2020 Toyota Tundra Serpentine Belt Replacement Guide
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick Answer
- Belt Length: 2450mm (96.5 inches)
- Rib Count: 8-rib
- OEM Belt Part Number: 90916-A2024
- Aftermarket Cross-References:
- Gates: K080965
- Dayco: 5080965
- Continental: 4080965
- Auto-Tensioner Part Number: 16620-0S011
- Idler Pulley Part Number: 16604-0S010
Belt Routing
Before you remove the old belt, it's always a good idea to take a quick photo of the belt routing for reference. The 2020 Toyota Tundra with the 5.7L V8 engine has the following serpentine belt routing:
- The belt wraps around the crankshaft pulley at the bottom center of the engine.
- From the crank pulley, the belt travels up to the A/C compressor on the passenger side.
- Next, it goes around the idler pulley, located just above the A/C compressor.
- The belt then moves across the engine to the alternator on the driver's side.
- From the alternator, it goes down and around the power steering pump.
- The belt then goes around the water pump pulley.
- Finally, the belt goes under the auto-tensioner before returning to the crankshaft pulley.
How to Replace the Serpentine Belt
To replace the serpentine belt on your 2020 Tundra, you will need a serpentine belt tool or a 14mm socket and a long-handled breaker bar to release the tension on the auto-tensioner. The tensioner has a 14mm hex head that you will turn clockwise to release the tension. This will allow you to slip the old belt off the pulleys and install the new one.
Replacement Interval
Toyota does not specify a strict replacement interval for the serpentine belt on the 2020 Tundra. However, it is recommended to inspect the belt at regular service intervals and replace it if it shows any signs of wear. A general guideline is to replace the serpentine belt every 60,000 to 100,000 miles.
Signs of a Failing Belt or Tensioner
A failing serpentine belt or tensioner can cause a variety of problems, including loss of power steering, overheating, and a dead battery. Here are some signs to look out for:
- Squealing or chirping noises from the engine bay: This is often the first sign of a worn belt.
- Visible cracks, fraying, or glazing on the belt: Inspect the belt for any visible signs of damage.
- A bouncing or vibrating tensioner: A failing tensioner will not be able to maintain the proper tension on the belt.
- A "Check Engine" light: In some cases, a failing belt or tensioner can trigger a "Check Engine" light.
If you are experiencing any of these symptoms, it is important to have your serpentine belt and tensioner inspected by a qualified technician as soon as possible.
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More specs for the 2020 Toyota Tundra
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 Toyota Tundra Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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