YOSTIPARTS VVT Variable Valve Timing Solenoid for Subaru H4 Engines — 10921AA220 / 916-574, OEM-Style Tested

YOSTIPARTS Engine Variable Valve Timing (VVT) solenoid 916-574 / 10921AA220 is a direct-replacement camshaft oil control valve designed to restore proper VVT operation on compatible Subaru H4 engines.

This camshaft timing solenoid regulates oil flow to the variable valve timing system, helping the engine adjust valve timing across different speeds and loads. Built and tested to meet OEM-style specifications, the YOSTIPARTS VVT solenoid ships as a single boxed unit with clear part-number cross-references so you can confirm fitment before installation.

Which Subaru models and engine sizes does this VVT solenoid fit?

This VVT solenoid is intended for a range of Subaru H4 engines across several model years. Always verify the part number and engine code against your vehicle before purchasing.

• Compatible with BRZ 2013–2015 (H4 2.0L)
• Crosstrek/XV and XV Crosstrek 2013–2016, 2018–2020 and specific Mexico market years (H4 2.0L)
• Forester 2011–2020 (H4 2.0L and H4 2.5L depending on year)
• Impreza 2012–2016 (H4 2.0L), Legacy 2013–2017 (H4 2.5L), Outback 2017 (H4 2.5L)

How does this replacement solenoid relate to OEM part numbers?

The YOSTIPARTS unit cross-references several OEM codes so you can match it to your existing solenoid. It is offered as a compatible alternative for older or worn original valves, helping technicians and DIYers source a correct-fit replacement.

• Cross-reference numbers include: 916-574, 2T1210, 10921AA220, 10921AA230
• Also compatible with 10921AA231, 10921AA240, 10921AA241 variants in many applications
• Sold as a single solenoid with boxed packaging for safe shipping

What quality checks and testing does YOSTIPARTS perform?

Each YOSTIPARTS VVT solenoid is manufactured to match OE-style specifications and undergoes testing before leaving the factory. This reduces the chance of early failure and helps ensure consistent oil control for cam phasing systems.

• Produced to meet original-equipment design criteria
• 100% tested for functional reliability prior to packaging
• Supplied as a single unit so you can replace one faulty solenoid without buying multiples

What should I check before buying and installing this part?

Confirming fitment is crucial: verify your vehicle year, engine displacement, and the OEM part number on the existing solenoid. If you’re uncertain, provide the VIN or part number when contacting the seller for assistance.

• Compare the existing part number on your vehicle to the listed cross-references
• Check engine code (H4 2.0L or H4 2.5L) and model year compatibility
• Reach out to YOSTIPARTS customer support with VIN or photos if you need help confirming fit

Who is this for: Mechanics, independent repair shops, and vehicle owners who need a reliable, OE-style replacement VVT solenoid for select Subaru H4 engines. It’s suited for drivers diagnosing VVT-related faults, technicians performing cam timing repairs, and anyone replacing a known-bad solenoid with a tested aftermarket alternative.