*Cobb AccessPORT ECU Flash Tuner BMW N54 (135i/335i/535i/1M/Z4)

Unleash hidden power within your BMW 135i, 1M, 335i/xi, 535i/xi, or Z4 with the Cobb AccessPORT ECU Flash Tuner. The Cobb AccessPORT ECU Flash simply replaces conservative factory settings with more aggressive calibrations that result in impressive gains in torque and horsepower while still maintaining a high degree of safety for your N54 engine. The tuning is extremely flexible and allows you to choose on the fly one of the performance maps that are loaded onto the AccessPORT. If you are looking to extract the most out of your N54 the AccessPORT even allows for custom mapping. Typical performance gains from the Cobb AccessPORT are increases of 30% peak horsepower and an amazing 38% increase in peak torque. This tune is an ECU flash, not a piggy-back tuner, there will be no added devices to your vehicle's ECU.

Features & Advantages Up horsepower by 30% (approximately 100 horsepower) Increase torque by 38% (approximately 120 Ft./lbs) ECU flash, not a piggy-back tune Installs in minutes using easy to use AcessPORT interface Installs via OBDII connector, no tools required Grows and changes as your modifications do Uninstalls in minutes to return your ECU to stock configuration Conveniently log data values for up to 10 hours without a bulky laptop Integrated performance tools to record 0-60 times, 1/4 ET & trap speed Intuitive DTC code reading to help diagnose issues Easily clear ECU codes 30 day satisfaction guarantee Downloadable free performance maps as released

Important Note - Occasionally an "Unrecognized ROM" will be discovered during the AccessPORT Install process. If an "Unrecognized ROM" is encountered, the user will be prompted to dump the ROM using the onboard Dump ROM tool built into the AccessPORT. Simple step-by-step instructions for dumping an "Unrecognized ROM" can be found here. The ROM is then emailed to COBB Tuning and incorporated into the firmware. COBB Tuning will make every effort to incorporate these new ROMs as quickly as possible. This process can take up to five business days. See the "Supported ROMs" Tab above for a complete list on what ROMs are currently supported.

Applications U.S. & European vehicles 2008-2010 BMW 135i 2007-2010 BMW 335i/xi/xDrive/is 2008-2010 BMW 535i/xi/xDrive 2010-2011 Z4i/Z4is 2011 1M Troubleshooting Read error codes Clear error codes Reset ECU

Below you will find various videos demonstrating how to use your Cobb AccessPORT N54 tuner.

Changing Maps Step-by-step

Performance Monitors Step-by-Step

Live Data Step-by-Step

Data Logging Step-by-Step

Trouble/Error Codes Step-by-Step

Cobb AccessPORT N54 Un-installation

Below you will find the latest in support for the Cobb AccessPORT for the N54.

Click here for the AccessPORT User Manual

AccessPORT Manager
Click the icons below to download the AccessPORT Manager 2.0 software.

AccessPORT Manager 2.0 for Windows and OSX operating systems is the new all-in-one AccessPORT management software that replaces previous versions of AccessPORT Manager and AccessPORT Updater. This new simple and intuitive application is all you need to perform AccessPORT map and datalog file management and keep your AccessPORT firmware up to date!

System Requirements:
Windows: XP 32 (not 64bit), Vista (32 or 64bit) or Windows 7 (32 or 64bit)
OSX: 10.5 or 10.6 (on Intel machines only)

AP Manager 2.0 Tutorial

AP Manager 2.0 User Manual

AP Manager 2.0 Release Notes

What models are currently supported by the AccessPORT?
The AccessPORT is available for N54 2008-2010 BMW 135i, 335i and 535i only.

When will there be support for XXX N54 equipped BMW's?
Here are the development priorities for us right now.
1. Continue to find ROMs for 2008-2011 N54 turbo engined cars and create maps for the 1, 3 and 5 series. This includes the xi and is. We are waiting for a ROM to be provided for the N54 equipped Z4 to see what efforts are required. The X6 is currently lowest on the priority list for N54 vehicle support.
2. Stage2 maps for supported vehicles.
3. Finish development of AccessTUNER Pro and get this into the hands of professional tuners (end of 1Q11).
4. AccessTUNER Race end-user tuning software will be released after AccessTUNER Pro has stabilized.

When will there be support for EU, Gulf Spec, Australian spec N54 equipped BMW's?
Although the ECUs may be similar, there is a significant amount of effort and support required for each global region. There are an equal or greater number of the ROMs for each make/model/year in each region as well as different fuel grades to account for. Then calibrations must be developed for each of these vehicles with the appropriate fuel grade, and further testing must be accomplished before the release of the product. Then support must be provided to improve calibrations based on new developments, customer feedback, etc. This is on a region by region bases. At this time, we are focusing on developing our full-tuning-solution for the breadth of N54 based twin-turbo based vehicles in the USDM region before moving on to other world regions. We do not have an ETA for support outside of the USDM at this time.

When will there be support for N55 based single turbo BMW's?
We do not have an ETA on availability of the AccessPORT for N55 vehicles at this time. Our current priority is to provide our full-tuning-solution for the twin-turbo N54 equipped 1, 3 and 5 series BMW's. While some development has begun on the N55, there is a lot left to do on the N54 before we put significant focus on the N55.

I have a naturally aspirated M3, 128i, 328i, etc. will there be an AccessPORT for my car?
At this time we are concentrating on the 2008-2010 turbocharged 135i, 335i and 535i. We currently have no plans to develop the AccessPORT for NA vehicles.

I already have lots of modifications and downpipes, can I get a map for my car?
We will be releasing more maps for these vehicles in the very near future. We are currently refining our Stage1 offerings and will follow up with Stage2 maps once testing is completed. AccessTUNER Pro software for professional tuning shops is expected to be available by the end of the first quarter of 2011.

Will tuning software become available? Can I get a custom tune?
AccessTUNER Pro is expected to be available to professional tuners by the end of 1Q11. We encourage you to inform your tuner of choice that you are interested in having your AccessPORT equipped BMW pro-tuned.

Does the AccessPORT need to stay connected to the car for my tune to work?
No, the AccessPORT reflashes your ECU with a new calibration that is written to the ECU. Once you flash the map on, you can unplug the AccessPORT and the map will be on the ECU until you uninstall the AccessPORT. Removing the battery or resetting the ECU will not affect the tune. You may plug the AccessPORT in at any time to utilize the additional features provided by the AccessPORT (Live Data, Data Logging, Performance, DTC Scanning).

I already have a reflash on my ECU, is the AccessPORT compatible with this? Will I lose this flash if I install an AccessPORT?
The AccessPORT will more than likely overwrite your reflash, depending on the type of reflash. Some will have to be overwritten while some can be saved using the AccessPORT ROM saving feature. However, you will not be able to interface with a previous flash with the AccessPORT.

Can I use my current piggyback system with the AccessPORT?
We do not recommend this. The AccessPORT is designed to work on its own as a complete tuning solution. Introducing a piggyback system may cause tuning conflicts and other issues. We have not performed any testing on this scenario.

I have upgraded downpipes with high flow cats or not cats at all and I am getting a Check Engine Light for rear O2 sensor codes. Will the AccessPORT be able to turn these codes off?
The ECU uses the rear O2 sensors in daily operation, and these need to remain in the exhaust system for proper engine function. The AccessPORT has the ability to keep the cat inefficiency codes from being thrown on the N54 while maintaining proper operation of the O2 sensors when there are no cats or aftermarket cats. Stage2 calibrations will have these codes turned off when they become available.

I just tried to install my AccessPORT and it is telling me that my vehicle is an "Unsupported ROM Version" and won't let me install, what should I do?
You have encountered an ECU that we have not yet added support for. However, the AccessPORT is able to download your vehicle's ROM which you can email to us and we can then add support. To download your ROM, follow the instructions found here: http://cobbtuning.com/info/?id=5848. Next use AccesPORT Manager to save this file to your computer. Then email the file to rom@cobbtuning.com along with your Name, Email address, Vehicle Year Make and Model and transmission type. Once we have the ROM adding support should only take a few days and we will email you with instructions for adding support to your AccessPORT.