On the 4th-gen CR-V the alternator lives high on the passenger side of the K24, which makes this one of the easier alternator jobs Honda has built. Pull the intake tube and engine cover, release the automatic tensioner with a 14 mm socket on a long breaker bar, drop the B+ cable and the small regulator plug, and two bolts later the unit lifts out through the top. Removing the right front wheel and the plastic undercover is optional, but it makes the lower bolt and the belt path far easier to see.
2012-2014 cars use the K24Z6 with a 5-speed automatic; 2015-2016 switched to the K24W Earth Dreams engine with a CVT, and the alternator part number and amperage differ, so order by VIN. The one thing people get wrong is the serpentine belt: they either mis-route it or fail to seat it fully in one groove, and it self-destructs on the first drive. Photograph the routing before the belt comes off and finger-check every pulley before you crank it.
| Item | Type | |
|---|---|---|
| Wheel chocks Keeps the car from rolling while you work under the hood and front end. | Safety | shop |
| Safety glasses Debris and belt dust fall from the engine bay while you work overhead. | Safety | shop |
| Socket set, 3/8 in drive 10, 12, 14, 17 mm 6-point sockets Covers battery terminals, air intake bolts, alternator hardware and brackets. | Required | shop |
| Ratchet 3/8 in drive, 72-tooth Main driver for intake and alternator fasteners. | Required | shop |
| Extension set 3/8 in drive, 3 in and 6 in Reaches the lower alternator bolt and intake hardware behind the engine cover. | Required | shop |
| Swivel/wobble extension 3/8 in drive, 6 in Lets you reach the rear alternator mounting bolt at an angle. | Recommended | shop |
| Flat screwdriver Medium flat blade Loosens the intake tube hose clamps and pops the wiring clips. | Required | shop |
| Phillips screwdriver #2 Some intake and resonator clamps use Phillips-head worm clamps. | Recommended | shop |
| Breaker bar 1/2 in drive, 18-24 in Gives the leverage to swing the automatic belt tensioner off the belt. | Required | shop |
| Socket for tensioner 14 mm 6-point, 1/2 in drive Fits the tensioner pulley center bolt on the K24 to release belt tension. | Required | shop |
| Serpentine belt tool kit Long-handle belt tool with metric crowfoot set Alternative to a breaker bar in the tight space between the tensioner and frame rail. | Recommended | shop |
| Combination wrench set 10, 12, 14 mm For the B+ terminal nut and any bolt a socket cannot reach squarely. | Required | shop |
| Torque wrench 3/8 in drive, 5-80 ft-lb Sets the alternator mounting bolts and B+ nut to spec in aluminum threads. | Required | shop |
| Floor jack 2 ton minimum Raise the front for undercover removal and lower-bolt access. | Recommended | shop |
| Jack stands 2 ton pair Support the vehicle; never work under a jack alone. | Safety | shop |
| Lug wrench or impact socket 19 mm Removing the right front wheel gives extra room if you go in from the side. | Recommended | shop |
| Trim/clip removal tool Plastic pry set Pops the plastic fasteners on the splash shield and engine undercover. | Recommended | shop |
| Alternator Honda 2.4L K24, 130 A typical (confirm by VIN and part number) The replacement unit; 2015-2016 Earth Dreams engines use a different part number than 2012-2014. | Parts | shop |
| Serpentine belt OEM-length belt for 2.4L with A/C Cheap insurance while the belt is off; original belts crack by 60-100k miles. | Parts | shop |
| Battery terminal brush Clean the terminals and B+ ring so the new alternator charges properly. | Consumables | shop |
| Multimeter DC volts Verify 13.5-14.7 V charging at idle after the job. | Recommended | shop |
| Nitrile gloves Keeps grease and battery residue off your hands. | Safety | shop |
Socket sizes are effectively the same across the generation: 14 mm tensioner bolt, 12 mm and 14 mm alternator mounting bolts, 10 mm B+ nut. The 2015-2016 K24W Earth Dreams engine uses a different alternator part number and slightly different accessory bracket, so order the alternator and belt by VIN rather than by model name.
| Alternator mounting bolts (M8, 12 mm head) | 16 ft-lb (22 Nm) |
| Alternator mounting bolt (M10, 14 mm head) | 33 ft-lb (44 Nm) |
| B+ output terminal nut | 7 ft-lb (9.8 Nm) |
| Belt tensioner pulley center bolt | verify in the service manual |
| Battery terminal clamp nuts | 4 ft-lb (5.5 Nm) |
| Front wheel lug nuts | 80 ft-lb (108 Nm) |
Sizes here (10 mm battery/B+ nut, 12 mm and 14 mm alternator bolts, 14 mm tensioner bolt, 19 mm lugs) match the K24 in this generation, but confirm which mounting bolt is which on your specific year before you buy a single socket, since the fastener mix changed slightly with the 2015 Earth Dreams engine.
No. On the 2.4L the alternator comes out through the top of the engine bay after you remove the intake tube. Pulling the right front wheel and the plastic undercover just gives you better access to the lower bolt and the belt.
A 14 mm 6-point socket on the tensioner pulley center bolt. Use a 1/2 in drive breaker bar or a dedicated serpentine belt tool; a short 3/8 in ratchet usually will not give you enough leverage in that space.
No. There is no battery or alternator registration on this generation. Just reconnect the battery, and expect to reset the clock, radio presets and possibly relearn the idle by letting it sit at idle for a couple of minutes.
With the engine off, battery voltage should be about 12.5 V; at idle with the new or old alternator working you should see roughly 13.5-14.7 V. If it stays near 12.4 V or lower with the engine running, check the B+ cable nut and fusible link first, then suspect the alternator.