April 2026 BMW 430i Recall, Complaint & Service Bulletin Roundup

April 2026 brought a significant focus on service bulletins for the BMW 430i across various model years, with no new recalls, owner complaints, or federal investigations reported. The standout issue this month is a critical engine main bearing shell defect affecting certain 2025 BMW 430i vehicles, which could lead to severe engine damage. Other notable bulletins address brake fluid leaks and an extended warranty for the PCV system.

Recalls

No new recalls were filed for the BMW 430i in April 2026.

Owner Complaints

No new owner complaints were reported for the BMW 430i in April 2026.

Investigations

No new investigations were opened, upgraded, or closed for the BMW 430i in April 2026.

Service Bulletins

Several important service bulletins were released for the BMW 430i this month, addressing a range of issues from critical engine defects to component warranties.

Engine Main Bearing Shell Defect

BMW has issued a service action for 2025 BMW 430i and M3 vehicles due to a manufacturing defect. This defect can cause the main bearing shells to peel, potentially leading to significant engine damage. This is a severe issue for the affected 2025 BMW 430i engine main bearing defect. Owners of these vehicles should contact an authorized BMW center for a free replacement of the main bearing shells. The NHTSA ID for this communication is InVeh-InApp-Comm.

Brake Fluid Leak

BMW Service Information Bulletin SIB 34 09 25 (NHTSA ID: B340925) addresses an internal leakage in the brake fluid expansion tank for 2024-2026 BMW 3 Series and 4 Series vehicles, including the 430i. This issue can cause the fluid level sensor to malfunction, potentially impacting brake system warnings. The recommended repair involves replacing the brake fluid expansion tank to resolve the leak.

PCV Extended Warranty

An extended limited warranty has been announced for the engine crankcase pressure control valve (PCV) on certain 2021 BMW models, including the 430i. This extension, detailed in bulletin B011423, covers defects in materials or workmanship for 15 years or 150,000 miles, whichever comes first, from the vehicle's original in-service date. This provides long-term coverage for a component crucial to engine function.

What BMW 430i Owners Should Do

• Check for Engine Main Bearing Defect: If you own a 2025 BMW 430i, contact your authorized BMW dealer immediately to inquire about the engine main bearing shell defect and schedule a free inspection and replacement if necessary.
• Monitor Brake Fluid Levels: For 2024-2026 BMW 430i owners, be vigilant for any brake fluid warnings or unusual brake behavior. If you suspect an issue, refer to SIB 34 09 25 and contact your dealer for inspection and potential replacement of the brake fluid expansion tank.
• Verify PCV Warranty Coverage: Owners of 2021 BMW 430i vehicles should be aware of the extended warranty for the PCV system. If you experience engine issues related to the PCV valve, your repair may be covered under this extended warranty (NHTSA ID: B011423).
• Contact Your Dealer: For any concerns related to these bulletins, or if you notice any unusual symptoms, contact an authorized BMW service center. Provide them with your vehicle's VIN so they can check for applicable service actions.