On the XA50 RAV4 the 2.5L A25A-FKS starter is not the quick job it was on older Toyotas. It sits on the rear face of the block against the firewall, underneath the plastic intake manifold, so the real work is getting the airbox and manifold off cleanly — the starter itself is two 14 mm bolts and a 12 mm cable nut once you can see it. Budget for a new intake manifold gasket before you start; Toyota treats it as a one-time-use part.
The thing people get wrong is buying a starter at all. A large share of no-crank XA50s are a weak 12 V battery, a corroded or loose negative cable, or a brake/shifter interlock fault, and the hybrid versions do not even have a starter motor — the engine is spun by MG1 in the transaxle. Test battery voltage under crank and confirm power at terminal B and a signal at the solenoid before you pull half the top of the engine apart.
| Item | Type | |
|---|---|---|
| Socket wrench set 3/8 in drive ratchet, ideally flex-head Main driver for every fastener on this job in the tight space behind the engine. | Required | shop |
| Socket 10 mm, 3/8 in drive Battery negative terminal clamp and several harness bracket bolts. | Required | shop |
| Socket 12 mm, 3/8 in drive (6-point) Intake manifold bolts/nuts, manifold support brackets and the starter terminal B nut. | Required | shop |
| Socket 14 mm 6-point, 3/8 in drive The two M10 starter-to-block mounting bolts. | Required | shop |
| Extension set 3 in, 6 in and 10 in, 3/8 in drive Reaching the starter bolts down behind the engine from above. | Required | shop |
| Wobble/swivel adapter or universal joint 3/8 in drive The lower starter bolt is not straight-on accessible; a wobble extension makes it reachable. | Required | shop |
| Torque wrench 3/8 in drive, 5-80 ft-lb Starter bolts thread into aluminum and manifold bolts seal a gasket — both must be torqued. | Required | shop |
| Small flat screwdriver and trim pick set Releasing harness clips, connector locks and the plastic engine cover clips. | Required | shop |
| Hose clamp pliers Spring-band clamp pliers PCV, brake booster and coolant/heater hoses at the manifold use spring clamps. | Recommended | shop |
| Needle-nose pliers Reaching hose clamps and harness clips behind the manifold. | Recommended | shop |
| 1/4 in drive ratchet and short sockets 8, 10, 12 mm Small bracket and clamp bolts where a 3/8 ratchet will not fit. | Recommended | shop |
| Fuel line disconnect tool Toyota quick-connect, 5/16 in / 8 mm Only needed if you must separate the low-pressure feed line at the port-injection fuel rail. | Recommended | shop |
| Inspection light or headlamp LED The starter sits in a dark pocket between the engine and firewall. | Recommended | shop |
| Magnetic pickup tool Flexible, telescoping Retrieves a dropped starter bolt from the bellhousing area instead of pulling the car apart. | Recommended | shop |
| Digital multimeter Confirm battery voltage and that power reaches terminal B and the solenoid before condemning the starter. | Recommended | shop |
| OBD-II scan tool Basic code reader Clear any codes set by disconnecting the battery and injector connectors; Toyota needs no battery registration. | Recommended | shop |
| Floor jack and jack stands 2 ton minimum Useful if you drop the undertray or want access from below to guide the starter out. | Safety | shop |
| Safety glasses and nitrile gloves Fuel residue and debris fall from the manifold area while working overhead. | Safety | shop |
| Starter motor Toyota 28100-25010 / equivalent for A25A-FKS (gas only) The replacement unit; confirm the part number against your VIN. | Parts | shop |
| Intake manifold gasket set Manifold-to-head gasket plus throttle body gasket Toyota calls the manifold gasket a replace-on-removal item. | Parts | shop |
| Brake parts cleaner or throttle body cleaner Aerosol Clean the manifold mating face and the starter mounting pad before reassembly. | Consumables | shop |
| Dielectric grease Small tube Protects the terminal B stud and solenoid connector from corrosion. | Consumables | shop |
| Shop rags and zip ties Catch fuel drips and re-secure any harness clip that breaks. | Consumables | shop |
Only the gas 2.5L A25A-FKS (MXAA52/54) has a conventional starter; the 2.5L hybrid (AXAH52/54) and Prime use MG1 in the transaxle and have no starter motor to service. Fastener sizes are the same across FWD and AWD gas trims — 14 mm mounting bolts, 12 mm terminal B nut, 12 mm intake manifold fasteners.
| Starter to cylinder block bolts (M10) | verify in the service manual (typical Toyota spec is around 27 ft-lb / 37 Nm) |
| Starter terminal B cable nut | verify in the service manual (roughly 9 ft-lb / 13 Nm — do not overtighten the stud) |
| Intake manifold bolts and nuts | verify in the service manual |
| Throttle body bolts | verify in the service manual |
| Battery negative terminal clamp | about 4 ft-lb (5.4 Nm) |
The 14 mm starter bolts, 12 mm terminal/manifold fasteners and 10 mm battery terminal are standard across the A25A-FKS RAV4, and the buried-under-the-manifold location is confirmed for this engine family; torque values for the starter and manifold should be verified against the Toyota service information for your exact model year before final tightening.
No. The 2019-2024 RAV4 Hybrid and Prime crank the engine with the MG1 motor-generator inside the transaxle, so there is no starter to replace. A hybrid that will not start is usually a weak 12 V auxiliary battery, a hybrid battery/inverter fault, or a system code — scan it before replacing anything.
On the 2.5L A25A-FKS, yes for practical purposes. The starter is on the rear of the block under the manifold, and while some people claim partial access from below, you cannot get the cable nut off and the bolts properly torqued without removing the air cleaner and intake manifold.
10 mm for the battery terminal, 12 mm for the intake manifold fasteners and the starter terminal B nut, and 14 mm 6-point for the two starter mounting bolts. Long extensions and a wobble adapter on a 3/8 in drive make the difference.
A dead or weak battery usually gives slow cranking, dim lights, and multiple warning lights during the attempt. A failed starter typically gives full electrical power with a single click or nothing at all from the starter, and you can confirm it by verifying 12 V at terminal B and a signal voltage at the solenoid wire while a helper holds the start button.