Product Overview

The belt tensioner, OEM number A2822000170, is the V-ribbed accessory drive belt tensioner fitted to the Mercedes-Benz CLA (W117, C118) and the A-Class, GLA (W177, X118), covering coupe, hatchback, and wagon body styles across this shared compact platform. Since one part number spans multiple current and recent-generation Mercedes compact models, it's a steady, high-turnover component for anyone stocking parts for this platform.

Worn units typically show up as a squeaking, chirping, or rattling noise from the engine bay, visible belt slack or misalignment, or the belt slipping under load. GSK Auto manufactures this belt tensioner to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

117504116R, 33100090, WG2025993

(Confirm against your VIN or chassis code before ordering - this part spans several related compact-platform Mercedes models and engine variants, so it's worth double-checking the exact chassis before ordering at volume.)

What Is a Belt Tensioner?

Function: The belt tensioner keeps the accessory drive belt at the correct tension as it runs around the engine's pulley system, ensuring consistent power transfer to the alternator, power steering pump, and AC compressor.

Working Principle: A spring-loaded arm inside the tensioner presses a pulley against the belt, automatically taking up slack as the belt stretches slightly over time, maintaining consistent tension without manual adjustment.

Importance: Correct belt tension is essential for the accessory drive system to work reliably; a worn tensioner allows the belt to slip, vibrate, or run misaligned, which can affect multiple engine accessories at once.

Common Failures & Signs: Spring or bearing wear causing a squeaking or chirping noise from the engine bay. Rattling noise linked to belt vibration from reduced tensioner spring force. Visible belt slack, misalignment, or wear on the belt edges. Belt slipping under load, particularly when the AC or power steering is engaged.

Key Features

OEM-standard fitment - matches factory tensioner spring force and pulley alignment for the A2822000170 application.

Precision manufacturing - tensioner arm and bearing machined to tight tolerance for consistent belt tracking.

Long service life - built to handle sustained daily-driving load.

Excellent fitment - direct bolt-in replacement, no modification required.

Corrosion resistance - construction resists under-hood heat and moisture exposure.

Reliable performance - consistent belt tension matching factory calibration.

Benefits

Importers - one part number covers multiple current-generation Mercedes compact models, simplifying inventory.

Wholesalers - steady demand from a widely used compact platform.

Repair Shops - OEM-spec fitment reduces comeback risk on belt system jobs.

Distributors - private label packaging available for building a branded catalog.

End Customers - quiet, reliable belt operation and reduced accessory wear.

Packaging & Shipping

Standard export packaging, sized for a tensioner assembly. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Frequently Asked Questions

• What does this belt tensioner do?

It keeps the accessory drive belt at correct tension, ensuring reliable power transfer to the alternator, power steering, and AC compressor.

• Which vehicles use OEM A2822000170?

Mercedes-Benz CLA (W117, C118) and A-Class/GLA (W177, X118), across coupe, hatchback, and wagon body styles - confirm exact chassis code and engine before ordering.

• Can GSK Auto supply OEM-standard parts?

Yes, this belt tensioner is manufactured to match OEM specification for fitment and performance.

• What's the MOQ for wholesale orders?

MOQ varies by order type - contact us directly for current wholesale tiers.

• Do you export worldwide?

Yes, we ship to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

• Can you customize packaging?

Yes, OEM-style and private label printing are available.

• How do I know if my belt tensioner needs replacing?

Common signs include squeaking or chirping noise, belt rattling, and visible belt slack or slipping.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This belt tensioner is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing belt tensioners for the Mercedes CLA, A-Class, or GLA? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.