Spark Plug for 2004-2009 Audi S4 & More - Bosch 7406

$5.99

Part number: 7406

EAN: 3165143292679

Condition: New

Weight: 0.10 LBS

Item Package Quantity: 1

$5.99

Current Stock: 595

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Bosch Spark Plug P/N:7406

$5.99

Description

Bosch 7406 spark plug for the 2004-2009 Audi S4 V8 4.2L and other vehicles creates the spark that ignites the fuel in the cylinder. Its yttrium-enhanced nickel-copper center electrode gives up to 50% longer performance life than standard copper plugs.

Bosch Nickel with Copper Core conventional spark plug
Nickel-alloy center and ground electrodes around a high-conductivity copper core
Copper core gives a broader heat range to resist pre-ignition and fouling
Nickel-plated rolled threads that resist corrosion
Angled, ribbed insulator designed to prevent misfire from flash-over
Metal glass fused resistor for interference suppression

Quick facts

Part: Bosch 7406 spark plug
Fits: the 2004-2009 Audi S4 V8 4.2L and other vehicles
Condition: New

Misfires, hard starting or a rough idle can mean the plugs are worn, though an ignition coil or a fuel injector can be behind them too, so trace the cause before you buy plugs.

Fits

It is listed for a wide range of Audi and Volkswagen models, including the 2008 Audi S5 V8 4.2L and the 2000-2006 Audi A6 Quattro V8 4.2L, with eight plugs per engine. To check your exact model and engine, open the "Vehicles it fits" section.

Specifications

Fit and size

Quantity per vehicle: 8
Package quantity: 1
Spark plug type: 4-cycle
Insulator type: non-projected

Build and materials

Center electrode: yttrium-enhanced nickel-copper, with copper core
Threads: nickel-plated, rolled
Resistor: metal glass fused
Condition: New

In the box

One spark plug.

Installation notes

The nickel-plated threads need no anti-seize, which saves installation time.

Manufacturer's description

Product specs

Vehicles it fits

Interchange numbers

Buyer's Q&A

Frequently Asked Questions

Is this the right Audi S4 spark plug for the 2004-2009 V8 4.2L?

Yes. Bosch 7406 is listed for the 2004-2009 Audi S4 V8 4.2L. For another Audi or Volkswagen model, open the "Vehicles it fits" section.

Is the Bosch 7406 an Audi S5 spark plug for the 2008 V8 4.2L?

Yes. Bosch 7406 is listed for the 2008 Audi S5 V8 4.2L.

Do Bosch plugs like this nickel-copper one need anti-seize?

No. The nickel-plated rolled threads on this spark plug do not require anti-seize, and they resist corrosion.

What does the resistor in this spark plug do?

The metal glass fused resistor is built to suppress interference. The angled, ribbed insulator is designed to prevent misfire from flash-over.

How can I tell when a copper-core plug like this is worn?

With the engine off and cool, worn or rounded electrodes and a cracked insulator can mean a plug is due for replacement. Misfires while driving can be another sign.

Manufacturer resources

Published by the manufacturer of this part. Links open in a new tab.