SZKAIDAG Belt Tensioner Assembly with Pulley 38278 for Honda/Acura 2.3L–2.4L — Direct OE Fit

SZKAIDAG 38278 is a complete belt tensioner and pulley assembly engineered to replace OE# 31170RAAA01 and compatible units on select Honda and Acura 2.3L/2.4L engines.

This assembly combines a torsion-style spring tensioner and a single V-ribbed pulley to restore correct drive-belt tension for the alternator, power steering, A/C compressor and other accessory components. Built under strict quality controls by SZKAIDAG’s automotive team, the part is dimensioned to match factory fitment and is offered as a direct replacement for several OEM numbers, helping simplify repairs on Civic, CR-V, Accord, Element and compatible Acura models.

Which vehicles and engine codes will this tensioner work with?

The SZKAIDAG 38278 fits a range of Honda and Acura four-cylinder models using 2.3L or 2.4L engines. It is designed as a direct replacement where the listed OE reference numbers match your original tensioner.

• Honda Civic (2006–2015) 2.4L L4
• Honda CR-V (2002–2014) 2.4L L4
• Honda Accord (2003–2007) 2.4L L4; Element (2003–2011) 2.4L L4
• Acura ILX (2013–2015) 2.4L; RDX (2007–2012) 2.3L; TSX (2004–2006) 2.4L
• Compatible OEM cross-references: 31170RAAA01, 31170PNA023, 31170PNA003, 31170PNA013, 31170PND003, 38278M

How does the SZKAIDAG design help belt performance and longevity?

This assembly uses a torsional round spring to maintain steady belt tension through engine speed changes, reducing slippage and noise. The pulley dimension and bearing spec are matched to OE sizing to minimize misalignment and premature wear.

• Pulley outside diameter: 76.5 mm for correct belt wrap
• Bearing bore inside diameter: 17 mm for OEM-style fit
• Pulley width: 37.5 mm to match V-ribbed belt profiles
• Single-pulley configuration engineered for accessory routing used on listed models

What signs indicate the tensioner should be replaced?

Failure symptoms often appear as unusual engine vibrations, increased drive-belt noise, or accessory drive problems when accelerating. If the water pump circulation, alternator charging, or steering assist become inconsistent, the tensioner and pulley are primary items to inspect.

• Loud squeal or chirp from the belt area during acceleration
• Visible belt mis-tracking, glazing, or fraying
• Engine vibration or accessory malfunction tied to belt load
• Excessive pulley play or rough bearing rotation when checked by hand

Is installation straightforward and will this part replace the original unit directly?

The SZKAIDAG tensioner is supplied to match the original part’s mounting and pulley geometry for a direct swap in compatible vehicles. Replacement typically requires basic hand tools and standard belt routing procedures; no special machining or modifications are needed when OE numbers align.

• Direct-fit replacement for the stated OE references and vehicle list
• Designed for simple installation with common garage tools
• Quiet operation with minimal additional noise under normal use
• Inspect belt condition and alignment during installation for best results

Who is this for: The SZKAIDAG 38278 Belt Tensioner Assembly is aimed at DIY mechanics, independent repair shops and fleet technicians working on mid-2000s to mid-2010s Hondas and Acuras with 2.3L/2.4L engines who need a reliable, OE-referenced tensioner. It’s for anyone replacing a worn or noisy tensioner, correcting belt slippage, or restoring accessory drive function with a cost-effective, quality-controlled aftermarket assembly. If you are uncertain about fitment, provide your vehicle VIN or cross-check the OE number to confirm compatibility before purchase.