DAYCO ATB2521 Timing Belt Tensioner Pulley

Compatible with ALFA ROMEO 155 (167_) , ALFA ROMEO 164 (164_) , LANCIA THEMA SW (834_) Show more info
Ensures proper tension for the timing belt, crucial for engine synchronization and performance.
75.99 EUR
inc. VAT 21%
In stock 13
Delivery 1 day (15.05.2026)
PN ATB2521
Make DAYCO
EAN 8021787032475

This DAYCO timing belt tensioner pulley (part code ATB2521) is designed to maintain the correct tension on your vehicle's timing belt. Proper belt tension is vital for ensuring the camshaft and crankshaft remain synchronized, which is essential for optimal engine operation and preventing potential damage. Crafted with durable materials, this pulley is built to withstand the demanding conditions within the engine bay. Its precise engineering guarantees smooth rotation and reliable performance, contributing to the longevity of your engine's timing system. Replacing worn tensioner pulleys along with the timing belt is a recommended maintenance practice to avoid premature belt failure and costly engine repairs.

  • Maintains optimal timing belt tension
  • Ensures camshaft and crankshaft synchronization
  • Durable construction for long service life
  • Reduces risk of belt slippage or failure
  • Critical component for engine timing system
  • Designed for specific vehicle applications
  • Contributes to smooth engine operation
Drive pulley-Ø [mm]
60,0
Height 1 [mm]
30,0
Height 2 [mm]
47,0
Mass [kg]
+0.5
  • ALFA ROMEO
    • 155 (167_)
      • 2.5 V6 (167.A1C, 167.A1E) (120kW/163PS)
      • 2.5 V6 (167.A1C, 167.A1) (121kW/165PS)
    • 164 (164_)
      • 2.0 V6 Turbo (164.K3) (148kW/201PS)
      • 3.0 V6 (164.H1A, 164.H1B, 164.K1P) (132kW/180PS)
    • GTV (916_)
      • 2.0 V6 Turbo (916.C2A) (148kW/202PS)
    • SPIDER (916_)
      • 3.0 V6 (916S1) (141kW/192PS)
      • 2.0 V6 Turbo (916S2A) (148kW/202PS)
  • LANCIA
    • THEMA SW (834_)
      • 3000 V6 (834GD, 834FD) (126kW/171PS)
    • THEMA (834_)
      • 3000 V6 (834GD, 834FD) (126kW/171PS)
  • FIAT
    • CROMA (154_)
      • 2500 V6 (119kW/162PS)
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