A 2007 Highlander can have either one or two belts depending on the engine: the four‑cylinder version uses a single serpentine belt for accessories, while the V6 version uses two belts (a timing belt and a serpentine belt).
In more detail, Toyota offered two main engines in the 2007 Highlander in many markets: a 2.4-liter four‑cylinder (2AZ-FE) and a 3.3-liter V6. The four‑cylinder typically relies on a timing chain to drive the camshaft(s), with a single serpentine belt for accessories. The V6 commonly uses a timing belt to drive the camshaft(s) in addition to a serpentine belt for accessories, resulting in two belts total. Water pumps on some setups may be driven by the belt path, which affects maintenance considerations and replacement intervals.
Engine options and belt configurations
Below is a quick breakdown of belt configurations by engine type.
- 2.4 L four‑cylinder (2AZ‑FE) models — Accessory drive via a single serpentine belt; camshafts are driven by a timing chain (no timing belt). Total belts: 1.
- 3.3 L V6 (3MZ‑FE/1MZ‑FE) models — Camshafts driven by a timing belt in addition to a serpentine belt for accessories. Total belts: 2. Some configurations may also drive the water pump off the belt path, affecting replacement intervals.
To verify which engine your SUV has, check the engine code stamp on the engine block or consult the owner's manual or VIN; the code will indicate whether the engine uses a belt or chain for the timing system.
Maintenance considerations
Regardless of the belt count, periodic inspection is essential. Timing belts (in engines that use them) are typically replaced around 90,000 miles (about 145,000 km) or as recommended by the manufacturer, while serpentine belts are often replaced around 60,000–100,000 miles depending on wear and conditions. If a belt replacement is performed, many technicians also replace the water pump and tensioners as preventive maintenance when the belt drives critical components.
Summary
The number of belts on a 2007 Highlander depends on the engine: the four‑cylinder version has one belt (serpentine) and no timing belt, while the V6 version has two belts (timing belt plus serpentine). Confirm your specific engine to know the exact belt configuration and maintenance needs, and follow the manufacturer’s recommended service intervals for best reliability.