Catalog

VAG/PORSCHE 059109217C TENSIONER ASSY

Product Specifications

Product quality
OEM Equivalent Grade
starstarstar
50 sold
Wholesale price USD $19.95
Wholesale price CNY ¥138
bolt MOQ (Minimal order)
50 pcs
local_shipping Production time
20-45 days
package_2 Shipping Weight: 0.26 kg
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VAG/PORSCHE 059109217C
VAG/PORSCHE 057109217G
Overview & Operating Principle
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The TENSIONER ASSY is a spring-loaded or hydraulic mechanism that maintains correct tension in the timing belt or timing chain throughout the engine's operating life, compensating for belt stretch, thermal expansion, and wear-induced slack. On timing belt systems the tensioner consists of a spring-loaded pivot arm carrying a smooth idler pulley that bears against the back face of the belt — the spring force keeps the belt taut across its full operating temperature and load range. On timing chain systems a hydraulic tensioner uses engine oil pressure acting on a piston to push a tensioner blade or guide rail against the chain, providing automatic slack compensation as the chain elongates with mileage. Correct belt or chain tension is critical to maintaining precise valve timing — a slack timing drive retards camshaft phasing, reducing power and increasing emissions, while an over-tensioned drive accelerates bearing and belt wear.

This unit — VAG/PORSCHE 059109217C — is manufactured to OEM-equivalent specifications: spring preload force, pivot arm geometry, pulley bearing rated load and speed, hydraulic piston travel and bleed-down rate, and mounting bolt pattern are matched to the original part. Supplied as a direct bolt-in replacement for standard fitment. Available wholesale from 19.95 USD, MOQ 50 pcs, production lead time 20-45 days.

Tensioner failure on belt-driven systems is one of the most consequential failures in engine maintenance — a seized tensioner pulley bearing or a tensioner arm that loses spring force allows the timing belt to skip teeth or snap, causing catastrophic valve-to-piston contact on interference engines. The tensioner must always be replaced as part of every timing belt service regardless of its apparent condition, as internal bearing and spring fatigue are not visible on external inspection. Never reuse a tensioner that has been removed from a running engine.

Symptoms & Diagnostics
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High-pitched squealing or chirping from the front of the engine that varies with RPM — the tensioner pulley bearing is worn, allowing the pulley to wobble on its axis and the belt to flutter against the pulley face; the noise typically worsens as the bearing deteriorates.
Rattling or clattering from the timing cover on cold start that reduces or disappears after a few seconds — characteristic of a hydraulic chain tensioner that has lost oil pressure overnight; if the noise persists beyond 5–10 seconds at idle, the tensioner or its oil feed circuit requires immediate inspection.
Timing-related fault codes P0011, P0012, P0021, P0022 (camshaft position timing over-advanced or retarded) — a slack timing chain caused by a worn hydraulic tensioner allows the chain to stretch beyond the tensioner's compensation range, shifting camshaft phasing outside specification.
Visible belt flutter or slack on the non-tensioned run of the timing belt when inspected with the timing cover removed — the tensioner spring has lost preload and is no longer maintaining correct belt tension across the full pulley span.
Rough idle, loss of power, and increased fuel consumption without misfire codes — valve timing retarded by a slack timing drive reduces cylinder filling efficiency and combustion quality across all cylinders simultaneously.
Catastrophic engine failure with bent valves and piston damage — the terminal consequence of a failed tensioner allowing the timing belt to skip teeth or snap on an interference engine; always inspect tensioner condition proactively at the OEM service interval to prevent this outcome.
Logistics & Customs
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International HS Code
8483.50
EAEU Customs Code (TN VED)
8483 50 809 0
Typical Net Weight
0.26 kg
Country of Manufacture
China
Standard MOQ
50 pcs
Production Lead Time
20-45 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
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  1. Set the engine to TDC on cylinder 1 compression stroke before removing any timing drive components. Align all timing marks — crankshaft, camshaft, and injection pump where applicable — and photograph their positions before disturbing the belt or chain. Never rotate the engine with the timing belt removed on an interference engine.
  2. Relieve tension from the old tensioner before removing the timing belt — on spring-loaded pivot tensioners, insert a locking pin through the tensioner arm into the body to hold it in the retracted position. On hydraulic tensioners, compress the piston fully and insert a retaining pin to prevent extension during installation.
  3. Remove the old tensioner and inspect the timing belt or chain for cracking, fraying, glazing, or tooth profile wear. On belt systems, inspect all idler pulleys for bearing play and seal leakage — a failed idler on a freshly tensioned belt will cause belt failure within a short mileage.
  4. Install the new tensioner in the retracted and locked position — do not release the locking pin until the belt is correctly routed over all pulleys and the timing marks are verified aligned. On hydraulic chain tensioners, prime the unit with clean engine oil before installation by depressing the piston several times in a container of oil.
  5. Release the tensioner locking pin to allow the spring or hydraulic pressure to apply tension to the belt or chain. Rotate the engine by hand through two full crankshaft revolutions and recheck all timing marks — confirm they return to their correct positions at TDC. Any timing mark misalignment after rotation indicates incorrect belt routing and must be corrected before starting the engine.
  6. Install the new TENSIONER ASSY (VAG/PORSCHE 059109217C), torque the mounting bolt to OEM specification (typically 20–50 Nm depending on application), refit the timing cover, refill any coolant or oil disturbed during access, start the engine, and listen for correct quiet running before returning the vehicle to service.
Tools: torque wrench, tensioner locking pin set, timing mark alignment tool set for the specific engine, engine barring socket, camera for timing mark documentation, clean engine oil for hydraulic tensioner priming.
Frequently Asked Questions
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Must the tensioner be replaced with every timing belt change, or only when it shows symptoms?
The tensioner must be replaced at every timing belt change without exception, regardless of whether it shows symptoms. Internal bearing fatigue and spring preload loss are not detectable by external inspection — a tensioner that appears functional when cold can fail within a short mileage as operating temperature reduces bearing clearance. The labour cost of a timing belt job is several times the cost of a tensioner; fitting a new belt on an old tensioner and returning for a repeat job when the tensioner fails is not cost-effective. ok.parts supplies tensioners individually and as complete timing kit sets at wholesale MOQ from 19.95 USD per unit.
Is any valve timing calibration or ECU adaptation required after replacing the tensioner?
No ECU coding is required. However, the valve timing must be mechanically verified correct before starting the engine — rotate the engine by hand through two complete crankshaft revolutions after tensioner installation and confirm all timing marks return to their specified positions at TDC. On engines with variable valve timing (VVT/VANOS), clear any camshaft position fault codes stored during the repair and allow the ECU one complete drive cycle to re-establish VVT control parameters after the timing drive is reassembled.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
PartReason for Combined Replacement
Timing Belt / Timing Chain
OEM ref. varies by engine		The tensioner and timing belt or chain are a matched system that must be replaced together at every service interval. Fitting a new tensioner on a worn belt, or a new belt on a worn tensioner, defeats the purpose of the service and risks failure of the older component before the next scheduled interval. Always replace as a complete kit.
Idler Pulley / Guide Pulley
OEM ref. varies by engine		Idler pulleys on the timing belt run at the same speed and temperature as the tensioner pulley and accumulate identical bearing fatigue. A failed idler bearing will destroy a new timing belt within a short mileage. Replace all idler pulleys simultaneously with the tensioner and belt as part of a complete timing kit service.
Water Pump
OEM ref. varies by engine		On engines where the water pump is driven by the timing belt, the pump impeller shaft seal and bearing are subject to the same service life as the belt and tensioner. Replacing the water pump during a timing belt service adds minimal labour cost and eliminates the risk of a pump seal failure requiring complete timing belt disassembly within a short period.