Standard Ignition MAS0318 mass air flow sensor for the 2004-2009 Audi S4 V8 4.2L and other vehicles measures the air entering the engine and sends that reading to the ECU. The ECU uses it to balance the air/fuel ratio for clean burns.
A rough idle, hesitation or a check engine light can mean the sensor is worn, but a cracked intake hose or a clogged air filter may be behind those signs too, so find the cause before you replace it.
This sensor is a direct-fit OE replacement for the 2004-2009 Audi S4 V8 4.2L, the 2002-2003 Audi S6 V8 4.2L and the 2001-2003 Audi S8 V8 4.2L, and it is tested to OE specifications for long service life. This listing is one sensor, and the 2004-2009 Audi S4 V8 4.2L takes one.
Fit and size
Build and materials
Interchange: 2-14684
MA1148 · 077133471K · 077133471KX
This part cross-references / interchanges with the following part numbers:
Is the Standard Ignition MAS0318 the right mass air flow sensor for the 2004-2009 Audi S4 V8 4.2L?
Yes. Standard Ignition MAS0318 is a direct-fit replacement for the 2004-2009 Audi S4 V8 4.2L, and this listing is one sensor.
What connector does the MAS0318 mass air flow sensor have?
The Standard Ignition MAS0318 has one oval female connector with 5 male blade terminals. It attaches with a snap/bolt-in method and has 4 bolt holes.
Does this mass air flow sensor come with its housing?
Yes. This sensor is a complete assembly with the housing included.
Can a worn mass air flow sensor cause a rough idle or hesitation?
Yes, it can. A rough idle, hesitation or a check engine light can be signs, and a shop can scan for codes and test the sensor, since that test needs the engine running.
Is the Standard Ignition MAS0318 tested for accuracy?
Yes. Each sensor is computer-tested so the ECU receives accurate airflow readings under hard engine conditions, and it is tested to OE specifications.
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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.
