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Starting at $50.95, AutoBuffy stocks 9 engine camshaft synchronizers from Standard Ignition, SKP, and Dorman for the Ford Explorer. The camshaft synchronizer signals the PCM on camshaft position so it can time fuel injection and ignition precisely. When it fails, the engine loses that timing reference, causing rough running, misfires, and in some cases a no-start condition.
The most important buying decision is whether to choose an OE-equivalent unit with the sensor already installed or a bare housing you mate to your existing sensor. Beyond that, pay attention to whether the synchronizer is pre-indexed (alignment mark included) or requires a phasing tool during installation, since getting the timing relationship wrong reintroduces the original problem.
| Option | Best for | What you get |
|---|---|---|
| OE-equivalent assembly (housing + sensor) | One-stop repair, no sensor reuse concerns | Drop-in unit with sensor pre-installed; closest match to factory specs |
| Bare housing only | Budg-conscious repair when existing sensor tests good | Synchronizer body and drive gear; reuse your original sensor to save cost |
| Pre-indexed / alignment-mark unit | DIYers without a phasing tool | Factory timing mark molded or stamped in; simplifies cam-to-crank alignment during install |
| OEM or OEM-supplier brand | High-mileage vehicles or second repairs after aftermarket failure | Made by or for the original manufacturer; tightest dimensional tolerances and longest expected service life |
Before removing the old unit, rotate the engine to the manufacturer-specified reference position and note or mark the synchronizer's current orientation so the replacement can be installed in the same relationship. Drop in the new synchronizer with its alignment mark matched to the reference point, secure the hold-down clamp, reconnect the sensor harness, and clear stored fault codes before test-driving. If the engine idles roughly or codes return after replacement, recheck the phasing angle — even a small rotational error is enough to upset ignition and injection timing on the Ford Explorer.