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Model-Specific Engine Tuning & Modification Discussion

JB4PRO Free App

27topics

346posts

JB4PRO APP not connecting to device

Terry @ BMS · 10-09-2026, 06:33 AM

JB4 Mobile

500topics

6,872posts

Fault codes 29E0 and 29E1

Ryan@BMS · 10-02-2026, 03:26 AM

N54

2007-2012 BMW N54 Twin Turbo -- The Engine That Started It all!

Support & Log Review 2,937

12,597topics

173,529posts

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N54 severe overboost – 17psi actual vs 8psi target, low WGDC – solenoids tested

Gizm0 · Today, 06:09 AM

N55

Support & Log Review 971

3,389topics

47,612posts

N55 f10

Ryan@BMS · 10-09-2026, 03:08 AM

B58, B48

230, 240, 330, 340, 440, M40, B46, B48, & B58 Applications

2,419topics

22,541posts

J

2025 M340i xDrive Map 6 throttle closure

Jose Rodriguez · Today, 06:13 AM

///M

S55, S63TU, S58

1,138topics

16,202posts

M3 JB4 AFR logs

Ryan@BMS · Yesterday, 03:20 AM

N20, N26

388topics

3,530posts

N20 EWG JB4 – drivetrain malfunction with patches installed correctly

Ryan@BMS · Today, 03:15 AM

N63, N63TU

550, M550, Etc.

407topics

3,427posts

2021 m850i jb4 map1 log analysis help

Ryan@BMS · 10-01-2026, 03:29 AM

Infiniti Q50 Q60 VR30DDTT

597topics

10,243posts

Correct firmware?

Ryan@BMS · 10-11-2026, 03:21 AM

VW/Audi Group

EA888 Gen 3 found in VW, Audi, Seat, Skoda and Porsche

478topics

6,808posts

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JB4 for Gen3 VAG Group

Hisham Ossy · 10-03-2026, 11:00 PM

Kia & Hyundai Turbo

Stinger, G70, Etc.

1,956topics

17,678posts

M

2022 Stinger GT2 3.3T – JB4 Map 1 AFR / Fuel_OL Questions

mccyjcb · Today, 07:59 AM

Ford F150, Raptor, And EcoBoost

117topics

1,515posts

2019 Ford Ranger 2.3L overboost safety

Ryan@BMS · 09-03-2026, 02:46 AM

Mercedes C250, C300, C43, AMG

205topics

2,421posts

S

M260 CLA35 JB4 version

stirling · 09-30-2026, 02:50 AM

MINI Cooper N18, B48

151topics

1,779posts

2022 Mini Countryman JCW log

Ryan@BMS · 10-11-2026, 03:24 AM

Honda Civic, Accord, and Acura Turbo

105topics

1,403posts

Using VP racing gas MS109 question

Ryan@BMS · 02-05-2026, 06:03 PM

Mazda 2.5 Turbo

50topics

1,966posts

R

2024 CX50 tune

RedDevil50 · Today, 04:48 AM

Porsche

33topics

473posts

1

OBD plugged in triggers alarm – tried everything, still no fix

1gr8tek · 10-06-2026, 05:02 PM

Toyota & Lexus Turbo

51topics

586posts

Jb4+ bcm

Ryan@BMS · 10-11-2026, 03:20 AM

Dodge/Jeep Hurricane

25topics

721posts

C

Custom Map 6 Request – 2025 Ram 1500 HO 3.0L

chya · Yesterday, 09:18 AM

Subaru, Maserati, Alfa, Cadillac, Chevy, McLaren, and others

151topics

4,368posts

Mazda CX-90 planned support (flexfuel etc)

Ryan@BMS · 09-03-2026, 03:11 AM

General

Track days, timeslips, and kill stories

Share all your legal race details here!

135i Drag Times 0335i Drag Times 0335xi Drag Times 0

680topics

6,841posts

W

Cadillac CT5-V V6

Whitecaddy · 01-15-2026, 11:09 AM

DIY Modification

Writeups, discussion, and photos for doing it yourself.

450topics

4,821posts

2.5 stinger JB4 help

Ryan@BMS · 04-10-2026, 06:21 PM

Wheels and Tires

Discuss wheels and tires here.

222topics

1,220posts

A

19" or 20" for my E60

aaronramsdale · 06-26-2022, 05:56 PM

Suspension and Brakes

139topics

797posts

R

Bake caliper guide pin stuck in caliper, looking for help/ideas to remove

rhodesman · 08-29-2022, 06:31 AM

BMW Photo/Video/Media Gallery

157topics

768posts

M

2025 X5 M60i in Black Sapphire.

Mike_L · 07-01-2025, 02:12 PM

Regional Forums

California 181Canada 19Europe 35

596topics

3,006posts

D

Jb4 für vw polo/ 595 abarth

Diabolik2026 · 09-12-2026, 06:00 AM

Market Place - For Sale / Trade / Wanted

Sell, buy, trade and make requests.

4,979topics

22,530posts

R

EU Shipp. JB4 Tuner BMW B58 gen. 2

RubiM440i · 10-10-2026, 11:54 AM

Off-Topic Discussions

Chat with other members on any topic.

296topics

1,287posts

Flex fuel reported ethanol content and calculated fuel trims don't seem to match.

Ryan@BMS · 09-30-2026, 03:46 AM