Installing the BMS Burger Tuner on Your G87 M2: Cost, Process, and Results

The BMW G87 M2 has quickly become a favorite among driving purists and modification enthusiasts. Its S58 inline-six engine offers immense potential from the factory, but many owners are eager to unlock even more performance. One of the most accessible and popular entry-level tunes is the BMS (Burger Motorsports) Burger Tuner — a plug-and-play device that has earned a strong reputation in the BMW community. This expanded guide covers every aspect of installing a Burger Tuner on your G87 M2, from cost and installation to real-world dyno results and long-term driving impressions.

What Is the BMS Burger Tuner?

The BMS Burger Tuner is a piggyback ECU tuning module that intercepts and modifies sensor signals between the engine’s sensors and the factory ECU (Engine Control Unit). Unlike a full ECU flash tune that overwrites the stock software, the Burger Tuner works alongside the factory programming. This approach preserves the OEM safety margins while allowing for significant power gains through careful signal manipulation — primarily for boost pressure, fuel pressure, and VANOS timing.

For the G87 M2’s S58 engine (which also powers the G80 M3 and G82 M4), the Burger Tuner offers several preset maps that can be selected via a simple toggle or through the BMS app (if using the Bluetooth-enabled version). This flexibility makes it an attractive option for daily drivers who still want the ability to revert to stock settings quickly.

Key Features of the BMS Burger Tuner for G87 M2

  • Plug-and-play installation – no wire splicing or permanent modifications
  • Multiple maps for different octane levels and performance targets (91, 93, and race fuel maps)
  • Bluetooth connectivity on newer units for real-time data logging and map switching via smartphone
  • Reversible – removes without a trace, preserving factory warranty when uninstalled
  • Data logging capability to monitor boost, IATs, fuel trim, and timing corrections

Cost Breakdown for the G87 M2

Pricing for the BMS Burger Tuner varies depending on the version and retailer. As of early 2025, expect the following ranges:

  • Standard BMS JB4 (piggyback tuner): $500 – $650
  • BMS JB4 with Bluetooth kit: $650 – $800
  • Optional BMS data cable: $30 – $50
  • Professional installation: $200 – $400 (most owners DIY)
  • Optional BMS flex-fuel kit (for E85 blends): $250 – $350

Additional costs may include a quality OBD-II scan tool for clearing codes (usually unnecessary with JB4) and, if you plan to run higher boost maps, a cold air intake or upgraded intercooler to manage intake temperatures. Many experienced tuners advise a stage 1 or stage 2 intake and a charge pipe upgrade before pushing map 6 or map 7.

The Installation Process – Step by Step

Installing the BMS Burger Tuner on a G87 M2 is one of the simplest modifications you can perform. BMS has designed the harness to be nearly foolproof, with each connector color-coded and labeled. The entire process typically takes 30 to 60 minutes for a first-timer.

Tools You’ll Need

  • 10mm socket and ratchet
  • Small flathead screwdriver (for releasing connector locks)
  • Torx T25 driver (for ECU cover screws)
  • Trim removal tool (optional, for prying panels)
  • Zip ties (for securing the JB4 module)

Step-by-Step Installation

1. Disconnect the battery. Open the trunk and disconnect the negative terminal. Wait 5 minutes for capacitors to discharge. Safety first – this prevents short circuits and ECU damage.

2. Access the DME (Digital Motor Electronics) – the engine control unit on the S58 is located in the engine bay, passenger side, near the strut tower. Remove the plastic trim cover by unscrewing the Torx screws and gently pulling the cover off.

3. Locate the key sensor connectors. On the G87 M2, the BMS harness connects to the MAP sensor (boost pressure), crank sensor, and sometimes the TMAP sensor. The installation instructions included with the kit show exact connector positions and colors. For the S58 engine, all connectors are easily accessible without removing any major components.

4. Disconnect the factory connectors. Press the locking tab with a flathead screwdriver and pull gently. Connect the BMS harness “female” side to the sensor, then the factory connector to the “male” side of the BMS harness. This is known as a “pass-through” connection. Each harness leg is labeled (ex: “MAP,” “CRANK”). Ensure you match them correctly.

5. Mount the JB4 control box. Find a clean, dry location away from heat sources and moving parts. Many owners attach the module to the strut tower brace or inside the ECU compartment using included Velcro or zip ties. Leave enough slack in the wiring to avoid strain.

6. Connect power and ground. The JB4 requires +12V power and a chassis ground. Usually, it taps into the battery positive terminal or a power distribution block under the hood. Use the included ring terminals and secure them tightly.

7. Reconnect the battery and check for any loose connections. Double-check that each sensor connection clicks into place.

8. Program the tune via the BMS app or steering wheel controls. Newer JB4 units for the G87 support map switching through the cruise control buttons. The default map is Map 0 (bypass/stock). Map 1 is a mild tune for 91 octane, Map 2 for 93, and Map 5 for race fuel or ethanol blends.

9. Prime the system. Turn the ignition to ON (engine off) and wait 10 seconds for the JB4 to initialize. Start the engine and let it idle for 30 seconds. No check engine light or unusual noises? Drive gently for a few miles, then do a full-throttle pull on a safe road to test.

Results: Dyno-Proven Gains

The factory G87 M2 produces 453 horsepower and 406 lb-ft of torque (or 503 ps). With a BMS Burger Tuner on 93 octane pump gas, independent third-party dyno results consistently show:

  • Peak horsepower: 530 – 560 whp (on a Dynojet, corrected)
  • Peak torque: 510 – 550 lb-ft at the wheels
  • Boost increase: 2-4 psi over stock (stock peaks around 20 psi, JB4 hits 22-24 psi)

On race fuel (100+ octane) or E85 blends with the flex-fuel kit, numbers climb to 580-610 whp. The gains are linear; the powerband feels broader, with a stronger pull from 3,500 rpm redline. The throttle response is notably sharper because the JB4 also adjusts the pedal-to-throttle mapping.

Fuel Economy and Daily Drivability

Contrary to some rumors, the Burger Tuner does not murder your fuel economy when driven gently. On Map 0 or Map 1, you can still achieve 26-28 mpg on highways. The tune optimizes the air-fuel ratio during cruising, often maintaining factory lambda values. Only under heavy throttle does the JB4 command richer mixtures for safe combustion.

Pros and Cons of the Piggyback Approach

Advantages

  • Warranty-friendly – complete removal leaves no trace, unlike a flash tune that can be detected through flash counters
  • Multiple maps – easily switch between stock, economy, performance, or valet mode
  • Data logging – invaluable for monitoring engine health and tuning improvements
  • Additive power – you can stack a JB4 with a flash tune (e.g., Ecutek or MHD) for even higher output

Disadvantages

  • Maximum ceiling – a piggyback can’t adjust timing as precisely as a full flash; very high horsepower builds require flash tuning
  • Sensor error codes – occasionally, the JB4 may trigger a check engine light for faulty sensor plausibility; usually clears itself or requires a software update
  • Learning curve – understanding boost targets, trim adjustments, and logging requires a bit of research

Long-Term Reliability Considerations

The S58 engine is robust, with forged internals and closed-deck construction. Running Map 2 on 93 octane pump gas is considered safe for daily driving, even on track days. However, caution is needed with higher maps. The factory intercooler starts to heat soak after back-to-back pulls in hot weather, leading to reduced timing advance. For sustained track use, upgrading to a larger front-mounted intercooler and an oil cooler is strongly recommended.

BMS provides thorough safety features: the JB4 will revert to a lower map or even cut boost if it detects dangerous knock levels, excessive intake temperatures, or fuel pressure drops. This gives owners peace of mind while pushing the car.

Community Feedback: What G87 M2 Owners Say

Across BMW forums and social media groups, the feedback on the BMS Burger Tuner for the G87 M2 is overwhelmingly positive. Many report that the car feels “how it should have come from the factory” after the tune. A common remark is that the power delivery is smooth, without the sudden surge that some budget tunes cause.

One owner on Bimmerpost noted: “The JB4 is idiot-proof. I went from stock to Map 3 (100 octane) in five minutes. The car pulls like a demon – no limp mode, no codes.” Another commenter mentioned that after 15,000 miles with the JB4, they had zero issues and even removed it for a dealer visit without a hitch.

However, a minority of users experienced intermittent check engine lights related to post-cat O2 sensor readings. BMS has released firmware updates addressing these issues; the latest versions are considered stable. Always download the latest firmware from burgertuning.com before installation.

Comparison with Other Tuning Options

BMS JB4 vs. Bootmod3 (BM3) or MHD Flash Tune

Feature BMS JB4 Flash Tune (e.g., BM3)
Peak power (93 pump) ~550 whp ~600-650 whp
Installation time 30-60 minutes 5 minutes (Ethernet flash)
Warranty trace No trace when removed May be detected via flash counter
Map switching On the fly (steering wheel) Requires reflash (usually 2-3 min)
Data logging Built-in via Bluetooth Built-in via app

If you’re on a budget or want to keep your factory warranty intact, the JB4 is the smarter choice. If you plan to build a 700+ whp S58 with turbos, fuel system, and meth injection, a flash tune is ultimately necessary.

External Resources and Further Reading

For more detailed install guides, map recommendations, and community Q&A, check out these resources:

Final Thoughts: Is the BMS Burger Tuner Right for You?

The BMS Burger Tuner is an excellent entry point into tuning the G87 M2. It’s affordable, easy to install, and delivers substantial, reliable gains that transform the car without sacrificing daily usability. Whether you’re a weekend track warrior or simply want a little more excitement on your morning commute, the JB4 offers a balanced blend of performance and peace of mind. For most owners, this is the modification that makes the G87 M2 truly sing.