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Iwis Timing Chain - Upper Center 07D109503A for VW & Audi W12/W8 Engines

Iwis Timing Chain - Upper Center 07D109503A for VW & Audi W12/W8 Engines

IWIS
Availability:
Out of stock
SKU 50046639
Sold out
$64.95 - $64.95
$64.95
$64.95 - $64.95
$64.95
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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This timing chain by Iwis is the upper center chain for W12 and W8 engines found in Audi A8, Volkswagen Phaeton, and Passat W8 models from 2002-2009. It ensures precise camshaft timing to prevent piston-to-valve contact. Made to OE specifications, it replaces OEM part number 07D109503A.

Key Features & Benefits

  • OE Quality: Manufactured by Iwis, a German OE supplier of timing chains.
  • Engine Coverage: Fits 6.0L W12 in Audi A8 and VW Phaeton, and 4.0L W8 in VW Passat.
  • Direct Replacement: Replaces OEM part 07D109503A and Iwis 50046639.
  • Prevents Catastrophic Failure: Timely replacement avoids severe engine damage.

Vehicle Fitment

Make Model Years Engine
Audi A8 Quattro 2005–2009 6.0W12
Volkswagen Phaeton 2004–2006 6.0W12
Volkswagen Passat 2002–2004 4.0W8

Technical Specifications

Part Number 07D109503A
OEM Part Number 07D109503A
Iwis Part Number 50046639
Engine 6.0L W12, 4.0L W8
Position Upper Center

Installation Notes

Professional installation recommended due to the complexity of timing chain replacement on W12/W8 engines.

About IWIS

IWIS is a leading German manufacturer of timing drives and chains, supplying to major automotive OEMs.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 3 applications
D3 A8
Make Model Engine Years
No vehicles listed for this group.
Phaeton
Make Model Engine Years
No vehicles listed for this group.
B5.5 Passat W8
Make Model Engine Years
No vehicles listed for this group.
Fits 3 vehicle applications Check vehicle fitment before ordering View fitment

About these Timing Chain Components

The IWIS 50046639 is part of your engine's timing chain system, which keeps the camshafts turning in step with the crankshaft. The chain runs on guides and is kept tight by a tensioner; when any of these wear, the timing can drift or the chain can jump.

Frequently asked questions

What are the signs of a worn timing chain?

A rattle from the front of the engine, especially on a cold start, a check-engine light with camshaft or crankshaft correlation codes, rough running, or reduced performance.

Should timing chain parts be replaced together?

Yes. The chain, guides, rails and tensioner wear together, so replacing them as a set avoids repeating a labor-intensive job. Replace any single-use bolts and seals disturbed during the work.

What happens if a timing chain fails?

On many engines the valves and pistons share the same space, so a jumped or broken chain can cause severe internal engine damage. That is why early signs like cold-start rattle should be investigated promptly.

Can I replace timing chain components myself?

It requires engine-specific locking tools and precise timing procedures, and errors can damage the engine. It is best done by an experienced technician or a well-equipped enthusiast following the factory procedure.

How do I make sure this timing chain part fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.