Loading...

Buick Lacrosse Engine Oil Pressure Sensor Filters

Buick Lacrosse Engine oil pressure sensor filters

Starting at low prices, AutoBuffy stocks multiple engine oil pressure sensor filters from top OE-quality brands. This small mesh or screen filter sits between the oil gallery and the oil pressure sensor, blocking sludge and debris from clogging the sensor port. When it clogs or fails, the sensor reads false pressure data, triggering warning lights and potentially masking real lubrication problems.

Signs your Buick Lacrosse needs a new engine oil pressure sensor filter

  • Oil pressure warning light illuminates at idle or under normal driving conditions despite oil level being correct
  • Oil pressure gauge reads abnormally low or fluctuates erratically while the engine is warm and running steadily
  • Replaced oil pressure sensor recently but warning light returned within a short time — a clogged filter is often the overlooked cause
  • Engine produces a faint ticking or lifter noise at startup that clears quickly, suggesting momentary oil starvation at the sensor port
  • Diagnostic scan shows oil pressure sensor rationality fault codes even after the sensor itself has been confirmed good
  • Visible sludge, metallic particles, or darkened residue found on the sensor tip during a routine sensor swap

Which engine oil pressure sensor filter should you buy for your Buick Lacrosse?

The main decision is whether you need a direct OE-replacement screen filter, an upgraded fine-mesh unit, or a complete sensor-and-filter kit. Material and mesh size matter most — finer mesh catches more debris but can restrict flow if your oil is heavily contaminated, so match the filter to your maintenance history and oil condition.

OE-spec replacement screen filter
Best for
Routine maintenance or first-time replacement on a well-maintained engine
What you get
Factory mesh size and geometry, confirmed fit for the sensor port, straightforward swap
Fine-mesh upgraded filter
Best for
High-mileage engines or vehicles with a history of sludge buildup
What you get
Smaller micron rating catches finer particles, helps protect the sensor longer between changes
Sensor + filter combo kit
Best for
Any job where the sensor itself is also suspect or over 100k miles old
What you get
Both components replaced together, eliminates the risk of a failed sensor masking a clean filter or vice versa
Reusable stainless steel screen
Best for
Performance or fleet applications with frequent oil analysis intervals
What you get
Cleanable and reinstallable, consistent flow restriction, long service life when maintained properly

Replacing the engine oil pressure sensor filter on a Buick Lacrosse

Easy⏱ 30–60 minutesOil pressure sensor socket or deep socket in the correct sizeRatchet and short extensionSmall pick or dental tool to extract the old screenClean lint-free ragsDrain pan for residual oil

Locate the oil pressure sensor on the engine block or head, disconnect the electrical connector, and remove the sensor using the appropriate socket. Use a small pick to extract the old filter screen from the port or sensor base, taking care not to leave fragments behind. Install the new filter, thread the sensor back in to manufacturer-recommended snugness — no extreme force is needed — reconnect the harness, start the engine, and verify the warning light clears.

Frequently asked questions

How much does it cost to replace engine oil pressure sensor filters on a Buick Lacrosse?
Parts start at low prices at AutoBuffy. The filter itself is inexpensive, but total cost depends on whether you replace the sensor at the same time. DIY labor is minimal since access is usually straightforward. Shop labor typically runs under an hour, making this one of the more affordable oil system maintenance items.
Can a clogged oil pressure sensor filter damage my Buick Lacrosse's engine?
A clogged filter causes the sensor to read inaccurate pressure, which can mask a genuine low-pressure condition. If the warning system is compromised and real oil starvation goes undetected, bearing and camshaft wear can follow. Replacing the filter restores accurate pressure monitoring and protects the engine's diagnostic feedback loop.
How often should the engine oil pressure sensor filter be replaced on a Buick Lacrosse?
There is no fixed interval, but many technicians recommend inspecting or replacing it whenever the oil pressure sensor is serviced or during a major oil system repair. Engines with a history of infrequent oil changes or sludge accumulation benefit from replacement at every sensor service regardless of apparent filter condition.
Will a bad oil pressure sensor filter cause my Buick Lacrosse to fail an emissions or inspection test?
Indirectly, yes. If a clogged filter triggers a persistent oil pressure fault code, that stored code can cause an OBD-II readiness monitor to report incomplete, which will fail an emissions inspection in most states. Replacing the filter and clearing confirmed codes typically allows monitors to reset within a normal drive cycle.
Is the engine oil pressure sensor filter the same part as the oil pressure sensor on a Buick Lacrosse?
No — they are separate components. The sensor converts oil pressure into an electrical signal sent to the ECU. The filter is a small mesh screen seated in or near the sensor port that prevents debris from reaching the sensor tip. Some sensors ship with an integrated filter, but in most applications they are serviced independently.
Can I clean and reuse the oil pressure sensor filter on my Buick Lacrosse?
It depends on the material. OE paper or soft-mesh screens should be replaced, not cleaned — they deform and lose filtration efficiency. Stainless steel reusable screens can be flushed with solvent and reinstalled if undamaged and visually clean. When in doubt, the low cost of a new filter makes replacement the more reliable choice.

More parts for your Buick Lacrosse

Parking Aid SensorFuel Injection Fuel RailHVAC Automatic Temperature Control (ATC) RelaySpark PlugFuel InjectorHVAC RelayEngine Timing Crankshaft SprocketEngine Variable Valve Timing (VVT) Solenoid

Engine oil pressure sensor filters for other Buick models

Buick RainierBuick Allure