BMW Electrical Sensors, Switches, & Relays for BMW X5 M S63 4.4L

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Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

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BMW B46 B48 Motiv ReFlex Plug-n-Play Ethanol Sensor Harness
For Vehicles With Motiv ReFlex Unit Currently Installed Only
Motiv Motorsports - Corporate Logo
T#:22723690
Part#: 101-0212
In Stock
$ 49.00 USD
Free Shipping on orders $49 and up
$ 49.00 USD
Free Shipping on orders $49 and up

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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Vitesco Technologies - Corporate Logo
T#:39059260
Part#: 13627843531
In Stock
$ 93.99

This product was last offered at the strikethrough price on
06-28-2026

$ 90.99 USD
Free Shipping on orders $49 and up
$ 90.99 USD
Free Shipping on orders $49 and up
This is a replacement Manifold Absolute Pressure sensor Located on the charge air cooler. The MAP controls the amount of fuel that goes through the injectors based on the pressure of air at the intake manifold. If your vehicle is giving you a MAP code, replace it immediately to ensure you get the best gas mileage and performance. It is common for this part to fail slowly and cause poor fuel mileage and hampered performance. When it fails, the vehicle will stutter and stall as it falls into a limp mode. One way to check if your MAP is bad is to unplug the connector before starting your car. If it idles well (compared to a previous poor idle), your MAP sensor likely needs to be replaced. If you let this maintenance part go, your fuel economy will suffer as too much fuel is going into the engine and not being burned. A great way to give your vehicle an efficiency boost.
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Motiv Motorsports - Corporate Logo
T#:29101684
Part#: 900.1001
In Stock
$ 729.00 USD
Free Shipping on orders $49 and up
The motive ReFlex+ Control Unit is an advanced I/O integration module that allows precise control of aftermarket components and sends data to the factory DME (ECU) via CANbus communication, expanding performance tuning capabilities. This control unit allows for precise control of fuel pumps, methanol injection kits, nitrous kits, boost controllers, relay triggers, port injection systems, flex fuel systems, and more. Supporting sequential port injection for up to eight injectors and real-time monitoring of injectors, this unit is a great choice for precise control of fuel delivery to your engine.
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OEM VDO Camshaft Position Sensor - B58/48(6)/38 N20
We Price Match - Give Us A Call or Chat!
VDO - Corporate Logo
T#:373726
Part#: 13627525014
Ships on Nov 6, 2026
$ 53.99 USD
Free Shipping on orders $49 and up

A faulty camshaft position sensor will result in timing issues and rough idle/engine operation or light up the check engine light. Get rid of your check engine light and restore smooth operation with this OEM VDO sensor.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Motiv Motorsports - Corporate Logo
T#:29201083
Part#: 900.1016
In Stock
$ 95.00 USD
Free Shipping on orders $49 and up
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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OMP - Corporate Logo
T#:1614
Part#: EA-462
Back Ordered
$ 65.00 USD
Free Shipping
$ 65.00 USD
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OMP Battery Cut Off Switch / Kill Switch, for use in racecars as an emergency "kill switch", to depower the electrical system in the event of a crash or other emergency. This cut off switch is FIA approved, has 6 poles and alternator protection, as well as a removable key.
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OEM Valeo New Alternator - 230amp
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:383432
Part#: 12317603782
Ships on Oct 15, 2026
$ 730.99 USD
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$ 730.99 USD
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The alternator in your vehicle keeps the battery at full charge when your engine is running. Because all of your electronic systems run off of this small piece, it's important that it is operational. If your lights are dim while driving or your battery dies within minutes of starting your car, it's time for a new alternator.

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies. Valeo is an OEM manufacturer for many BMW alternators - save money by buying the same alternator in a different box!

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Dahler Tuning - Corporate Logo
T#:13727071
Part#: DAHELECS-ATTC
Special Order: No Guaranteed ETA
$ 425.00 USD
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$ 425.00 USD
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This anti-theft throttle controller from Dahler lets you custom-tune your throttle's responsiveness and the security of your vehicle. With 5 preset modes from valet mode to track mode, there are no limits to what you can do. The anti-theft feature completely disables the throttle when activated, so when if in an unfortunate theft situation, even with the car started and in gear, there is no way your car can move, saving your vehicle from falling into someone else's less-than-legal possession. COMFORT MODE (blue) Unfamiliar terrain and too much traffic? This mode lets you take it easy. Your gas pedal reacts less sensitively – especially when starting off. Your stress level will thank you. ECO MODE (green) $5.00 a gallon? There are a few tricks you can use to save fuel and money when driving. This driving program supports you in reducing the average fuel consumption of your BMW if certain rules of economical driving are observed. SPORT MODE (red) This driving program gives your vehicle a much sportier character. Your BMW reacts with a significantly better response and a straighter acceleration. The response time of the engine is significantly improved. TRACK MODE (purple) If you are not yet satisfied with the sports program and you like to push yourself to the limit, then give it a try. For those who go on tracks or run cars with 85 Ethanol this mode might be the right choice.
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Motiv Motorsports - Corporate Logo
T#:29234314
Part#: 900.1014
Ships in 5 Business Days
$ 295.00 USD
Free Shipping on orders $49 and up
Required when installing a Motiv ReFlex Lite to your V8 powered BMW! Includes x8 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!
Motiv Motorsports - Corporate Logo
T#:29234300
Part#: 910.1012
Ships in 5 Business Days
$ 499.00 USD
Free Shipping on orders $49 and up
The ReFlex LITE is a simple yet elegant fueling solution for direct injected vehicles that need to add more fuel by installing a port injection system to keep up with their modifications to the vehicle. Using the same precise form of sequential fuel injection as the ReFlex+, the ReFlex LITE brings a more affordable fuel controller without the additional features of the ReFlex+. Sequential port fuel injection for v-8 engines Firmware and maps are available for multiple vehicles FREE on our website High resolution calibration tables 24x24 cell RPM vs MAP 0-48psi MAP pressure range 250RPM increments up to 8500RPM High resolution datalogging Fault detection status available to monitor in TunerPRO RT Compact in size Universal fitment Simple installation Please Note: The ReFlex LITE does NOT have the ability to analyze and transmit ethanol content to an ECU.
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Vargas Turbo Technologies - Corporate Logo
T#:51672717
Part#: VTT-MAP-HARNESS
Ships on Oct 7, 2026
New Item
$ 59.99 USD
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$ 59.99 USD
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As part of the VTT-FAB fabrication line, this extension harness is designed for builders and tuners who need flexibility.
Hitachi - Corporate Logo
T#:48815454
Part#: 13627525014
Ships in 7 Business Days
$ 40.00 USD
Free Shipping on orders $49 and up
The camshaft position sensor communicates the position of the camshaft to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the cam position sensor.
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Vargas Turbo Technologies - Corporate Logo
T#:52129729
Part#: VTT56BSENSKIT64
Ships on Oct 7, 2026
New Item
$ 209.99 USD
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$ 209.99 USD
Free Shipping
The VTT 6-Bar MAP sensor kit provides the necessary overhead to monitor boost levels with a linear voltage scale that makes software calibration straightforward.

Hitachi - Corporate Logo
T#:48850059
Part#: 13628697982
Ships in 7 Business Days
$ 48.99 USD
$ 48.99 USD
The camshaft position sensor communicates the position of the camshaft to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the cam position sensor.
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