BMW X4 Engines & Components

King SI-Series Main Bearings

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

4.03 out of 5 stars ( 89 )

$159.99

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$168.99

Dorman Valve Covers

Save time and money! Dorman offers a large selection of valve covers constructed from high-quality plastic, steel, or aluminum that resist warping, cracking, and porousness. The metals are corrosion-resistant, and all covers come with the appropriate number of gaskets to provide tight, lasting seals against oil leaks. They are all direct replacements to ensure a proper fit every time. Order the valve covers designed for your specific make/model or engine.

4.84 out of 5 stars ( 49 )

$232.99

Standard Motor Variable Cam Timing Solenoids

Standard Motor variable cam timing solenoids are direct-fit OE replacements for your vehicle's original components. These solenoids effectively restores engine horsepower and torque curves while reducing emissions and improving vehicle efficiency. Standard variable cam timing solenoids have been manufactured to exceed OEM specifications for dependable, accurate, maintenance-free operation.

5.0 out of 5 stars ( 5 )

$140.99

Dorman Variable Valve Timing Solenoids

Dorman variable valve timing solenoids will restore the fuel efficiency and normal operation of your vehicle. These direct replacement solenoids are engineered from quality materials for a proper fit and years of effective performance. They easily plug into the electrical harness and come conveniently packaged with the installation gasket (where applicable). Maintain proper oil flow and pressure with Dorman variable valve timing solenoids.

4.78 out of 5 stars ( 41 )

$116.99

Rein Automotive OE Quality Valve Covers

Rein valve covers are designed and manufactured to be direct replacements for OE units. They have identical dimensions as factory originals—and are manufactured to strict engineering standards, using high quality materials to prevent leaks and warping. The engine valve covers are supplied with a premium gasket to prevent leaks, as well as hardware for easy installation. Most models are supplied with an integrated breather valve. Order the cover recommended for your vehicle and engine application.

5.0 out of 5 stars ( 1 )

$219.99