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BMW · Known Issues

2025 BMW X4 Problems: 1 Known Issue

2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated October 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 BMW X4 has 1 documented issue, with 1 rated critical. The most serious is Plastic Coolant Hoses and Quick-Disconnect Fittings Leak - B46/B48 and B58. DIY maintenance guides at au7o.io.

In This Article

  • X4 Cooling1
  • Recalls13
  • FAQ
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In This Article

  • Cooling1
  • Recalls13
  • FAQ

All 1 Known Issue

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ALL YEARS20252024202320222021202020192018201720162015

On the 2019-2025 BMW X4, the G02 X4's cooling system uses plastic hoses, connectors and quick-disconnect fittings, and X4 reliability guides report slow coolant leaks at plastic parts such as the expansion tank and thermostat housing that can escalate if ignored. Separately, BMW service bulletin SIB 17 03 20 covers coolant leaks from quick-disconnect coolant lines whose O-rings do not seal at or below -15C / 5F, on the G01 X3, G02 X4, G05 X5 and G07 X7 built up to March 31, 2019. This is a platform-wide B46/B48/B58 cooling system, shared with the X3 and 3 Series.

This issue also affects: BMW 2 Series, BMW X2, BMW Z4

Common Symptoms

  • Low coolant warning that keeps returning
  • Sweet coolant smell after driving
  • Crusty residue at hose fittings with no visible drip
  • Temperature gauge climbing
  • Heater blowing cool at idle

How to Fix

Locate the coolant leak using the BMW procedure for the exact engine and cooling circuit. SI B17 03 20 covers listed vehicles built through March 31, 2019 with a confirmed leak when ambient temperature is at or below −15°C (5°F). For that condition, replace all hoses specified in the applicable vehicle/engine attachment if any listed quick disconnect shows coolant loss. Do not extend that grouped replacement rule to every adjacent connector or later X4 solely because it is plastic or aged. Confirm correct parts and coolant by VIN, and do not continue driving with overheating or significant coolant loss.

Research This Issue

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Community Reported
Medium ConfidenceVerifiedReviewed Oct 2026
NHTSA Recalls13 recalls

AIR BAGS

BMW of North America, LLC (BMW) is recalling certain 2025 X4 xDrive 30i, X4 M40i and X4 M vehicles. The inner-left roof frame near the head air bag may have a crack that can damage the head air bag during deployment.

Campaign #24V91000005/12/2024

STEERING

BMW of North America, LLC (BMW) is recalling certain 2024 2 Series Coupe (230i), 330i, X3 sDrive30i, X3 xDrive30i, X3 M40i, and X4 xDrive30i, X4 M40i vehicles. The steering gear may not have been tightened properly, which can allow it to loosen.

Campaign #23V77000016/11/2023

POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

BMW of North America, LLC (BMW) is recalling certain 2023 Toyota GR Supra, 3 Series Sedan (330i xDrive, M340i xDrive, M3), 5 Series Sedan (530i, 530i xDrive, M5), 4 Series Gran Coupe (430i, 430i xDrive), 4 Series Coupe (430i, 430i xDrive, M440i xDrive), 4 Series Convertible (430i, 430i xDrive, M440i xDrive), 8 Series Coupe (840i, M850i xDrive, M8), 8 Series Convertible (840i, M850i xDrive, M8), 8 Series Gran Coupe (850i xDrive, M8), X3 SAV (X3 xDrive30i, X3M), X4 SAV (X4 xDrive30i), X5 SAV (X5 xDrive40i, X5 M50i, X5M), X6 SAV (X6 xDrive40i, X6 M50i, X6M), and Z4 sDrive30i, Z4 M40i vehicles. The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.

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Other BMW Models

BMW i525BMW 3 Series25BMW M323BMW M340i20BMW i419BMW 6 Series19

Frequently Asked Questions

What are the most common BMW X4 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 BMW X4 has 1 documented issue. The documented issue is: Plastic Coolant Hoses and Quick-Disconnect Fittings Leak - B46/B48 and B58. Of these, 1 is rated critical and should be addressed promptly.

Is the BMW X4 reliable?

The 2025 BMW X4 has 1 known issue compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Plastic Coolant Hoses and Quick-Disconnect Fittings Leak - B46/B48 and B58. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

What is the 2019-2025 BMW X4 Plastic Coolant Hoses and Quick-Disconnect Fittings Leak - B46/B48 and B58?

The G02 X4's cooling system uses plastic hoses, connectors and quick-disconnect fittings, and X4 reliability guides report slow coolant leaks at plastic parts such as the expansion tank and thermostat housing that can escalate if ignored. Separately, BMW service bulletin SIB 17 0… Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

Campaign #23V82100006/12/2023

ELECTRICAL SYSTEM:STARTER ASSEMBLY

BMW of North America, LLC (BMW) is recalling certain 2021-2023 Toyota Supra, 2022-2023 2 Series Coupe, 2021-2024 5 Series (xDrive), 2021-2022 Z4, 2022-2024 4 Series (Gran Coupe), 2021-2024 4 Series (Convertible and xDrive Convertible), 2021-2023 4 Series (Coupe), 2021-2024 3 Series, 2021-2023 X4, 2021-2024 X3 vehicles. Please see the recall report for a complete list of all models. The engine starter may overheat and catch fire due to wear on an internal component.

Campaign #26V05600030/01/2026

BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

BMW of North America, LLC (BMW) is recalling certain 2020-2021 X3 sDrive 30i, X3 xDrive 30i, X3M 40i, X3 xDrive 30e, X4 xDrive 30i, X4M 40i, 530i, 540i, 540i xDrive, M550i xDrive, M5, 550e, 550e xDrive, and 550e iPerformance vehicles. A small portion of the rearview image may be slightly obscured. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Campaign #20V59800030/09/2020

+ 8 more recalls. Check all on NHTSA.gov

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