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Timing chain tensioner 03H109507

Description

Timing chain tensioner by VAG, catalog number 03H109507. Confirmed catalog fitment: Audi A3 8P1 (2003–2012), Audi A3 Sportback 8PA (2004–2015), Audi Q7 4LB (2006–2016), Audi TT 8J3 (2006–2014), Audi TT 8J9 (2007–2014) and other body variants. For an accurate match, compare the number and identification with the removed part and confirm the vehicle specification by VIN. The fitment list is a reference and does not replace a vehicle-specific compatibility check.

TIMING CHAIN TENSIONER. The timing chain tensioner is a component of the engine timing drive system designed to maintain optimal chain tension under all operating conditions. It compensates for chain stretch, reduces vibration and prevents the chain from skipping teeth on camshaft and crankshaft sprockets. Depending on engine design, the tensioner may be mechanical, hydraulic or a combined type. In hydraulic systems, engine oil pressure acts on a plunger mechanism to stabilize chain position and maintain proper timing alignment. Proper operation ensures accurate valve timing, stable engine performance and reduced mechanical noise. Failure symptoms include metallic rattling or ticking noises from the timing area, especially during cold start, unstable engine operation, camshaft timing fault codes or risk of chain jump. Causes may include plunger wear, loss of hydraulic pressure, clogged oil passages or structural damage. Our catalog includes genuine OEM timing chain tensioners, quality aftermarket replacements and tested used units without cracks or excessive wear. Used parts are inspected for housing integrity, plunger condition and hydraulic chamber sealing. Selection is based on VIN number, engine type, timing system generation and part number. Timely replacement prevents chain misalignment, valve damage and costly engine repairs.

Compatibility

Fits 48 vehicles

Nothing found

About the manufacturer · VAG

VAG is a commonly used abbreviation referring to the Volkswagen Group, one of the largest automotive manufacturers and component producers in the world. The group was founded in Germany and includes many well‑known autom...
VAG is a commonly used abbreviation referring to the Volkswagen Group, one of the largest automotive manufacturers and component producers in the world. The group was founded in Germany and includes many well‑known automotive brands such as Volkswagen, Audi, Škoda, SEAT, Porsche, Bentley, Lamborghini and several others. In the automotive spare parts market the term VAG usually refers to genuine components designed for vehicles produced within the Volkswagen Group. The product range includes engine components, fuel injection system parts, turbochargers, transmission elements, suspension components, braking systems, electronic modules, sensors, cooling system parts and body components. Genuine VAG parts are developed according to unified engineering standards used across the Volkswagen Group and undergo strict quality control and testing for durability, reliability and safety. This ensures precise compatibility with vehicles of the group and stable operation of all vehicle systems. According to feedback from vehicle owners and automotive repair specialists, VAG genuine parts are known for their high manufacturing quality, strong reliability and long service life. Users frequently highlight precise fitment without the need for modifications and full compliance with factory specifications. The most commonly mentioned drawback is the relatively higher cost compared with many aftermarket alternatives, although many drivers consider original VAG parts the best option for maintaining vehicle reliability and factory performance.

Additional information
Timing chain tensioner by VAG, catalog number 03H109507, is listed for vehicle repair or maintenance. The catalog identifies the item as “Timing chain tensioner”. Confirmed catalog fitment: Audi A3 8P1 (2003–2012), Audi A3 Sportback 8PA (2004–2015), Audi Q7 4LB (2006–2016), Audi TT 8J3 (2006–2014), Audi TT 8J9 (2007–2014), Audi TT 8N3 (1998–2006) and other body variants. Fitment is based on the catalog links between the part and vehicle bodies. It helps narrow the search, but final compatibility must be confirmed for the exact vehicle specification. The primary ordering references are part number 03H109507 and manufacturer VAG. Parts can differ within the same vehicle model by production year, engine, transmission, installation side, or position. Before purchase, compare the number and identification with the removed component and verify body, year, and specification by VIN. Also compare appearance, connectors, mountings, dimensions, and included items whenever those details are relevant to this part.

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