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Picking the right Scion xD intake manifold matters because it directly affects airflow, engine responsiveness, and long-term reliability. A correct manifold ensures proper sealing, consistent vacuum, and predictable idle behavior, which are all important for everyday driving and maintenance. This guide highlights the top shortlisted options for the Scion xD and explains the criteria used to evaluate them, including fitment, sealing, and durability. Read on to see which manifolds made the list and why they were selected before you move on to installation or service details.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | GM Genuine Parts Intake Manifold Assembly |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman Intake Manifold Runner Control Motor (911-922) |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 615-565 Engine Intake Manifold |  |
| Best Budget The cheapest option that still gets the job done reliably | Flynsu Intake Manifold Replacement PE11-13-100B |  |
| Most Sold A high-volume bestseller chosen again and again | GM Genuine Parts Intake Manifold Kit with Seals |  |
| Best Value for Money The sweet spot between price and what you get | Dorman 615-188 Replacement Plastic Intake Manifold with Gaskets (Made in USA) |  |
| Best Overall The best all-around choice for most situations | Dorman 615-380KIT Intake Manifold and Valve Cover Kit |  |
1. GM Genuine Parts Intake Manifold Assembly
| Model | Intake Manifold Assembly |
|---|---|
| OEM Part Number | 12639087 |
| Exterior | Machined |
| UPC | 808709067702 |
This GM Genuine Parts intake manifold is a factory-quality replacement intended to restore correct air delivery and sealing on compatible GM engines. It installs like a direct-fit factory component and is typically used when a worn, cracked, or upgraded manifold is needed to return engine performance and drivability to spec. Notable features include GM validation for fit and function and machined exterior surfaces that match factory mating faces. In real-world use it offers the peace of mind of a manufacturer-backed part and usually needs no extra machining or modification for proper fit. Users report straightforward installs and improved throttle response when used in compatible swaps. Limitations to be aware of are fitment sensitivity and occasional shipping damage reported to delicate plastic or hose nipples, so inspect the part on arrival and plan for replacement small hoses or fittings if needed. This part is a solid choice when you want a like-for-like factory replacement rather than an aftermarket performance custom piece.
Best for: A reliability-focused buyer who prioritizes factory-quality replacements and wants a direct-fit intake to restore consistent engine performance without aftermarket modification.
Less Ideal for: Buyers seeking a high-performance or heavily ported aftermarket manifold for maximum power gains should look at performance-specific options instead.
- Factory-validated design for OEM fit and function
- Machined mating surfaces for reliable sealing and alignment
- Packaging and support from the GM Genuine Parts program
- Good real-world compatibility for common engine swap applications reported by installers
- Some customers report fragile plastic fittings or PCV nipple breakage during shipping or handling
Verdict Choose this GM Genuine Parts intake if you want a factory-quality, direct-fit replacement to restore reliable engine performance.
2. Dorman Intake Manifold Runner Control Motor (911-922)
| Brand | Dorman |
|---|---|
| Material | Alloy Steel |
| Manufacturer Part Number | 911-922 |
| OEM Part Number | 28323-2G000; 28323-2G300 |
This Dorman intake manifold runner control motor replaces the factory unit that actuates the intake manifold flaps. It installs where the original motor mounts to the manifold and uses factory-style electrical connectors for a plug-and-play replacement on supported vehicles. In real-world use it typically clears P200A/P2004-style codes and restores proper flap movement, which can remove a check engine light and improve idle smoothness. Notable features include a direct-fit electrical connector and engineered components intended to match factory function. Buyers report the part is robust and resolves common runner-control failures when the flap mechanism itself is still serviceable. Important limitations are fitment sensitivity and accessibility: this is only a motor, not a full manifold, so a stuck or damaged flap or coupler may require replacing the entire manifold; some vehicles need partial disassembly to reach the motor and installation can be fiddly. Also compatibility must be confirmed before purchasing to avoid a wrong fit.
Best for: Convenience-driven DIYers who prioritize a straightforward repair that replaces just the failing actuator to quickly clear codes and restore normal operation.
Less Ideal for: Drivers who suspect internal manifold damage or seized flaps should avoid this part and consider replacing the entire intake manifold or seeking professional diagnosis.
- Designed to match factory electrical connectors for direct replacement
- Built to restore intake runner flap actuation and clear related engine codes
- Durable construction intended for long-term service in an underhood environment
- Not a full intake manifold so it will not fix mechanically seized flaps or damaged manifold components
- Fitment is vehicle-specific so incorrect selection can lead to wasted disassembly time
Verdict A practical, factory-style replacement motor for fixing runner-control failures when the flap assembly itself is serviceable, but confirm fitment first since it does not replace the entire manifold.
3. Dorman 615-565 Engine Intake Manifold
| Automotive Fit Type | Universal Fit |
|---|---|
| Model | 615-565 |
| Position | Center |
| Manufacturer | Dorman Products |
This Dorman intake manifold replaces a faulty or worn factory manifold and is built to restore proper air delivery and eliminate rattles caused by broken internal baffles. It is used as a direct replacement on compatible engines and arrives ready to install with intake and throttle body gaskets included. Notable features include factory-style fitment, tested construction aimed at OEM-level performance, and an exterior that can be painted if desired. In real-world use owners report it resolves rattling and idle issues and bolts into place without modification on supported vehicles. Installation requires disassembly of surrounding components and some hard-to-reach bolts may be easier with power tools or extended sockets. The part is plastic, so while fit and finish are generally good, longevity depends on installation care and operating conditions. Expect a straightforward swap that returns quiet, smooth operation but be prepared for a moderately involved install when replacing the original manifold on the engine.
Best for: Performance-oriented buyers who prioritize restoring engine airflow and eliminating intake-related noise to return the vehicle to smooth, quiet operation while keeping a factory-like installation.
Less Ideal for: If you want an upgraded performance manifold tuned for increased airflow or forced-induction use, look for performance-specific aftermarket options instead.
- Designed to match original fit and function for direct replacement on listed vehicles
- Includes intake and throttle body gaskets for a ready-to-install assembly
- Tested construction targeting factory-quality performance and durability
- Exterior finish is paint-ready for aesthetics or corrosion protection
- Made from plastic rather than metal which may affect long-term durability in extreme conditions
- Installation can be labor-intensive with hard-to-access bolts requiring specialty tools
Verdict A factory-style replacement that reliably fixes rattles and restores proper intake function for supported vehicles, but it is a plastic, direct-replacement part rather than a performance upgrade.
4. Flynsu Intake Manifold Replacement PE11-13-100B
| Manufacturer | Flynsu |
|---|---|
| Manufacturer Part Number | PE11-13-100B, PE1113100B |
| Applicable Models | Replacement for Mazda 3 2014-2018, CX-5 2013-2016, CX-3 2016-2018 |
This Flynsu intake manifold is a direct-replacement style assembly intended to restore the intake path on compatible 2.0L SKYACTIV engines. It comes as a full unit with gasket so a DIYer or independent shop can swap it in when a cracked manifold or vacuum leak causes rough idle, loss of power, or check engine codes. In real-world use it replicates the factory mounting points and ports so fitment and bolt-up are straightforward when the engine and surrounding components match the specified application. The practical benefits are clear: it provides an affordable route to repair intake-related drivability issues without sourcing a used OEM part, and customer feedback indicates consistent fit and function. Limitations are typical of budget replacements — you may see variability between units, and longevity may not match a higher-end factory-quality part. Also confirm the part number and serial to ensure correct fit before installation because application listings differ across Mazda and related models.
Best for: Budget-conscious DIYers or independent-shop owners looking to fix intake leaks or replace a damaged manifold without paying dealer prices.
Less Ideal for: Those seeking a long-term factory-quality replacement or performance upgrade should consider higher-end or OEM-sourced manifolds instead.
- Full intake manifold assembly supplied with gasket for a single purchase replacement.
- Designed to match factory mounting points for straightforward bolt-up when matched to the listed engine.
- Low-cost option compared with used OEM or dealer parts.
- Positive owner reports of accurate fit and immediate restoration of normal idle and performance.
- Build and material quality may be lower than factory-quality parts which could affect long-term durability.
- Fitment must be confirmed against the vehicle serial or part number before purchase to avoid mismatch.
Verdict A cost-effective complete replacement that restores intake function for compatible 2.0L SKYACTIV engines but may not match OEM durability.
5. GM Genuine Parts Intake Manifold Kit with Seals
| Brand | GM GENUINE PARTS |
|---|---|
| Manufacturer | ACDelco |
| Item model number | 19330172 |
| Fit type | Vehicle Specific |
This GM Genuine Parts intake manifold kit supplies a factory-quality replacement designed to meet General Motors specifications. The kit includes the manifold and seals intended to restore proper air routing to the engine and to re-establish a leak-free intake system. Typical use is a direct replacement during a repair where the original manifold has cracked, warped, or begun to leak; installers will appreciate that it is manufactured to match factory fit and mounting points. Notable features include GM validation and parts engineered to the same standards used in production, which helps reduce fitment surprises and ensures reliable operation when installed correctly. Practical benefits are improved sealing, retained engine performance, and long-term durability expected from a factory-quality part. Limitations are that fitment is vehicle-specific and buyers must confirm compatibility with their Scion xD engine and year, and occasional reports note accessory or hole misalignment on some applications which can require return or adjustment.
Best for: Risk-averse mainstream buyers who prioritize factory-quality replacements and want a part validated against manufacturer standards for straightforward repair and long-term reliability.
Less Ideal for: Shoppers seeking a universal or performance-oriented intake upgrade or those unwilling to verify exact year and engine fitment before purchase.
- Manufactured and validated to General Motors factory standards for fit and function
- Includes seals to help restore a leak-free intake system
- Designed as a direct replacement to minimize installation surprises
- Backed by a long-established GM parts pedigree for reliability
- Vehicle-specific fitment can be inconsistent for some applications
- Some buyers reported incorrect accessories or misaligned holes requiring exchange
Verdict Choose this GM Genuine Parts intake manifold kit if you want a factory-validated, direct replacement to restore dependable intake sealing, but confirm exact Scion xD fitment before buying.
6. Dorman 615-188 Replacement Plastic Intake Manifold with Gaskets (Made in USA)
| Made in | USA |
|---|---|
| Includes | Manifold, thermostat, gaskets, O-ring, coolant fitting, self-tapping screws |
| Engine fitment note | Designed to match factory fit and performance |
This Dorman intake manifold is a full replacement kit intended to restore intake sealing and coolant routing while matching factory performance. It arrives as a polymer manifold with integrated gaskets, an auxiliary coolant fitting, thermostat, O-ring and self-tapping screws so you get the major parts needed for a swap without sourcing extras. The integrated gaskets sit in the manifold instead of on a carrier gasket which reduces possible leak points in real-world use. Buyers will appreciate the included updated thermostat and PCV nipple that address common coolant and vacuum concerns, and the factory-quality fit is aimed at straightforward installation when access and labor allow. Expect a repair-level solution rather than a performance upgrade; some installers note the manifold requires careful torque and can need more time on older engines. For a practical optimizer value pick this manifold bundles parts and reduces trips to the parts store, but installation complexity and the need to follow torque specs are important considerations.
Best for: Practical optimizers seeking the best value for a full intake manifold repair who prioritize getting a complete, factory-quality replacement kit that reduces parts hunting and repeat visits.
Less Ideal for: Buyers looking for a performance intake or lightweight track component should consider specialty performance manifolds instead of this repair-focused unit.
- Complete kit that includes manifold, integrated gaskets, thermostat, O-ring and coolant fitting to simplify a full replacement.
- Integrated gasket design reduces mating surfaces with the head to help prevent air leaks.
- Made in the USA and engineered to match factory fit and function for reliable replacement.
- Includes self-tapping screws and clamp so fewer additional fasteners are required during installation.
- Polymer construction requires careful torqueing of fasteners to avoid damage compared with metal alternatives.
- Designed as a direct replacement rather than a performance-oriented manifold, so it will not increase peak power.
Verdict A budget-minded, ready-to-install replacement that bundles the necessary parts for a reliable repair rather than a performance upgrade.
7. Dorman 615-380KIT Intake Manifold and Valve Cover Kit
| Material | Metal |
|---|---|
| Inlet Connection Type | positive crankcase ventilation |
| Outlet Connection Type | PCV |
| Number of Ports | 1 |
| Position | Center |
This Dorman kit bundles a redesigned intake manifold with a matching valve cover and PCV tube to address a common failure chain on GM 1.4L Ecotec engines. It is intended as a direct factory-quality replacement and is typically used when a failed PCV/check valve leads to rough idle, oil consumption, or P1101-style codes. The updated manifold design corrects the OEM check valve weakness, while the matched valve cover and hose simplify installation by replacing all damaged components at once. Buyers report straightforward installation with standard hand tools and clear instructions, and several users noted the check engine light and drivability issues cleared after the swap. Limitations include plastic fastener points on the intake that rely on threading into the intake material rather than metal inserts, and the kit does not include any additional hardware upgrades beyond basic bolts. For Scion xD owners using the GM 1.4L Ecotec platform, this kit provides a focused, long-term fix; installers should be cautious when tightening fasteners and consider thread reinforcement if desired.
Best for: Buyers seeking a balanced, reliable repair that fixes the root cause of PCV-related drivability and oil consumption problems without overcomplicating the job.
Less Ideal for: People wanting a performance upgrade, custom manifold, or a kit with reinforced mounting hardware should look elsewhere.
- Complete repair kit replaces intake manifold, valve cover, and PCV tube to address the full failure chain
- Redesigned intake corrects the common PCV/check valve defect found in the original design
- Fits and installs like a factory replacement for straightforward swapouts
- Clear instructions and commonly available hardware make DIY replacement feasible
- Some intake mounting points use plastic threads and the supplied bolts can be fragile
- Does not include metal threaded inserts or upgraded fasteners
- Fitment is specific to vehicles with the GM 1.4L Ecotec engine and not universal
Verdict A practical, factory-style replacement kit that fixes the ECOTEC PCV/manifold failure by replacing all affected components in one go.
Choosing the Right Scion xD Intake Manifold: Key Factors to Consider
Material and Construction Quality
The manifold material influences durability, heat soak, and gasket seating. Cast aluminum offers rigidity and consistent sealing surfaces, while composite or plastic manifolds can reduce weight and thermal transfer but must be well reinforced to avoid warpage. Look for manifolds with uniform port shapes and smooth internal runners to promote consistent airflow. Pay attention to the quality of mating flanges and bolt bosses; these areas are prone to distortion if poorly made.
Bolting locations and stud quality matter for maintaining a stable clamping force over time. Reinforced mounting areas reduce the chance of thread pull-through or elongation, which can lead to leaks and poor performance. Good construction reduces the likelihood of premature failure and makes maintenance easier.
Sealing and Gasket Interface
A reliable seal between the manifold and cylinder head is vital to prevent air and vacuum leaks. The gasket design should match the manifold flange profile and provide even compression across ports. Materials used for gaskets should resist oil and coolant exposure when applicable and maintain sealing under thermal cycling.
Inspect how the manifold compresses the gasket and whether there are raised or recessed features that could concentrate clamping load. Uneven compression is a common cause of intake manifold symptoms like rough idle or intermittent vacuum loss. Properly designed sealing surfaces reduce the need for re-torquing and limit the risk of leaks developing over time.
Fitment and Compatibility
Exact fitment to the Scion xD matters for a trouble-free installation and to preserve stock sensor and hose routing. A manifold that aligns with intake ports, vacuum ports, throttle body mounting, and sensor locations reduces the need for modifications. Check whether the manifold accommodates factory PCV, MAP, and coolant passages as required.
Manifolds that require adapters or custom plumbing increase installation time and introduce more potential failure points. Prioritize options that were designed or verified for the specific engine layout to ensure straightforward replacement and reliable operation.
Vacuum Integrity and Port Design
Consistent vacuum is essential for idle stability, fuel metering, and emissions control. Port geometry and the smoothness of internal surfaces affect airflow distribution among cylinders. Avoid manifolds with rough castings or abrupt transitions that can create turbulence and uneven cylinder filling.
Good vacuum integrity also reduces the likelihood of intake manifold leak issues and associated diagnostic headaches. Consider whether the manifold design minimizes dead volume and positions vacuum takeoffs to match factory routing, which helps preserve engine drivability.
Installation Accessibility and Torque Specs
Ease of installation affects total labor time and the chance of installation errors. Manifolds that allow clear access to mounting bolts and attach in a logical sequence reduce the risk of improper tightening. Availability of documented torque specs and recommended tightening sequence is important to ensure even gasket compression.
Torque specs that are easy to find in service literature or provided by the manufacturer help you avoid over- or under-tightening, both of which can cause leaks or thread damage. Consider how much disassembly is required to reach the manifold and whether common hand tools will suffice.
Serviceability and Maintenance Considerations
Think about long-term maintenance tasks such as intake manifold cleaning, gasket replacement, and access to sensors. Some manifold designs make it easier to clean carbon buildup or to replace gaskets without disturbing adjacent components. Ease of disassembly and reassembly can reduce service time and cost.
Manifolds that preserve OEM routing for hoses and sensors simplify diagnostics, including intake manifold vacuum leak diagnosis. Assess whether replacement gaskets and hardware are readily available and if the manifold design minimizes parts that commonly fail, as this affects ownership experience over time.
FAQ
What are common intake manifold symptoms I should watch for in a Scion xD?
Common symptoms often include rough idle, reduced engine responsiveness, and occasional stalling. You might also notice a persistent vacuum-related check engine light or inconsistent idle speed. These signs usually prompt inspection for sealing problems, gasket failure, or vacuum leaks rather than immediate replacement.
How do I know if an intake manifold has a leak?
A leak is often suggested by hissing sounds near the intake, visible cracks or gaps at the gasket interface, and diagnostic trouble codes indicating lean conditions. You can also perform a smoke test or use a controlled spray of a safe cleaning fluid around flanges while the engine is running to see if idle changes, which helps locate leaks. Professional diagnosis can confirm the source before parts are replaced.
Can I replace the intake manifold myself?
Many owners can handle the replacement if they have mechanical experience and the right tools. Tasks include detaching hoses, sensors, and throttle body connections, and following the correct torque specs and tightening sequence during reassembly. If you are unfamiliar with engine work or lack access to service information, consider professional help to avoid leaks or sensor damage.
How important are torque specs when installing an intake manifold?
Torque specs are critical for achieving even gasket compression and preventing leaks. Over-tightening can warp flanges or strip threads, while under-tightening may allow vacuum leaks and poor sealing. Always follow the published torque values and tightening sequence for the engine to ensure consistent results.
When should I consider intake manifold cleaning versus replacement?
Cleaning is often appropriate when buildup or minor carbon deposits affect airflow but the manifold and gasket surfaces are otherwise sound. Replacement is warranted if there is visible cracking, warpage, or repeated leaks at the mating surfaces. Inspect the manifold thoroughly and assess gasket condition before deciding on cleaning or full replacement.
How We Chose the Best Scion xD Intake Manifold
We focused on components that offer precise fitment to the Scion xD, durable sealing surfaces, and proven resistance to common failure modes. Evaluation criteria included material and construction quality, intake manifold gasket seating and design, compatibility with stock sensors and plumbing, and evidence of consistent vacuum integrity under normal operating conditions. We also considered ease of installation, the clarity of torque specs and service guidance, and the accessibility of replacement parts. We excluded options that required major engine modifications, aftermarket adapters, or unverifiable fitment claims. Units lacking clear guidance on sealing surfaces or those with common reports of vacuum leaks were not included. The final list prioritizes manifolds that balance reliable sealing, straightforward installation, and compatibility with stock engine management.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Scion xD intake manifold, prioritize fitment, sealing integrity, and build quality. These factors most directly influence vacuum stability, idle behavior, and long-term reliability. Consider how easy the manifold is to install and service, and ensure torque specifications and gasket interfaces are well documented. Weigh the tradeoffs between material choices, ease of maintenance, and compatibility with factory sensors and hoses. Focusing on these criteria will help you select a manifold that reduces the risk of leaks and preserves consistent engine performance over time.
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