One of the most common BMW cooling system failures we see at A & L German Motorwerks is a leaking or failed oil filter housing assembly. Many modern BMW engines use a plastic oil filter housing that is exposed to constant heat cycles, causing it to become brittle and crack over time.

If left unrepaired, a failing oil filter housing can lead to coolant loss, overheating, engine damage, and costly repairs.

---

Common Symptoms of a Failed BMW Oil Filter Housing

• Coolant warning messages

• Low coolant level warnings

• Visible coolant leaks under the vehicle

• Sweet coolant smell from the engine compartment

• Engine overheating

• White residue around the oil filter housing

• Coolant collecting underneath the intake manifold

• Check engine light related to cooling system faults

---

Common BMW Models Affected

We frequently perform oil filter housing repairs on:

• BMW 330i

• BMW 430i

• BMW 530i

• BMW X3

• BMW X5

• BMW X1

• BMW X2

• BMW X7

• BMW M340i

• BMW 540i

Common Engines Affected

• BMW B46

• BMW B48

• BMW B58

These engines commonly experience cracking of the plastic oil filter housing assembly due to heat and age.

---

Why This Repair Shouldn’t Be Delayed

A small coolant leak can quickly become a major issue. As coolant levels drop, engine temperatures rise, increasing the risk of:

• Engine overheating

• Cylinder head damage

• Cooling system failure

• Water pump damage

• Unexpected roadside breakdowns

Addressing the problem early can prevent significantly more expensive repairs later.

---

Our Diagnostic Process

At A & L German Motorwerks, we don’t simply replace parts based on common failures. Every vehicle undergoes a thorough inspection to verify the source of the leak.

Our inspection may include:

• Cooling system pressure testing

• Visual inspection of the oil filter housing

• Diagnostic scan of all control modules

• Inspection for additional cooling system leaks

• Verification of proper cooling system operation

---

Why Choose A & L German Motorwerks?

• BMW Master Certified Experience

• BMW & MINI Specialists

• OEM and Genuine BMW Parts Available

• Dealer-Level Diagnostic Equipment

• Digital Vehicle Inspections

• Honest Repair Recommendations

• Family-Owned and Operated

If you’ve noticed coolant leaks, low coolant warnings, or signs of overheating, contact A & L German Motorwerks today to schedule a professional BMW cooling system inspection.

---