Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSBMW2011335I 4D SEDAN, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEMENGINE ELECTRICAL SYSTEM - REPAIR - E90CONTROL UNIT BOX12 90... REMOVING AND INSTALLING/REPLACING ELECTRONICS BOXREPLACEMENT

2011 BMW 335i 4D Sedan, Standard

12 90... Removing and installing/replacing electronics box: Replacement

2011 BMW 335i 4D Sedan, StandardSECTION Replacement

Modify water drain valve (2) and bump stop (3).

Fig 1: Identifying Water Drain Valve And Bump Stop

G04751305

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Make sure seal (1) is correctly seated on electronics box.

Fig 2: Identifying Seal On Electronics Box

G04740388

Courtesy of BMW OF NORTH AMERICA, INC.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.