2022 Tesla Model 3 Serpentine Belt Routing & Length

As an ASE-certified master technician, I see plenty of interesting questions come into the bays, but this is one of my favorites. If you are searching for the serpentine belt routing, belt length, and replacement parts for a 2022 Tesla Model 3, there is a very important technical detail you need to know: The 2022 Tesla Model 3 is a fully electric vehicle (EV) and does not have a serpentine belt.

Because the Model 3 lacks an internal combustion engine, it does not utilize a drive belt to power accessories. Instead of a belt spinning an alternator, mechanical water pump, or traditional power steering pump, all of these systems are entirely electric.

However, to satisfy the curiosity of those looking for standard automotive reference data (and to help explain how EVs differ from internal combustion engines), here is the breakdown of why you won't find these parts on your Tesla.

Quick answer

Because the vehicle does not have an engine, none of the standard serpentine belt components exist. If you are at a parts store trying to look up these numbers, the catalog will come up blank.

• Belt length: N/A (Does not exist)
• Rib count (e.g., 6-rib): N/A
• OEM belt PN: N/A
• Aftermarket cross-refs (Gates, Dayco, Continental Elite): N/A
• Auto-tensioner PN: N/A
• Idler pulley PN: N/A

Belt routing

On a traditional gas-powered car, a text-based step-by-step description of the routing path usually follows a loop originating at the engine block: crank pulley → A/C compressor → idler → alternator → power steering → water pump → tensioner. We always tell DIYers and junior techs to photograph the existing belt before removal since we can't render an image perfectly in our heads.

If you open the hood of a 2022 Tesla Model 3, you won't find a crank pulley or a belt. You will find the "frunk" (front trunk). Under the plastic cowls, the vehicle uses a high-voltage electric A/C compressor, electric coolant pumps (rather than a belt-driven water pump), a DC-to-DC converter (instead of an alternator), and an electronic power steering rack. There is no serpentine routing path to follow.

How to replace the serpentine belt

On a standard internal combustion engine, replacing the belt involves using a dedicated serpentine belt tool or a 3/8" breaker bar in the tensioner to relieve the spring pressure, slipping the old belt off, and routing the new one.

For the 2022 Tesla Model 3, you can safely leave your 3/8" breaker bar and serpentine belt tools in your toolbox. There is no belt to remove, no tensioner to pry against, and no engine clearance to fight with.

Replacement interval

The replacement interval for a serpentine belt on a 2022 Tesla Model 3 is, quite literally, never.

That doesn't mean the Model 3 is maintenance-free. Instead of belts and oil changes, your maintenance intervals will focus on:

• Cabin air filter replacement (every 2 years)
• HEPA filter replacement, if equipped (every 3 years)
• Tire rotation, balance, and alignment (every 6,250 miles or if tread depth difference is 2/32 in or greater)
• Brake fluid health checks (every 2 years)
• A/C desiccant bag replacement (every 4-6 years)

Signs of a failing belt or tensioner

In a traditional car, a failing belt or tensioner will present itself with high-pitched squealing on startup, chirping noises from a bad idler pulley bearing, or heavy steering if the belt slips on the power steering pump.

If you hear a squealing, humming, or grinding noise coming from the front of your 2022 Tesla Model 3, do not look for a failing belt or tensioner. Instead, the noise is likely coming from:

• The electric A/C compressor working hard to cool the battery during Supercharging.
• The radiator cooling fans spinning up.
• Worn suspension components, such as upper control arm ball joints (a known wear item on Model 3s that causes a notorious squeak over bumps).
• Debris caught in the brake dust shields.

If your EV is making strange mechanical noises, it is always best to have it inspected by a professional who is certified in high-voltage vehicle systems.

Find a trusted shop on Repairius.