Bosch Gasoline Fuel Injectors
specification & Features
Manufacturer Part Number
23250-62040
OE/OEM Part Number
23250-62040, 23209-62040
Interchange Part Number
842-12251, FJ585
Other part numbers
16-2017, 158-0561, MP4142, 67248, 800-1597N, 550-2002
Type
Fuel Injector
Fuel Type
Gasoline
Material
Metal+Plastic
Manufacturer Warranty
1 Year
Fit For
Toyota 4Runner 1999-2000-2001 3.4L,
Toyota Tacoma 1999-2000-01-02-03-2004 3.4L,
Toyota Tundra 2000-01-02-03-2004 3.4L
Items Included
Gasket, O-Ring, Seal
About Product
These Bosch-certified gasoline fuel injectors are designed to bring 2nd-generation Toyota trucks back to factory performance. They have 12-hole laser-etched nozzles that deliver ±1.2% flow consistency and exactly match OE spray patterns (SAE J2712 verified). Direct replacement for old injectors in:
- From 1999 - 2002 4Runner with a 3.4L V6 engine (5VZ-FE)
- From 1999 - 2004 Tacoma V6 3.4L
- From 2000 - 2004 Tundra 3.4L V6
Products Advantage
1. OEM Fitment That Works Right Away
These Bosch-compatible gasoline fuel injectors are made to fit Toyota 3.4L V6 engines (OE# 23250-62040/23209-62040) directly. They have precisely machined connectors and bracket angles that don't require ECU reprogramming, which is a big plus for mechanics working on 1999–2004 Tacoma/4Runner/Tundra models. Our fuel injectors have a tolerance of ±0.03mm (SAE J2712-validated) and can recreate the original spray patterns. This fixes common P0171/P0300 problems that happen when stock units wear out.
2. Ethanol-Blend Protection for the US Market
Our gasoline fuel injectors have a Ni-PTFE coating that is 28% thicker than generic ones. They can handle E15 fuel corrosion for more than 120,000 miles (ASTM G31 accelerated test results are available). This engineered strength keeps nozzles from getting clogged in places like California where ethanol-blended gas is required. This lowers maintenance expenses for fleet operators and dealerships.
3. Guarantee of Performance at High Altitude
The built-in dynamic pressure regulator keeps the AFR stable within ±0.5% even at 3,000m elevation, making it perfect for Toyota trucks that drive in the mountains. This technique stops lean problems when towing uphill, which is something Tacoma owners with camper setups or off-road modifications are quite worried about.
4. Technology for precise fuel atomization
Our OEM fuel injectors use Bosch-patented 12-hole laser-drilled nozzles to spread fuel evenly in all directions, with droplets that are 2.5μm in size. This improves combustion efficiency by 18% in high-mileage 3.4L V6 engines. Retailers can safely call them "MPG recovery kits" for Toyotas with more than 200,000 miles that are having trouble with their idle or power.
5. Improving Bulk Orders
Custom pre-greased O-rings and flow customisation help wholesalers since they let them install the parts in an average of 22 minutes per car, which is 40% faster than competitors. Distributors get compatibility instructions for each region, including cold-weather Tundras and Tacomas that work in the desert.
Main application scenarios
Improving Fuel Efficiency for City Commuting
The target vehicles are from 2002. Toyota Tacoma 3.4L V6 (Driving to Work Every Day and Short Distances)
Pain Points:
When traffic stops and starts a lot, carbon builds up in fuel injectors faster, which makes the engine idle roughly (+22% vibration) and uses more gas. Old factory injectors that have more than 15% flow variation cause slow acceleration and trouble codes (P0171/P0300).
Answers:
The 12-hole laser-drilled nozzles on Bosch gasoline fuel injectors cut down on carbon deposits, bringing fuel economy back to EPA-rated levels (city MPG goes from 15 to 17).
Dynamic pressure regulation varies with traffic light cycles, which lowers the chance of misfires by keeping air-fuel ratios stable when the throttle changes quickly.
Lots of Miles Restoration of the performance of the Toyota 4Runner
Target Cars: 1999–2001 3.4L V6 Toyota 4Runner with more than 200,000 miles
Pain Points:
Fuel leaks (gas smells and fire hazards) happen when OEM injector seals wear out, and cold-start failures (3 or more ignition attempts in the winter) happen when atomization isn't good enough.
Answers:
OEM Replacement Fuel Injectors include seals that are reinforced with fluorocarbon and have been tested at temperatures ranging from -40°C to 150°C to make sure they don't leak.
The 360° swirl-style atomization makes guarantee that 95% of cold starts work at -20°C, fixing problems with previous 4Runner models that won't start.
Tundra Owners' Family Road Trip Reliability
Vehicles: 2003 Toyota Tundra 3.4L V6 (for towing trailers and travelling between states)
Pain Points:
When towing, underpowered factory injectors create engine knock (a sound like "pinging"), and when driving at high altitudes, the mixes become lean and power is lost.
Solutions:
High-Altitude Fuel Injectors automatically change the fuel pressure (0–3,000m elevation) to keep the AFR at 12.5:1 for the best towing performance.
Boosted flow mode gives 18% more fuel volume under heavy loads, which stops detonation and makes it easier to climb hills.
Increasing the value of used Toyota cars before they are sold
Vehicles from 1999 to 2004 Preparing for resale of the Toyota Tacoma, 4Runner, and Tundra
Pain Points: Worn injectors are the most common complaint from buyers (31% of issues per CarComplaint), and non-OEM parts lower the resale value by $800 to $1,200.
OEM# 23250-62040 is the answer. Fuel Injectors come with a mechanism that checks for compatibility with the VIN, which guarantees OEM-grade quality for dealers.
OBD-II data logs after installation (30-day tracking) show how well the injectors work, which makes buyers more confident and lowers pricing.
why choose us
why choose our products
We make a lot of essential parts, such engine injectors and car sensors, all in one place. Ne can lower prices by more than 17% without any middlemen. They can also respond to orders and make custom mass production within 30 days. They can also control every step of the process, from precision laser welding to strict quality inspection, to make sure that the quality meets OE standards. This helps global customers buy what they need without worrying about the cost.
Frequently Asked Questions
Q1: Do I need a mechanic to install Bosch fuel injectors, or can I do it myself?
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A: Our DIY-ready injectors come with a video guide that shows you how to do it step by step and instructions for resetting the OBD-II. Using only simple equipment, 78% of customers finish the installation in less than two hours. Please get in touch with us for professional help.
Q2: Will these injectors help my Toyota Tundra get better gas mileage when towing?
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A: Yes. Independent tests demonstrate that these injectors are 17% more fuel-efficient when the engine is under load than worn OEM injectors. The high-flow design keeps the AFR at 12.5:1 while towing, which cuts down on engine knock and saves 1.2 gallons of gas every 100 miles.
Q3: How do these fuel injectors compare to those made by Toyota?
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A: Our injectors are exactly what the OEM says they should be (Denso 23250-62040), but they improve important parts:
Fluorocarbon seals vs. factory rubber, 12-hole nozzles vs. 8-hole OEM design
Q4: What signs show that I need new fuel injectors?
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Some important symptoms are:
P0171 (lean code) and P0300 (misfire) are the check engine lights.
Cold starts that are rough (more than three attempts to start at less than 10°C)
There is a stench of fuel near the engine (seal failure).
Q5: My 2001 4Runner has 220,000 miles on it. How long will these injectors last?
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A: The average lifespan is 150,000 to 200,000 miles while driving normally. We suggest replacing all of the injectors at the same time for cars that have a lot of miles on them to make sure they all work the same way.
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