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BMW oil filter housing class action (B46/B48/B58)

A proposed class action in New Jersey federal court alleges that certain BMW and MINI models with B46, B48 or B58 engines were sold with plastic oil filter housings that crack or warp and leak coolant. Allegations in a complaint are not findings of defect, recall or settlement.

Last checked .

Case identification (from public reporting)

  • Case: Eiger et al. v. Bayerische Motoren Werke Aktiengesellschaft et al., No. 2:26-cv-00753, U.S. District Court for the District of New Jersey.
  • What reporting says about filing: Class-action newswire coverage in early February 2026 describes a lawsuit filed over alleged oil filter housing defects (Top Class Actions dated February 4, 2026; ClassAction.org dated February 2, 2026). We could not reliably parse the primary complaint PDF in this update, so later docket events (amended pleadings, motions) are not stated as current status here.
  • Settlement / class certification: The reporting we read describes a proposed class action. It does not show a certified class, settlement, or claim form.

Court dockets move. Recheck PACER/CourtListener or a BMW dealer for your VIN before relying on this summary. Allegations in a complaint are not findings of defect, recall, or liability.

What the suit says it covers

Reporting on the complaint describes model year 2014–2021 BMW and MINI vehicles equipped with a B46, B48 and/or B58 engine, including examples such as 1/2/3/4/5 Series, X1–X4, and MINI Cooper / Clubman / Countryman variants named in the filing summaries.

Not assumed here: the suit as reported is about those modular B-series engines' plastic oil filter housing. It is not evidence that N55 oil filter housing gasket leaks (a different, older pattern) are part of this case. N55 OFHG prices stay on their own page.

Allegations (not proven)

  • The plastic (polycarbonate) housing can embrittle, warp or crack so coolant leaks externally or mixes toward the oil side.
  • Plaintiffs say repairs have cost roughly $2,000 to more than $3,500 — that figure is an allegation / reporting summary, not our owner-price table.
  • Plaintiffs allege BMW knew of housing issues and that a later design update was incomplete; BMW has not admitted liability in the materials we cite.

For what owners actually paid to replace a B58/B48 housing on this site, use the sourced job page (ranges only when we have at least three independent original reports per shop type).

B58/B48 oil filter housing prices → N55 OFHG prices → Oil leak cost hub →

If your housing already leaked

  • Keep invoices showing the housing, coolant parts and labor.
  • Ask a BMW center whether any service action or goodwill applies to your VIN (this page does not claim one exists).
  • Aluminum aftermarket housings are a common upgrade path discussed by owners; confirm fitment for your engine before ordering.

FAQ

Is there a settlement or claim form?

The February 2026 reporting we read describes a proposed class action. It does not describe a certified class, settlement, or claim form. Recheck the court docket for anything newer.

Does this cover N55 oil filter housing gasket leaks?

No. Reporting on this suit names B46, B48 and B58 engines. N55 OFHG is a separate common leak; see that job page.

Where are real repair prices?

On our B58/B48 oil filter housing page, built from linked public owner posts — not from the lawsuit's alleged dollar figures.

Sources

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