On the XA40 RAV4 there is only one accessory belt and one automatic tensioner, so there is nothing to adjust and no locking bolts to fight. The catch is location: the tensioner sits low on the passenger side of the transverse 2.5L, and the frame rail is right in front of it. Plan on pulling the right front wheel and the inner fender liner rather than trying to do it all from above. With access opened up, the belt swap itself takes ten minutes.
Every US-market XA40 RAV4 came with the 2.5L 2AR-FE (the EV model has no belt at all), so tool sizes do not change across the generation. The mistake people make is releasing the tensioner before writing down the routing, then guessing wrong on the smooth-back idler, which the belt rides on with its flat side. Photograph it first. Second most common mistake: not spinning the tensioner and idler pulleys while the belt is off, then chasing a squeal that was never the belt.
| Item | Type | |
|---|---|---|
| Floor jack 2 ton minimum Lift the right front corner to reach the tensioner from below. | Required | shop |
| Jack stands 2 ton pair Support the vehicle while you work under the wheel well. | Safety | shop |
| Wheel chocks Block the rear wheels before lifting. | Safety | shop |
| Lug nut socket 21 mm, 1/2 in drive, thin wall Remove the right front wheel for access. | Required | shop |
| Breaker bar or 1/2 in ratchet 1/2 in drive, 18-24 in Loosen lug nuts and, with an adapter, swing the belt tensioner. | Required | shop |
| Socket set 10 mm and 12 mm, 3/8 in drive Fender liner, under-tray and engine cover fasteners on the XA40 are mostly 10 mm with a few 12 mm. | Required | shop |
| Trim/clip removal tool Plastic pry set Pops the push-pin clips holding the inner fender liner and splash shield without breaking them. | Recommended | shop |
| Phillips screwdriver #2 Some liner screws are Phillips-head push screws. | Recommended | shop |
| Combination wrench 14 mm, stubby or ratcheting Fits the automatic tensioner pulley bolt to swing the tensioner and release belt tension in tight quarters. | Required | shop |
| Socket 14 mm 6-point, 3/8 in drive Alternative to the wrench on the tensioner bolt when used with extensions. | Required | shop |
| Extension and swivel/wobble adapter 3/8 in drive, 6 in and 12 in Reaches the tensioner bolt past the frame rail at an angle. | Recommended | shop |
| Serpentine belt tool kit 3/8 in drive long-reach bar with sockets Purpose-built leverage for tight belt tensioners; not essential but speeds the job. | Recommended | shop |
| Inspection mirror and flashlight Verify belt routing on the hidden upper pulleys before releasing tension. | Recommended | shop |
| Torque wrench 1/2 in drive, 30-150 ft-lb Torque the lug nuts on reinstall. | Required | shop |
| Serpentine belt 6-rib belt for 2.5L 2AR-FE (match old belt length/rib count) The replacement belt; buy by year/engine and compare to the old one before installing. | Parts | shop |
| Belt tensioner assembly 2AR-FE automatic tensioner Replace if the pulley is noisy, rough, or the arm bounces; common at higher mileage. | Parts | shop |
| Idler pulley 2AR-FE idler Optional; spin it with the belt off and replace if it growls or wobbles. | Parts | shop |
| Shop rag and brake cleaner Wipe oil or coolant residue off pulley grooves so the new belt does not slip. | Consumables | shop |
| Mechanic's gloves Protects hands in the tight space around the frame rail. | Safety | shop |
All gas XA40 RAV4 models use the 2.5L 2AR-FE, so the 14 mm tensioner bolt and 10 mm access fasteners are the same across 2013-2018; the 2012-2014 RAV4 EV has no accessory belt. Non-US 2.0L and 2.2 D-4D versions use a different tensioner layout and are not covered here.
| Front wheel lug nuts | 76 ft-lb (103 Nm) |
| Drive belt tensioner assembly mounting bolts | verify in the service manual |
| Idler pulley bolt | verify in the service manual |
| Fender liner / under-tray bolts | Snug only, about 5-7 ft-lb (7-9 Nm) |
The 14 mm tensioner bolt, 10 mm access fasteners, 21 mm lug nuts and 76 ft-lb lug torque are standard for the 2013-2018 RAV4 2.5L 2AR-FE; confirm the exact tensioner swing direction and any pulley bolt torques against a factory service manual before reusing fasteners.
Put a 14 mm wrench or 14 mm six-point socket on the center bolt of the tensioner pulley and pull in the direction that compresses the spring; the arm only swings one way. Hold it there and slip the belt off the idler or alternator pulley, then let the tensioner return slowly.
Not strictly, but almost everyone does. Removing the right front wheel and the inner fender liner gives straight-on access to the tensioner bolt and crank pulley, which otherwise sit behind the frame rail.
Inspect it around 60,000 miles and plan on replacement by roughly 90,000-100,000 miles or sooner if you see cracks across the ribs, missing chunks, glazing or hear a chirp. Toyota lists inspection rather than a hard replacement interval.
Only if they need it. With the belt off, spin each pulley by hand: smooth and quiet means leave it alone, while grinding, wobble or a tensioner arm that flutters at idle means replace it now while you already have access.