injector Harness - Inline-4

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T#:29234303

Part#: 900.1012

Ships in 4 Business Days

$ 140.00 USD

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$ 140.00 USD

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Required when installing a Motiv ReFlex Lite to your inline-4 powered BMW! Includes x4 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!

JB4PRO Flex Fuel Add On Harness - B58/S58

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T#:49822568

Part#: JB4PB58FFAOH

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$ 49.00 USD

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Take your B58 or S58 build further with the JB4PRO Flex Fuel Add-On Harness—a simple, plug-and-play way to add an ethanol sensor and optional fuel pressure sensor to your JB4PRO setup. Keep your install clean, your wiring organized, and your tune dialed to match every fuel blend in the tank. Why it matters: Plug & Play: Connects directly to your JB4PRO—no cutting or splicing required. Sensor Ready: Supports ethanol and fuel pressure sensors for precise, real-time fueling adjustments. Clean, Safe Installation: Includes a 12 V adapter and inline fuse for hassle-free integration. How it works: This harness links your JB4PRO tuner to your flex fuel hardware. It’s not a complete flex fuel kit—you still need a compatible ethanol sensor—but it gives your JB4PRO the accurate readings it needs to adjust timing, boost, and fueling for E30, E50, or E85 blends.

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Fuel-It! Flex Fuel Kit - B58 G29 Z4

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T#:21275568

Part#: FFK-G29Z4-CK

Ships on Jun 19, 2026

$ 479.99 USD

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If you are running E85 or ethanol mixes in your BMW, you need this kit! This is a complete plug and play kit to install a Bluetooth ethanol sensor in your B58 powered G29 Z4. This kit replaces the stock fuel lines from the fuel tank to the engine bay with an upgraded -6an E85 compatible fuel line and adds an ethanol sensor and Bluetooth analyzer to monitor your ethanol content. Includes both Bluetooth App & 5v analog output for JB4 or flash tuning. All of these kits utilize the BMS custom billet aluminum fittings to integrate with the stock fittings so no modifications are needed. For the G29 Z4 JB4 platform connect the white wire to position #4 on the JB4 25 pin harness. Select WMI Ethanol Setup option 0 to enable pin location 2/3/4 flex fuel input. *Ethanol Sensors don't actually read the ethanol content, the readings are based on the absence of gasoline, so if your fuel is contaminated your ethanol readings may be artificially elevated.

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Black Market Parts Universal Fuel Pump Wiring Kit

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T#:38195421

Part#: 601-0054

Ships in 5 Business Days

$ 14.99 USD

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$ 14.99 USD

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The Black Market Parts Universal Fuel Pump Wiring Kit is a one-stop shop solution for anyone looking to add an additional fuel pump to their fuel tank. This compact kit provides 6 inches of 100% E85 compliant 12 gauge wiring so you don't have to buy complete spools of wire just to get the little wire you need to extend the pump harness. The kit also includes all hardware for bulk head style pass-through for power used by pump manufacturers around the world. Full stainless bulk head power posts make it easy to add pass-through power to any fuel pump

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