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Choosing the right fuel injector for your Cadillac CTS matters because injectors control fuel delivery, engine responsiveness, and emissions. A poorly performing injector can cause rough idle, reduced fuel economy, and inconsistent power, while the right unit helps the engine run smoothly and reliably under varied driving conditions. This guide covers the top shortlisted fuel injectors for the Cadillac CTS, focusing on units that meet common fitment and performance needs. We evaluated each pick across spray pattern uniformity and flow consistency, plus build quality and ease of installation, to help you decide which option fits your priorities.
Looking for other parts? See all Cadillac CTS parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Bosch 62266 Fuel Injector (single) |  |
| Most Popular A crowd favorite that many people choose with confidence | TA-VIGOR 6-Pack Fuel Injectors for Cadillac CTS 3.6L (4-Hole, EV6 Connector) |  |
| Best Quality Built to a higher standard if you want something more solid | FIREMOTOO Fuel Injectors Pack of 6, 6‑Hole Spray Pattern, Compatible with Cadillac CTS 3.6L V6 (2008–2011) |  |
| Best Budget The cheapest option that still gets the job done reliably | INFINAUTO Fuel Injector Set for Cadillac CTS/SRX 3.6L (6pc) |  |
| Most Sold A high-volume bestseller chosen again and again | Pjvmvo Set of 6 High-Pressure GDI Fuel Injectors for 3.6L GM Engines |  |
| Best Value for Money The sweet spot between price and what you get | MACAX Fuel Injector Kit FJ703 — Set of 6, Replacement for Cadillac CTS SRX STS 3.6L V6 |  |
| Best Overall The best all-around choice for most situations | NECATUO Set of 6 Fuel Injectors (replaces 12634126 / FJ1157) |  |
1. Bosch 62266 Fuel Injector (single)
| Inlet Connection Type | Press |
|---|---|
| Number of Ports | 1 |
| Valve Type | Gate Valve |
| Material Type | Metal, Plastic |
This Bosch 62266 is a factory-quality replacement fuel injector sold individually to replace a failing injector on compatible Cadillac CTS (2004-06) and related GM engines. It restores the injector spray pattern and precision flow rates needed for smooth idle, reliable warm starts, and consistent midrange response. Bosch designs these injectors with high-alloy steels and plastic housings for corrosion resistance and ethanol compatibility, and the package includes seals and O-rings so the unit is ready for installation. In real-world use the injector helps reduce rough running and can improve fuel economy and emissions compared with a leaking or clogged original. Expect straightforward bench and vehicle fitment when the part number matches your engine; however you must verify engine-specific fitment before purchase since compatibility depends on engine variant. Also sold as a single injector, so replacing multiple worn injectors will increase cost and labor compared with multi-pack options.
Best for: A reliability-focused buyer who values restoring factory drivability and emissions control on a Cadillac CTS and prioritizes long-term dependability over lowest upfront cost.
Less Ideal for: Drivers looking for a budget bulk replacement for multiple cylinders or a universal performance upgrade should consider multi-packs or performance injectors instead.
- Factory-quality design with precision spray pattern and flow rates to match original performance
- Includes seals and O-rings for immediate installation
- Materials and construction aimed at corrosion resistance and ethanol fuel compatibility
- Sold as a single injector so replacing multiple cylinders can be more expensive and time consuming
- Fitment depends on engine variant so you must confirm compatibility for your CTS before ordering
Verdict A factory-quality single replacement injector ideal for restoring reliable, stock-like performance on compatible Cadillac CTS engines, provided you confirm engine-specific fitment.
2. TA-VIGOR 6-Pack Fuel Injectors for Cadillac CTS 3.6L (4-Hole, EV6 Connector)
| Connector Type | EV6 |
|---|---|
| Number of Ports | 4 |
| Flow Rate | 240 cc/min |
| Voltage | DC 12V |
These TA-VIGOR injectors are sold as a 6-pack replacement for Cadillac CTS 3.6L engines and are intended to restore proper fuel delivery across all cylinders. They use an EV6 electrical connector and a four-hole disc orifice to produce a targeted spray pattern and a rated flow around 240 cc/min, which helps maintain smooth idling and consistent throttle response when installed as a full set. The metal and plastic construction and included O-rings make them a direct-replacement style unit that a technician can install without modifying the fuel rail, so this is a practical option for a routine injector service. Buyers should be aware that aftermarket spray patterns and flow specs can vary from factory injectors; a professional flow test or calibration is recommended if you need precise matching to factory data. Some users report mixed compatibility across engines, so confirm the OE part number and symptom diagnosis before committing to replacement.
Best for: Convenience-driven buyers who want a single kit to replace all CTS 3.6L injectors quickly and minimize shop time by using a plug-and-play solution.
Less Ideal for: Owners seeking exact factory injector calibration for performance tuning or those unwilling to verify OE part numbers and flow data beforehand should consider OEM replacements or professional remanufactured injectors.
- Sold as a full six-injector kit for replacing all cylinders at once
- EV6 connector matches factory-style electrical plug on many Cadillac CTS 3.6L engines
- Four-hole orifice and specified flow rate intended to restore even fuel distribution
- Includes O-rings and clips for straightforward plug-and-play installation
- Aftermarket spray pattern and injector data are not identical to every factory injector so flow matching may be required
- Some buyers report fitment or performance discrepancies on non-listed engines
Verdict A practical six-injector plug-and-play kit for Cadillac CTS 3.6L owners who prioritize quick, complete replacement over factory-matched calibration.
3. FIREMOTOO Fuel Injectors Pack of 6, 6‑Hole Spray Pattern, Compatible with Cadillac CTS 3.6L V6 (2008–2011)
| Fitment | Cadillac CTS 3.6L V6 2008–2011 |
|---|---|
| Orifice Type | 6 holes |
| Material | Metal, Plastic |
| Package | 6 fuel injectors |
| Inlet/Outlet Connection | Compression |
These FIREMOTOO injectors are a direct-replacement style kit sold as a pack of six for the Cadillac CTS 3.6L V6 (2008–2011). They use a metal/plastic composite body, a six‑hole orifice pattern and come with O‑rings for sealing. In use they aim to restore smooth idle, consistent spray pattern and proper fuel metering—benefits that translate to crisper throttle response and steadier combustion on a CTS when stock injectors are worn or clogged. The listing highlights CNC-drilled holes and uniform atomization to match factory spray characteristics, and several user reports note improved idle and regained power after installation. Installation is straightforward for a trained technician, and the kit is sized for direct fitment without modification. Limitations are typical of aftermarket injectors: long-term durability and exact flow matching to factory tolerances can vary, and careful calibration or cleaning of the fuel rail and intake is recommended during swap to avoid premature issues. These injectors are best installed with proper tools and basic fuel-system maintenance.
Best for: Performance-oriented owners looking to restore engine smoothness and throttle response on a Cadillac CTS 3.6L V6 (2008–2011) who prioritize improved combustion and drivability.
Less Ideal for: Owners seeking an OEM-sourced injector or those unwilling to perform fuel‑system maintenance and proper installation should consider factory-quality replacements or professional service instead.
- Pack of six covers all cylinders for a full replacement on the CTS V6.
- Six‑hole orifice design for finer atomization and more even spray distribution.
- Includes O‑rings for immediate, sealed installation.
- Manufactured with CNC-drilled spray holes for consistent spray pattern.
- Aftermarket long-term durability and exact flow matching to factory injectors are not guaranteed.
- Requires removal of fuel rail and basic fuel-system service; not a simple plug‑and‑play for untrained DIYers.
Verdict A full six-pack aftermarket replacement that restores spray pattern and drivability on the 3.6L Cadillac CTS V6, best for performance-focused owners willing to install and maintain them.
4. INFINAUTO Fuel Injector Set for Cadillac CTS/SRX 3.6L (6pc)
| Vehicle fitment | Cadillac CTS 3.6L 2004-2007; Cadillac SRX 3.6L 2004-2006 |
|---|---|
| Connector Type | Plug |
| Number of Ports | 4 |
| Valve Type | electromechanical |
This six-pack of INFINAUTO fuel injectors is a direct replacement option for Cadillac CTS and SRX 3.6L engines from 2004 to 2007 (CTS) and 2004 to 2006 (SRX). Constructed from metal with plastic components, the injectors are sold as a complete set of six to swap all cylinders at once. Installation is straightforward for a competent DIYer and the package is intended to replace worn or failing injectors to restore smooth idling and fuel delivery. The product information highlights press-style connections and an electromechanical valve design, which matches typical factory injector operation. As a budget-oriented part, it offers a low-cost way to refresh an aging fuel system, but it may not match the validation and longevity of higher-end OEM replacement injectors. You should inspect seals and connectors during installation and consider professional installation if you lack fuel-system experience.
Best for: A budget-conscious buyer who needs a full injector refresh for a mid-2000s Cadillac CTS or SRX and prioritizes cost savings over OEM-level validation.
Less Ideal for: Drivers seeking guaranteed factory-quality longevity or verified performance upgrades should consider higher-end or OEM replacement injectors instead.
- Sold as a complete 6-piece set for replacing all injectors at once
- Metal construction for corrosion resistance compared with all-plastic units
- Plug-style electrical connector and press connections that match factory-style installation
- Electromechanical valve design consistent with standard fuel injector operation
- Not marketed as a branded OEM or remanufactured injector so long-term durability is uncertain
- Limited published test data or validation compared with premium factory-quality replacements
Verdict A low-cost six-injector set that can restore fuel delivery on 3.6L Cadillac CTS/SRX engines but may not match long-term durability of premium factory-quality replacements.
5. Pjvmvo Set of 6 High-Pressure GDI Fuel Injectors for 3.6L GM Engines
| Brand | Pjvmvo |
|---|---|
| Model | GMFI3445GDI |
| Fitment note | 3.6L GDI 6‑cyl GM engines (used in Cadillac CTS) |
This set of six high-pressure GDI injectors is offered as a direct replacement for 3.6L GM engines and is intended for use where Cadillac CTS owners need to service the fuel injection system. The kit is sold as factory-replacement style injectors and arrives individually packaged; the listing says units are inspected, cleaned, and tested before shipping. Installation replaces the failed injectors to restore fuel delivery under GDI pressures and should return idle smoothness and throttle response to factory-like levels. Notable points are the complete set for all six cylinders and the seller inspection process, which reduces the risk of receiving obviously defective parts. Expect some installation difficulty typical of high-pressure GDI systems and be prepared for dealer‑level tools or a professional install if you lack experience. The product is positioned as a lower-cost alternative to dealer parts but does not include installation hardware or a professional warranty statement, so buyers who want full dealer support may prefer buying through a Cadillac parts channel.
Best for: Risk-averse mainstream buyers seeking a cost-conscious, inspected replacement that restores stock-like operation on a Cadillac CTS with a 3.6L GDI engine.
Less Ideal for: Customers who prioritize dealer parts support, extended warranties, or want a full-service installation package should consider alternatives from authorized Cadillac parts sources.
- Sold as a complete set of six injectors for all cylinders, avoiding individual mismatch issues
- Seller-inspected, cleaned, and tested units which lowers the chance of gross defects on arrival
- Packaged individually to reduce shipping damage risk
- Direct-replacement design intended to restore original fuel delivery and engine smoothness
- No explicit manufacturer warranty or labor coverage is stated in the listing
- May require specialized tools or dealer-level procedure to install correctly on GDI systems
Verdict A budget-friendly, seller-tested set of six high-pressure GDI injectors aimed at restoring factory-style performance on a 3.6L Cadillac CTS but without dealer warranty or installation services.
6. MACAX Fuel Injector Kit FJ703 — Set of 6, Replacement for Cadillac CTS SRX STS 3.6L V6
| Connector Type | Push-in |
|---|---|
| Number of Ports | 12 |
| Valve Type | Fuel Injector |
| Material Type | Composite |
This MACAX kit supplies six fuel injectors intended as direct replacements for 3.6L V6 Cadillacs such as the CTS, SRX, and STS (VIN:7). Each injector is made from a corrosion-resistant composite and uses high-temperature viton O-rings, which should help long-term sealing and reduce leak risk during routine service. The parts are sized to match factory fitment and are sold as a complete set, so they are convenient for a full-bank replacement during a tune-up or when diagnosing misfires and rough idle. In practice the kit can restore balanced fuel delivery and smoother idle when the original injectors are worn, but fitment must be checked carefully against vehicle specifics because some buyers reported incompatibility with non-listed models. Installation is typical for injector swaps and benefits from cleaning the rail and using new seals. Expect good value for a full six-pack, though results depend on correct fit and proper installation; this is a practical replacement rather than a performance upgrade.
Best for: A practical optimizer who wants a cost-effective, full-bank replacement to restore smooth idle and consistent fuel delivery on a Cadillac CTS 3.6L V6 VIN:7 without seeking performance gains.
Less Ideal for: Drivers looking for higher-flow performance injectors or those needing parts for non-listed vehicles should consider purpose-built or model-specific alternatives.
- Sold as a complete set of six for full-bank replacement
- Composite construction resists corrosion for longer service life
- High-temperature viton O-rings improve sealing reliability
- Designed to match factory fitment for Cadillac 3.6L V6 VIN:7 applications
- Some buyers reported fitment issues on unsupported models, so verification is required
- Not a performance injector — intended as a factory-style replacement
Verdict A budget-friendly, six-piece factory-style replacement kit that restores fuel delivery on 3.6L Cadillac V6 engines when fitment is confirmed.
7. NECATUO Set of 6 Fuel Injectors (replaces 12634126 / FJ1157)
| Manufacturer Part Number | NEC-PYZ2-6P-FJ1157 |
|---|---|
| OEM Part Number | 12634126, 12642128, FJ1157 |
| Package Quantity | Set of 6 |
| Brand | NECATUO |
This NECATUO kit supplies six replacement fuel injectors intended as direct-fit replacements for Cadillac CTS applications that call for part number 12634126 / FJ1157. Installed in place of the factory injectors, the units aim to restore smooth idling, steady acceleration, and consistent fuel delivery after injector failure. The injectors are described as built to OEM-style specifications, with corrosion-resistant composite construction and high-temperature Viton O-rings to help resist fuel degradation and heat. Buyers report straightforward plug-and-play fitment on the correct CTS engines, which makes these useful for a full-bank replacement when cleaning or repair is not possible. Expect the practical benefit of renewed drivability without needing dealer parts, but be aware of mixed quality reports: several users noted occasional stuck or leaking injectors and O-ring fitment issues, so careful inspection at install and testing for fuel leaks and proper spray pattern is prudent. The kit comes with a one-year seller warranty for replacement support.
Best for: Balanced all-round buyers looking for an affordable, full-bank replacement that restores drivability on Cadillac CTS models with failing injectors and who value a pragmatic mix of cost and convenience.
Less Ideal for: If you prioritize guaranteed factory-quality performance or need parts for models other than the specified Cadillac CTS fitment, choose a factory-quality injector or dealer-sourced replacement instead.
- Sold as a complete six-injector set for easy full-bank replacement
- Designed to match factory part number 12634126 / FJ1157 for direct fit on compatible Cadillac CTS engines
- Corrosion-resistant composite body and high-temp Viton O-rings for improved durability under heat and fuel exposure
- Plug-and-play electrical/connectors reported by multiple users for simple installation
- Some customers reported individual injectors arriving faulty, including stuck-open or dead units
- Occasional O-ring fitment issues requiring replacement O-rings or additional mechanic time
- Non-OEM part quality can vary so you may need to bench-test injectors before installation
Verdict A cost-effective, direct-fit six-pack for Cadillac CTS injector replacement that can restore drivability but requires careful inspection due to variable quality.
Choosing the Right Cadillac CTS Fuel Injector: Key Factors to Consider
Flow Rate and Calibration
Flow rate determines how much fuel the injector delivers at a given pressure and pulse width, and accurate calibration ensures each cylinder receives the intended amount of fuel.
Mismatched or poorly calibrated flow can cause lean or rich conditions, leading to rough idle, increased emissions, or reduced fuel economy. For the Cadillac CTS, choose injectors with documented flow specs and low variance between units. Consider whether your engine has modifications that require higher or lower flow, and match the injector rating accordingly to maintain stoichiometry under typical driving loads.
Spray Pattern and Atomization
The spray pattern affects how fuel mixes with incoming air, which influences combustion efficiency and throttle response.
Good atomization promotes uniform air-fuel mixtures, reducing cold-start issues and minimizing misfires under load. Look for injectors that specify a focused or multi-hole spray design suited to the CTS intake geometry. Consistent spray across operating conditions helps maintain smooth idle and steady power delivery.
Electrical Compatibility and Connector Fit
Electrical compatibility ensures the injector will operate correctly with the vehicle's wiring harness and engine control signals.
Correct connector type, pinout, and coil resistance prevent issues such as intermittent firing or electrical overheating. Using an injector with the wrong electrical characteristics can stress the ECU drivers or cause erratic performance. Confirm the injector matches the Cadillac CTS connector and that its impedance aligns with stock specifications for reliable operation.
Seal Quality and Leakage Resistance
Seals and O-rings keep fuel contained under pressure and prevent external leaks that create fire or drivability hazards.
High-quality seals resist swelling, cracking, and degradation from fuel additives and heat cycles. Leak-resistant designs also reduce the risk of vacuum leaks at the intake and maintain proper fuel pressure. For the CTS, pick injectors with durable sealing materials and easy access to replacement O-rings during service.
Durability and Clogging Resistance
Durability factors such as internal filter design and resistance to deposits determine how long an injector will function before service is needed.
Injectors that resist clogging maintain consistent spray and flow over many miles, reducing the frequency of cleaning or replacement. Consider injectors with protective internal filters or coatings that handle common fuel contaminants. Longevity reduces ownership hassle and helps preserve fuel economy and smooth operation.
Serviceability and Availability of Parts
Serviceable injectors and readily available service parts make maintenance simpler and less disruptive.
Availability of replacement seals, pintles, and diagnostic resources can save time during repairs. Ease of removal and reinstallation, plus clear access to associated components like rails and rails bolts, reduces labor effort. For the Cadillac CTS, favor injectors with common service parts and clear installation guidance to streamline upkeep.
FAQ
How do I know if a Cadillac CTS fuel injector is failing?
Symptoms often include rough idle, misfires, decreased fuel economy, or uneven acceleration. You may also notice a persistent check engine light with codes related to fuel trim or misfires. Visual signs such as fuel smell or visible leaks are less common but indicate urgent attention.
Can I clean a clogged fuel injector instead of replacing it?
Cleaning can restore performance in many cases, especially when deposits are the primary issue. Professional ultrasonic cleaning or targeted chemical cleaning often improves spray and flow, but severely worn or damaged injectors usually need replacement. Testing flow before and after cleaning helps gauge effectiveness.
What does fuel injector testing involve for a Cadillac CTS?
Testing typically includes electrical checks of coil resistance, verifying injector pulse with a scope or noid light, and measuring flow or spray pattern on a bench tester. On-vehicle diagnostics can also examine fuel trims and misfire counts to infer injector health. Combine electrical and flow tests for a reliable assessment.
Are leak symptoms obvious with fuel injectors?
Leaks may present as a fuel smell, visible wetness around the injector or intake, or hard starting and rough idle due to altered fuel pressure. Small internal leaks can be subtle and appear as rich running conditions or fouled spark plugs. Any sign of leakage should be addressed promptly for safety.
Is a performance upgrade worth it for injectors on a Cadillac CTS?
Upgrading injectors can be beneficial if you have engine modifications that increase fuel demand, such as forced induction or higher power tuning. However, matching flow rate and maintaining proper calibration is critical. Without supporting engine changes and tuning, larger injectors can cause drivability issues.
How often should fuel injectors be serviced on a Cadillac CTS?
Service intervals vary with fuel quality and driving conditions, but many injectors benefit from inspection or cleaning every 50,000 to 70,000 miles. If you notice performance changes sooner, have injectors tested. Preventive maintenance can extend injector life and preserve engine smoothness.
How We Chose the Best Cadillac CTS Fuel Injector
To compile this list we applied targeted filters that matter specifically for Cadillac CTS fuel injectors. We prioritized injectors with documented flow-rate consistency and tight spray-pattern tolerances because those factors directly affect combustion efficiency and idle smoothness. Material quality and resistance to common failure modes such as clogging and leakage were assessed to ensure long-term reliability in typical driving conditions. Electrical and connector compatibility with the CTS fuel-rail and harness was included to minimize installation complexity and avoid secondary issues. We also considered ease of serviceability and the availability of replacement seals and O-rings. Exclusions: we excluded injectors lacking clear technical specifications, units with unknown flow calibration, and any parts that require extensive fuel-system modification. The final selections balance precision, durability, and practical fitment for the Cadillac CTS platform.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize injectors that match the Cadillac CTS flow and electrical specifications while offering durable seals and consistent spray patterns. Balance your choice between long-term reliability and any performance needs such as increased flow for modified engines. Remember that accurate testing and proper installation are as important as the injector itself. Focus on flow accuracy, spray quality, and serviceability to ensure the engine runs smoothly and efficiently for miles.
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