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Old 01-13-2013, 04:41 PM   #1
Andrew325is
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Plug and Play Wiring Harness Adapters for S54, M54, M52TU, & More

*Updated 26 May 2017*

I am making plug and play wiring harness adapters for S54, S62, M54, M52TU, M62TU, M50, S50, M52, and S52 engine swaps. These are to be used with the OEM ECU for your engine and allow seamless integration into your BMW. They are available for all models that have a main C101 or X20 connector.

Features for S54, S62, M54, M52TU, and M62TU adapter harnesses:
-Electronic accelerator pedal connector (excluding M52TU)
-Coolant temperature sensor connector (for instrument cluster gauge)
-Fuel pump relay wiring
-Switch for sport mode (S54 & S62 only) (Upgrade option: Z4 Sport button)
-OBD2 port for diagnostics (excluding 96+ USA models that already have an OBD2 port)
-Oil temperature sensor connector (E30 M3 and Euro E36 M3 only)
-Power for ABS (1990+ E30s)
-E34 M50 oil level sensor connector (M52TU and M54 only, for E30s & E28s with check control)
-Splashproof fuse holders
-Power adapter cable for B+ junction
-Labeled connectors and detailed instructions
-Optional: CAN controller (for A/C, check engine light, and other digital outputs)
-Optional: Secondary air injection pump connector and relay
-Optional for E36: 20-pin diagnostic port for communication with body control modules (ABS, instrument cluster, etc)

Features for M50, S50 (US + Euro), S52, and M52 adapter harnesses:
-Round C101 and X20 main connectors
-For models with check control: Wiring for E34 M50 oil level sensor
-For M52 and S52: Coolant temperature sensor connector (for instrument cluster gauge)
-Wiring for air conditioning input to ECU for proper engine idling with A/C on (instructions included on how to wire it)
-Power for ABS (For 1990+ E30’s)
-Optional: Wiring instructions for EWS II

All of my adapter harnesses are built from all-new components, including new connectors from BMW. As of 21 March 2017 they are made using metric wire that conforms to BMW's ISO 6722 specification that I import from Europe. All of BMW's connectors and pins are specifically designed for metric sized wire, so only metric sized wire will allow the best possible construction.

More information about S54, M54, and M52TU adapter harnesses:
The adapter harness is intended to be used with an E46 engine harness. They can also be used with a Z3 engine harness if one connector is replaced with the E46 version (or two if the trans/O2 sensor Z3 section is also used) (full instructions are included). Let me know if you will be using an E39 harness as there are differences (two of the connectors are combined into one large single connector on the E39).

I wire the S54 adapter harness for the North American fuel pump relay (black EKP-Modul) by default. Please let me know if you want it wired for the standard green relay (Euro spec).

I do not make adapter harnesses for the MSS70 (Z4M) or MS45 ECU. Please make sure your S54 ECU is MSS54 or MSS54HP and your M54 ECU is MS43.

I make adapter harnesses for left hand drive cars as default, so please let me know if your car is right hand drive. I design them for the ECU to be mounted at the glove box, but the ECU can be mounted on the driver's side as well. If you want to mount your ECU on the right side of the car (e.g. glove box on a LHD car) I recommend using a Z3 engine harness since it reaches farther than a E46 engine harness. That is only for the main engine harness. The transmission/oxygen sensor and ignition coil harnesses from an E46 are plenty long.

The S62 and M62TU adapter harnesses are to be used with an E39 engine harness.

A CAN controller can now be pre-wired into the adapter harness. The CAN controller provides A/C compressor control, allows engine to adjust idle with A/C on, and provides programmable digital outputs such as check engine light, an additional aux PWM fan (factory BMW electric fan), engine management light, cruise control, and/or oil level warning light. For additional information see this thread: http://www.r3vlimited.com/board/showthread.php?t=362962

An ECU flash to disable EWS is required for most of these engines to run in older BMWs such as E30 and E36. I offer a free ECU flash to disable EWS for the S54, S62, and M54 with the purchase of an adapter harness (no cost add-on). Supported ECUs are MSS54, MSS54HP, MSS52, and MS43. I can also disable fault codes for the SAP and rear oxygen sensors, and remove top speed limiter. Note that for MS43 the entire ECU is rewritten to a stock E46 configuration so any custom tuning will need to be performed again. An ECU flash is also available for purchase separately. A custom Markert Motor Works tune tailored to your mods is also available.

I also offer an ECU bench flashing harness that allows you to easily flash and tune your ECU yourself. I can make one for MS42, MS43, MSS54, & MSS52 and I can also make one for MS41. Like my other harnesses, it's made from all new components including new connectors from BMW. It includes a fuse for circuit protection and for MS43, MSS54, & MSS52 it also includes a grounding pin for boot mode (for full flash). Just connect it to a 12V power supply of your choice and an appropriate OBD2 USB cable attached to your computer.

ECU flash/tune price list:
$100 for ECU flash with any of the available options listed here
$400 for custom MMW performance tune

Harness price list:
-$575 for S54 or S62 wiring adapter harness
-$550 for M54 or M62TU wiring adapter harness
-$525 for M52TU wiring adapter harness
-$230 for M50, S50, M52, or S52 wiring adapter harness for E30
-$100 for Bench Flashing Harness for MS42, MS43, MSS54, & MSS52 ECUs
-$100 for Bench Flashing Harness for MS41 ECUs

Upgrades and add-ons:
-$0 for MSS54, MSS54HP, MSS52, and MS43 EWS delete
-$65 for factory Z4 Sport button with illuminating LED (for S54 and S62)
-$275 for CAN controller with pre-wired connector on adapter harness (For E36 no additional A/C wiring required for standard configuration. E30 will need some additional wiring for A/C since those wires do not go through the main C101 connector. Extra pins are included for wiring additional outputs.)
-$40 for Secondary air injection pump connector and relay for S54, S62, M54, M52TU, & M62TU (Note that some engine harnesses already include the SAP connector and relay such as the Z3 M54. Check your harness to make sure you need this.)
-$250 for E36 20-pin diagnostic port for S54, S62, M54, M52TU, & M62TU (Integrated with adapter harness if purchased together. If purchased separate, instructions included for DIY wiring.)
-$105 for Fuel pump relay for North American S54 & S62 ECU (black EKP-Modul)
-$15 for Fuel pump relay for M54, M52TU, M62TU, Euro S54, & Euro S62 ECU (standard green relay)
-$35 for E36 dual coolant temp sensor for instrument cluster gauge
-$15 for E30 coolant temp sensor for instrument cluster gauge (NLA from BMW. Various aftermarket brands)
-$35 for E30 M3 and Euro E36 M3 oil temperature sensor

All prices include shipping within the lower 48 states. I can provide you with a shipping quote for delivery to other areas. I ship worldwide.

Contact me at eurotrash8@gmail.com.

Here's a link to my S54 build thread. http://www.r3vlimited.com/board/showthread.php?t=237727

Examples of the adapter harnesses I make:

S62 for E30:



M54 (E39) for E28:



S54 for 96+ E36 with optional CAN controller:



S54 for 96+ E36 with optional CAN controller and 20-pin diagnostic port



S62 for E36 M3 Euro:



S54 for E30 M3:



M54 (E39) for 88+ E30:



S54 for 86-87 325e & 325i/s/c:



S54 for 88+ E30 (older version):



M52TU for E30 (91+ 318i/s/c version) (older version):



S54 for 96-99 E36 (older version):



S54 for 92-95 E36 (older version):


Z4 Sport button:


S50 for 90-91 325is, with E34 M50 oil level sensor connector and "A/C on" input:


S50 for 91 318is, with "A/C on" input:


ECU Bench Flashing Harness:

Last edited by Andrew325is; Yesterday at 12:54 PM.
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Old 01-13-2013, 04:57 PM   #2
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Bump for a good service.
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Old 01-13-2013, 06:52 PM   #3
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Email sent.
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Old 01-14-2013, 09:33 AM   #4
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Awesome service. What's the core charge if I don't have a harness to provide you with?
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Old 01-14-2013, 09:42 AM   #5
Andrew325is
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Quote:
Originally Posted by brian52555 View Post
Awesome service. What's the core charge if I don't have a harness to provide you with?
I actually don't need a harness from you unless you'd like to have one adapted that will not reach your ECU mounting location. I can provide you with a new Z3 harness for $500. Slightly less for an E46 harness (I just found one for $279 although you can probably do better).

Last edited by Andrew325is; 01-14-2013 at 10:08 AM.
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Old 01-14-2013, 09:54 AM   #6
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Email sent bud, looking forward to it
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Old 03-03-2013, 07:00 PM   #7
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Old 03-04-2013, 09:37 AM   #8
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sweet i will in for s54 just need to organize some stuff
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Old 03-12-2013, 12:03 PM   #9
phreshkid
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I am really really keen to the idea of an aluminum block m54 in a 2002.

Hypothetically speaking, it should be easier?
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Old 03-12-2013, 12:28 PM   #10
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^Yeah an all aluminum, shrick cammed, double vanos, m54 sounds like a better idea than a s50 for my vert.
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Old 04-27-2013, 09:06 AM   #11
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Just shipped another one.
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Old 04-27-2013, 09:34 AM   #12
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This is awesome! Thanks! Someday I'll want one of these. Someday...
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Old 06-21-2013, 12:42 PM   #13
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I want one! Might have to order one before you stop making them.

Funny thing is, I don't have an e30 yet Planning and still looking at E30M available and don't want to spend over $18k if I don't have too LOL

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Old 06-25-2013, 08:13 PM   #14
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I just shipped one to Spain.
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Old 08-02-2013, 09:38 AM   #15
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Sent one to Australia.
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