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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →It can be more appealing if you value naturally aspirated power delivery and prefer not to have turbochargers, but that is a matter of preference—not proof of lower ownership costs or greater reliability. The comparison also needs a specific Ford model and year: Ford’s 2026 F-150 lineup lists a 3.5-liter EcoBoost, not a naturally aspirated 3.5-liter Duratec.
First, identify the Ford and model year
“3.5-liter Duratec” and “3.5-liter EcoBoost” do not describe two engines that are necessarily offered side by side. Availability depends on the vehicle and model year, so a meaningful comparison starts with the exact application.
For the 2026 F-150, Ford lists the 3.5-liter EcoBoost V6 and describes it as twin intercooled turbocharged. Its published ratings are 400 hp and 500 lb-ft. Those are Ford specifications, not results from an independent, same-condition comparison. Ford’s 2026 F-150 specifications
Ford’s 2026 F-150 engine list includes the 2.7-liter EcoBoost V6, 5.0-liter V8, and 3.5-liter EcoBoost V6, among other options; it does not list a naturally aspirated 3.5-liter Duratec. Ford’s 2026 F-150 lineup
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- 【𝗢𝗡𝗟𝗬 𝗡𝗔𝗧𝗨𝗥𝗔𝗟𝗟𝗬 𝗔𝗦𝗣𝗜𝗥𝗔𝗧𝗘𝗗 𝗘𝗡𝗚𝗜𝗡𝗘❗❗❗】:This oxygen sensor kit ONLY fits the Duratec 35 (3.5L) and Duratec 37 (3.7L) engines, NOT work with EcoBoost engines.Please be sure to check your vehicle's engine model before you buy, to avoid any issues with the product not working properly after installation.
- 【𝗙𝗢𝗥 𝗙𝗢𝗥𝗗 𝟯.𝟱𝗟 𝟯.𝟳𝗟 𝗩𝟲 𝗡𝗔 𝗠𝗢𝗗𝗘𝗟𝗦】: Our o2 sensors are made according to the original size,perfect compatible with 2016-2019 ford Explorer Base/Limited/XLT; 2015-2019 Edge; 2016-2019 Flex ; 2016-2019 Taurus; 2016-2019 Transit-150,250,350; 2016-2018 Lincoln MKX Black Label ; 2016-2017 MKT Base; 2018 MKT Premiere; 2019 MKT Livery; 2017-2020 Continental (V6 3.7L)
- 【𝗥𝗘𝗣𝗟𝗔𝗖𝗘 𝗣𝗔𝗥𝗧 𝗡𝗨𝗠𝗕𝗘𝗥】:Upstream O2 sensor: 234-5175 ; Downstream O2 sensor:234-4966
- 【𝗗𝗜𝗥𝗘𝗖𝗧 𝗢𝗘 𝗥𝗘𝗣𝗟𝗔𝗖𝗘𝗠𝗘𝗡𝗧 & 𝗥𝗘𝗦𝗧𝗢𝗥𝗘𝗗 𝗣𝗘𝗥𝗙𝗢𝗥𝗠𝗔𝗡𝗖𝗘】: This upstream & downstream Oxygen Sensor set is designed to match the performance of your original equipment. It ensures precise monitoring of the air-fuel ratio, helping to restore optimal engine power, smooth idling, and overall driving performance, just like when your car was new.
- 【𝗘𝗟𝗜𝗠𝗜𝗡𝗔𝗧𝗘 𝗖𝗛𝗘𝗖𝗞 𝗘𝗡𝗚𝗜𝗡𝗘 𝗟𝗜𝗚𝗛𝗧 & 𝗥𝗘𝗦𝗧𝗢𝗥𝗘 𝗣𝗢𝗪𝗘𝗥】: Is your dashboard lit up with error codes P0420 or P0135? Suffering from rough idling, sluggish acceleration, and a noticeable loss of engine power? Our oxygen sensor is the direct fix. It restores the precise air-fuel data your car's computer needs, turning off that warning light and bringing back your vehicle's responsive drive.
What a historical F-150 comparison shows—and does not show
The 2018 F-150 illustrates why displacement and engine family should not be conflated. Ford listed a naturally aspirated 3.3-liter Ti-VCT V6 rated at 290 hp and 265 lb-ft, alongside a twin-turbocharged 3.5-liter EcoBoost rated at 375 hp and 470 lb-ft. The naturally aspirated engine was not a 3.5-liter Duratec, so these figures are not a same-displacement comparison. Ford’s 2018 F-150 technical specifications
Ford’s 2024 F-150 technical specifications likewise show different engines and configurations, not a controlled test: the 2.7-liter EcoBoost is rated at 325 hp and 400 lb-ft, the 3.5-liter EcoBoost at 400 hp and 500 lb-ft, and the 5.0-liter Ti-VCT V8 at 400 hp and 410 lb-ft. These ratings help describe Ford’s offerings for that model year; they do not establish which engine is better in use. Ford’s 2024 F-150 technical specifications
Rank #2
- 【𝗢𝗡𝗟𝗬 𝗡𝗔𝗧𝗨𝗥𝗔𝗟𝗟𝗬 𝗔𝗦𝗣𝗜𝗥𝗔𝗧𝗘𝗗 𝗘𝗡𝗚𝗜𝗡𝗘❗❗❗】:This oxygen sensor kit ONLY fits the Duratec 35 (3.5L) and Duratec 37 (3.7L) engines, NOT work with EcoBoost engines.Please be sure to check your vehicle's engine model before you buy, to avoid any issues with the product not working properly after installation.
- 【𝗙𝗢𝗥 𝗙𝗢𝗥𝗗 𝟯.𝟱𝗟 𝟯.𝟳𝗟 𝗩𝟲 𝗡𝗔 𝗠𝗢𝗗𝗘𝗟𝗦】: Our o2 sensors are made according to the original size,perfect compatible with 2016-2019 ford Explorer Base/Limited/XLT; 2015-2019 Edge; 2016-2019 Flex ; 2016-2019 Taurus; 2016-2019 Transit-150,250,350; 2016-2018 Lincoln MKX Black Label ; 2016-2017 MKT Base; 2018 MKT Premiere; 2019 MKT Livery; 2017-2020 Continental (V6 3.7L)
- 【𝗥𝗘𝗣𝗟𝗔𝗖𝗘 𝗣𝗔𝗥𝗧 𝗡𝗨𝗠𝗕𝗘𝗥】:Upstream O2 sensor: 234-5175 ; Downstream O2 sensor:234-4966
- 【𝗗𝗜𝗥𝗘𝗖𝗧 𝗢𝗘 𝗥𝗘𝗣𝗟𝗔𝗖𝗘𝗠𝗘𝗡𝗧 & 𝗥𝗘𝗦𝗧𝗢𝗥𝗘𝗗 𝗣𝗘𝗥𝗙𝗢𝗥𝗠𝗔𝗡𝗖𝗘】: This upstream & downstream Oxygen Sensor set is designed to match the performance of your original equipment. It ensures precise monitoring of the air-fuel ratio, helping to restore optimal engine power, smooth idling, and overall driving performance, just like when your car was new.
- 【𝗘𝗟𝗜𝗠𝗜𝗡𝗔𝗧𝗘 𝗖𝗛𝗘𝗖𝗞 𝗘𝗡𝗚𝗜𝗡𝗘 𝗟𝗜𝗚𝗛𝗧 & 𝗥𝗘𝗦𝗧𝗢𝗥𝗘 𝗣𝗢𝗪𝗘𝗥】: Is your dashboard lit up with error codes P0420 or P0135? Suffering from rough idling, sluggish acceleration, and a noticeable loss of engine power? Our oxygen sensor is the direct fix. It restores the precise air-fuel data your car's computer needs, turning off that warning light and bringing back your vehicle's responsive drive.
Why a naturally aspirated engine may appeal
A naturally aspirated engine draws air into the engine without turbochargers. A buyer who prefers that arrangement may value its distinct power delivery or the absence of turbocharger hardware. Those preferences can make a naturally aspirated engine feel like the better fit, even when the alternatives have different output ratings.
That preference alone does not demonstrate better reliability or lower repair and ownership costs. The sources cited here do not provide a directly applicable comparison of longevity, repair costs, or fuel economy under identical conditions. Nor do they establish that a naturally aspirated engine is the better choice for every driver.
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Rank #3
- [Vehicle Fitment]: A-Premium valve covers are compatible with Ford Explorer 2011-2019 (V6 3.5L Naturally Aspirated), F-150 2011-2012 (V6 3.7L Naturally Aspirated), Edge 2011 (V6 3.5L Naturally Aspirated Engine or V6 3.7L Naturally Aspirated Engine), Mustang 2011 (V6 3.7L Naturally Aspirated), Taurus 2011 (V6 3.5L Naturally Aspirated), Fit For Lincoln MKX 2011 (V6 3.7L Naturally Aspirated) ---- Except any models with an eco-boost engine or v6 3.5l turbo engine
- [Reference Part Number]: BR3Z6582G, BR3Z6582C, BR3Z6582R, BR3Z6582E, BR3Z6582H, BR3Z6582M, BR3Z6582P, BR3Z-6582-R, BR3Z-6582-E, BR3Z-6582-H, BR3Z-6582-M, BR3Z-6582-P, BR3Z-6582-G, BR3Z-6582-C - The above number is the part number for this A-Premium 3.5l valve covers. Please verify it carefully.
- [Specification]: ① Position: Left and Right Side; ② Material: Plastic; ③ Valve Cover Gasket Included: Yes; ④ Valve Cover Bolt Included: Yes; ⑤ Sensor Port Included: Yes; ⑥ Spark Plug Seals Included: Yes ( As Picture --- All accessories are pre-assembled into the valve cover to make it more convenient for you to replace car parts )
- [Professional Replacement]: This valve cover set (aka: "rocker cover" or "camshaft cover" or "rocker arm cover" ) made of durable material is the best professional solution for ford 3.5l/3.7l duratec ti-vct engine problems and may help you resolve those problems: ① oil leaks (in the cover bottom or ignition coil hole) ② engine bay smoking ③ burning oil smell ④ misfiring engine ⑤ warning lights on the dashboard !!!!
- [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on A-Premium for F-150 valve cover kit. We offer a wide variety of valve cover kit or engine cover kit, ensuring that you can hit the road with peace of mind.
What to compare before choosing
Once you have two actual vehicle options, compare them in the same application rather than relying on engine labels alone:
- Availability: Confirm that each engine was offered for the model year, trim, and configuration you are considering.
- Output and fuel: Check manufacturer ratings and any stated test-fuel conditions, plus the required fuel for each exact vehicle.
- Efficiency and capability: Compare EPA fuel economy, towing ratings, and payload for matching body styles and drivetrains.
- Ownership evidence: Look for the applicable maintenance schedule, warranty terms, and documented repair-cost or reliability evidence. Do not treat the absence of turbochargers as proof of fewer failures.
- Your use: Decide whether your priority is everyday driving, towing, payload, fuel economy, or a particular power-delivery feel.
A 2020 Transit manual includes a 3.5-liter Duratec specification section, but that vehicle-specific reference does not establish that the Transit is the application intended by a broad comparison of Ford engines. 2020 Ford Transit owner’s manual
Quick Recap
Best Value
- THIS IS BRAND NEW: DNJ® Piston Set Oversize .020 in. (.50mm)
- FITS: 2011-2019 Ford Edge, Explorer, F-150 3.5L V6 24V DOHC 3496cc
- FITMENT NOTES: 1.2x1.5x2.5; .020" (.50mm)
- DNJ Engine Components is a full line provider of Domestic & Japanese engine parts for cars and trucks.
- We carefully selected DNJ Engine Components as the sole provider. DNJ has a 30+ year track record of quality, experience, and trust. It makes sense for us to carry a brand that would help us earn customer loyalty in the long run
Rank #4
- Model Compatibility: Fits Explorer, Taurus, and Transit vehicles equipped with 3.3L, 3.5L, or 3.7L V6 engines.
- Part Identification: Corresponds to the JL3Z-6L266-A engine timing chain tensioner specification listed in the product title.
- Functional Purpose: Serves as a replacement component to restore standard timing chain tensioner for specified models.
- Engine Application: Designed specifically for use with 3.3L, 3.5L, and 3.7L V6 engine configurations in listed vehicles.
- Vehicle Scope: Intended for installation on Explorer, Taurus, and Transit models requiring this specific tensioner part.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
