Keep an eye on engine lubrication with the Walker Products Engine Oil Pressure Switch 256-1121, an OE-replacement sensor that monitors oil pressure and signals the ECU or driver when levels fall below safe operating thresholds. It threads directly into the factory location—typically the engine block or oil filter housing—and connects to the existing wiring with no modifications, making it a direct-fit replacement for the 2009 Audi A4 Quattro, 2008-2009 Audi A5 Quattro, 2010-2011 Audi A6, 2009-2012 Audi A6 Quattro, 2009-2012 Audi Q5, 2011-2012 Audi Q7, 2010-2013 Audi S4, 2012-2013 Audi S5, and 2011-2014 Volkswagen Touareg. See the Buyer's Guide tab for engine-level detail.
Monitors Oil Pressure Levels: Activates the dashboard warning or ECU input when oil pressure falls below safe operating thresholds.
Exact OE Fit: Installs in the factory location using the original threads and connectors—no modifications required.
Engineered for Harsh Conditions: Built to resist high temperatures, oil exposure, and vibration in demanding engine environments.
OE Replacement Calibration: Matches original specs for pressure activation point, thread pitch, and electrical response.
If a failed switch is behind a flickering oil light, false warnings, or a missing signal under actual low-pressure conditions, this Walker unit restores that early-warning function within the lubrication system.
Frequently Asked Questions
What does this oil pressure switch do?
It monitors engine oil pressure and activates the dashboard warning light or sends an input to the ECU when pressure falls below safe operating thresholds.
Will it fit my vehicle?
It's a direct-fit replacement for applications like the 2009-2012 Audi Q5, 2010-2013 Audi S4, and 2011-2014 Volkswagen Touareg. Check the Buyer's Guide tab for the full list and engine detail.
Where does this switch install?
It threads directly into the factory location—typically the engine block or oil filter housing—and connects to the existing wiring with no modifications required.
What are signs this switch may need replacing?
Common signs include an oil light flickering, false warnings, or a lack of signal under actual low-pressure conditions. Diagnose the cause before replacing.
Is this an OE replacement part?
Yes. It's an OE-replacement switch calibrated to match original specs for pressure activation point, thread pitch, terminal type, and electrical response.
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WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
