Keep an early warning on engine oil pressure with the Walker Products Engine Oil Pressure Switch 256-1078. This OE-replacement switch drops in for the listed applications, including the 2007-2011 Audi A6 Quattro, the 2007-2010 and 2012-2016 Audi A8 Quattro, the 2007-2010 Audi Q7, plus Audi R8, S5, S6, S8 and Volkswagen Touareg models — see the Buyer's Guide tab for the full year list.
OE-replacement calibration: matches the original pressure activation point, thread pitch, and electrical response.
Built for harsh conditions: made with high-temperature and oil-resistant materials to stand up to heat, oil exposure, and vibration.
Monitors oil pressure: activates the dashboard warning light or feeds a signal to the ECU when pressure falls below safe operating thresholds.
Connection: single male terminal with one female connector; black plastic housing.
Mechanically, this switch senses engine oil pressure and signals the driver or engine control system when it drops, helping give early warning of a low-lubrication condition. It threads into the factory location — typically the engine block or oil filter housing — using the original threads and connector with no modifications. If a faulty original switch is behind a flickering oil light, false warnings, or a missing signal, replacing it with 256-1078 restores that warning function. Manufacturer part number 256-1078 (also 2561078). Country of origin: Italy.
Frequently Asked Questions
What does the Walker 256-1078 oil pressure switch do?
It monitors engine oil pressure and activates the dashboard warning light or sends a signal to the ECU when pressure falls below safe operating thresholds, giving early warning of a low-oil condition.
Which vehicles does it fit?
It's a direct-fit replacement for the listed applications, including Audi A6 Quattro, A8 Quattro, Q7, R8, S5, S6 and S8 models plus the Volkswagen Touareg. Check the Buyer's Guide tab for exact years.
What are signs this switch may need replacing?
Common signs include an oil light that flickers, false warnings, or no signal under an actual low-pressure condition. Have the cause diagnosed first, since these symptoms can have other causes.
Where does the switch install?
It threads into the factory location—typically the engine block or oil filter housing—using the original threads and connector, with no modifications required.
How many are needed and where is it made?
The listed applications use one switch, and this listing is for a single unit. Country of origin: Italy.
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.
