This AI-generated draft has not been independently verified for your vehicle. Confirm engine, trim, build date, tool fitment and torque specifications against the relevant service information before buying tools or starting work.
On the XA50 RAV4 with the 2.5L A25A-FKS, the water pump is a conventional belt-driven unit on the front of the block. You get at it from the right front wheel arch: wheel off, splash shield down, serpentine belt off, then a ring of small bolts. Nothing is exotic, but the bolts are short, into aluminum, and in awkward places, so you want a wobble extension and a small torque wrench more than you want muscle.
The hybrid is a different job entirely. There is no accessory belt — the A/C compressor is electric and so is the engine coolant pump — so the "water pump" is a bolt-on electric assembly with a connector, and the car also has a second inverter coolant pump in its own loop. The thing people get wrong on both versions is the refill: this cooling system traps air, and a poorly bled fill will overheat or blow no heat, which owners then blame on the new pump. Use a funnel kit or a vacuum filler and give it two full heat cycles before you call it done.
| Item | Type | Product search |
|---|---|---|
| Floor jack 2-ton minimum, with lift pad Raise the right front corner to get the wheel and splash shield off. | Required | search retailer |
| Jack stands 2-ton pair Support the vehicle at the pinch-weld jack points while you work underneath. | Safety | search retailer |
| Lug nut socket 21 mm thin-wall, 1/2 in drive Remove the right front wheel for access to the pump area. | Required | search retailer |
| Breaker bar or 1/2 in ratchet 18-24 in Loosen wheel lug nuts. | Required | search retailer |
| Socket set 8, 10, 12, 14 mm 6-point, 1/4 in and 3/8 in drive Engine undercover, wheel-arch liner, coolant reservoir, belt tensioner and pump bolts. | Required | search retailer |
| Ratchets 1/4 in and 3/8 in drive Most fasteners here are small and in tight spots. | Required | search retailer |
| Extensions and wobble extension 3 in, 6 in, 10 in, 3/8 in drive Reach pump bolts past the belt and frame rail. | Required | search retailer |
| Universal swivel joint 3/8 in drive Angled access to the rearmost water pump bolts on the gas engine. | Recommended | search retailer |
| Phillips screwdriver / clip tool #2 Phillips, plastic clip pry tool Fender liner screws and push-pin clips on the inner arch and undercover. | Required | search retailer |
| Serpentine belt tensioner tool Long-handle belt tool with 14 mm socket / square drive set Relieve the auto-tensioner to slip the belt off on the gas 2.5L (not used on Hybrid). | Required | search retailer |
| Drain pan 6 qt or larger, low profile Catch coolant from the radiator drain cock. | Required | search retailer |
| Hose clamp pliers Ratcheting spring-clamp pliers Move the spring clamps on the pump inlet hose / reservoir hose without fighting them. | Recommended | search retailer |
| Gasket scraper and plastic pick Plastic or brass scraper Clean the pump mating face on the block without gouging aluminum. | Required | search retailer |
| Torque wrench 1/4 in or 3/8 in drive, 5-25 ft-lb range Water pump bolts thread into aluminum and must be torqued evenly. | Required | search retailer |
| Torque wrench 1/2 in drive, 30-150 ft-lb Wheel lug nuts to 76 ft-lb. | Required | search retailer |
| Coolant funnel kit Spill-free funnel with Toyota radiator/reservoir adapters Fill and burp the system; the XA50 traps air easily. | Required | search retailer |
| Cooling system vacuum filler Venturi type, shop-air powered Fastest reliable way to purge air, especially on the hybrid with its long heater/EGR cooler runs. | Recommended | search retailer |
| OBD scan tool with Toyota functions Techstream or capable bidirectional tool Hybrid: command the electric water pump and inverter pump on to bleed air; clear any stored pump codes. | Recommended | search retailer |
| Water pump Gas: A25A-FKS mechanical pump with gasket/O-ring. Hybrid: electric engine coolant pump assembly The replacement unit; buy engine-specific, they are not interchangeable. | Parts | search retailer |
| Serpentine belt OE-spec accessory belt, 2.5L gas only Replace while it is off if it has any age or cracking on it. | Parts | search retailer |
| Toyota Super Long Life Coolant Pink SLLC, pre-diluted, 2-3 gal for a full flush Only refill with pink SLLC; the hybrid inverter loop uses the same coolant in a separate circuit. | Consumables | search retailer |
| Distilled water 1 gal Rinsing and topping if you use concentrate. | Consumables | search retailer |
| Brake/parts cleaner and lint-free rags Aerosol Degrease the sealing surface before fitting the new pump. | Consumables | search retailer |
| Thread locker Medium strength, blue, if factory bolts show pre-applied sealer Some pump bolts pass into coolant passages and come with sealant on the threads. | Consumables | search retailer |
| Safety glasses and nitrile gloves Hot coolant and falling debris from the wheel arch. | Safety | search retailer |
| Wheel chocks Pair Chock the rear wheels before lifting the front. | Safety | search retailer |
| Insulated gloves Class 0 high-voltage lineman's gloves (hybrid) Only if you disconnect the HV service plug on a hybrid; treat orange cabling as live. | Safety | search retailer |
Gas 2.5L A25A-FKS: mechanical belt-driven pump, needs a serpentine belt tensioner tool and the belt routing diagram; pump and pulley bolts are in the 10-14 mm range. Hybrid A25A-FXS: no drive belt at all — the engine coolant pump is electric, retained by 10 mm bolts with an electrical connector, and there is a separate inverter coolant pump and reservoir that must be bled independently, ideally with a scan tool that can command the pumps.
| Wheel lug nuts | 76 ft-lb (103 Nm) |
| Water pump mounting bolts (gas A25A-FKS) | verify in the service manual (small M6/M8 into aluminum — do not exceed ~15 ft-lb without confirming) |
| Water pump pulley bolts (if separate) | verify in the service manual |
| Electric water pump bolts (hybrid) | verify in the service manual |
| Radiator drain cock | Hand tight only — plastic |
| Engine undercover / splash shield bolts | Snug, approx. 7 ft-lb (10 Nm) — verify in the service manual |
No. The A25A-FXS hybrid engine has no accessory drive belt; the engine coolant pump is electric and bolts to the front of the engine with a wiring connector. There is also a second electric pump for the inverter cooling loop.
No. On the gas 2.5L the pump bolts to the front of the engine and comes off once the serpentine belt and the right-side splash shield are out of the way. The timing cover stays in place.
Plan on 2-3 gallons of pre-diluted Toyota pink SLLC if you want a proper fill and a little margin for bleeding. A radiator drain only gives up about 4-5 quarts, so a partial drain and refill is common but leaves old coolant in the block.
21 mm. Use a thin-wall socket so you do not mark the alloy wheels, and torque them back to 76 ft-lb (103 Nm) in a star pattern.