Denso 234-4070 Oxygen Sensor - Downstream, Upstream, Upstream Left or Upstream Right
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4070 Oxygen Sensor - Downstream, Upstream, Upstream Left or Upstream Right

Brand Denso 234-4070
Position Downstream
Connector Gender Male
Mounting Type Threaded
Sensor Type Heated
Thread Diameter 0.708
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 23.82
Product line OE Style
Fits Ford, Mazda, and Mercury · 186 vehicles

OE style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Helps maintain accurate emissions control and engine performance.

Threaded mounting. Installs with a secure, specific-fit connection.

Cross-references ACDelco 213-1317, ACDelco 213-1367 and ACDelco 213-1408 for the same application. See all 77.

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OE Style Oxygen Sensor for Ford and Mazda

This Denso OE Style oxygen sensor is built for direct replacement on a wide range of Ford Ranger, Explorer, F-150, F-250, F-350, and Mazda B-Series applications. Part number 234-4070 is a specific-fit, heated sensor designed to match the original mounting and connector style for a cleaner repair.

Key Features

  • Heated oxygen sensor with specific fitment for direct replacement
  • OE Style design for factory-like fit and function
  • 4-wire configuration with male connector
  • Threaded mounting with 0.708 in. thread diameter
  • 23.82 in. wiring harness length for listed applications
  • Built to strict OE standards for replacement accuracy
  • Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso 234-4070 is an OE Style oxygen sensor engineered for downstream and upstream applications across select Ford and Mazda vehicles. It is a heated, threaded sensor with a 4-wire layout and a male connector, making it a direct replacement for many factory configurations. This part number 234-4070 is commonly used on Ford Ranger, Ford Explorer, and Mazda B3000/B4000/B2300 applications where exact fit and proper signal response matter.

Denso manufactures this sensor to OE-level standards and tests each unit for replacement accuracy and first-time fit. The protective aluminum oxide trap layer is intended to help shield the sensing element from contamination that can affect engine performance and fuel economy. This part cross-references Bosch 15716 and NTK 22500 for the same application.

What This Sensor Helps Address

  • Check engine light caused by a failing oxygen sensor
  • Incorrect air-fuel mixture readings
  • Reduced fuel economy from slow sensor response
  • Rough idle or drivability issues tied to exhaust feedback
  • Emissions test failures related to sensor performance

Installation Notes and Fitment

Fits 2004-2011 Ford Ranger, downstream.

Fits 2004-2010 Mazda B2300, downstream.

Fits 2004-2006 Mazda B3000, downstream.

Fits 2004-2006 Mazda B4000, downstream.

Fits 2001-2003 Ford Ranger, downstream.

Fits 2001-2003 Mazda B3000, downstream.

Fits 2001-2003 Mazda B4000, downstream.

Fits 1995-2001 Ford Ranger, downstream.

Fits 1998-2001 Mazda B2500, downstream.

Fits 1996-2000 Ford Explorer, downstream.

Fits 1995-2000 Mazda B3000, downstream.

Fits 1995-2000 Mazda B4000, downstream.

Fits 1998 Ford Explorer, upstream left.

Fits 1998 Mercury Mountaineer, upstream left.

Fits 1996-1997 Ford Aerostar, downstream.

Fits 1997 Ford Explorer, upstream.

Fits 1992-1994 Ford Explorer, upstream.

Fits 1997 Ford F-250 HD, downstream.

Fits 1997 Ford F-250 HD, upstream right.

Fits 1996-1997 Ford F-350, downstream.

Fits 1996-1997 Ford F-350, upstream right.

Fits 1996 Ford Bronco, downstream.

Fits 1996 Ford E-150 Econoline, downstream.

Fits 1996 Ford E-150 Econoline Club Wagon, downstream.

Fits 1996 Ford E-250 Econoline, downstream.

Fits 1996 Ford E-350 Econoline, downstream.

Fits 1996 Ford E-350 Econoline Club Wagon, downstream.

Fits 1996 Ford F-150, downstream.

Fits 1996 Ford F-250, downstream.

Fits 1996 Ford F-250, upstream right.

Fits 1996 Ford F-250, upstream.

Fits 1993-1994 Ford F-250, upstream.

Fits 1996 Ford F-350, upstream.

Fits 1992-1995 Ford Aerostar, upstream.

Fits 1995 Ford E-350 Econoline, upstream.

Fits 1995 Ford E-350 Econoline Club Wagon, upstream.

Fits 1991-1995 Ford F-150, upstream.

Fits 1995 Ford F-150, upstream.

Fits 1991-1995 Ford F-250, upstream.

Fits 1995 Ford F-250, upstream.

Fits 1990-1995 Ford F-350, upstream.

Fits 1991-1994 Ford E-250 Econoline, upstream.

Fits 1991-1994 Ford E-350 Econoline, upstream.

Fits 1991-1994 Ford E-350 Econoline Club Wagon, upstream.

Fits 1991-1994 Ford Ranger, upstream.

Fits 1994 Mazda B3000, upstream.

Fits 1994 Mazda B4000, upstream.

Fits 1991-1994 Mazda Navajo, upstream.

Fits 1992-1993 Ford Escort, upstream.

Fits 1992-1993 Mercury Tracer, upstream.

Fits 1991-1992 Ford Bronco, upstream.

Fits 1991-1992 Ford E-350 Econoline, upstream.

Fits 1991-1992 Ford E-350 Econoline Club Wagon, upstream.

Fits 1991-1992 Ford F-250, upstream.

Fits 1991-1992 Ford F-350, upstream.

Fits 1990-1992 Ford Ranger, upstream.

Fits 1990-1991 Ford Aerostar, upstream.

Fits 1991 Ford E-250 Econoline Club Wagon, upstream.

Fits 1990-1991 Ford Ranger, upstream.

Fits 1990 Ford Bronco, upstream.

Fits 1990 Ford E-150 Econoline, upstream.

Fits 1990 Ford E-150 Econoline Club Wagon, upstream.

Fits 1990 Ford E-250 Econoline, upstream.

Fits 1990 Ford E-250 Econoline Club Wagon, upstream.

Fits 1990 Ford E-350 Econoline, upstream.

Fits 1990 Ford E-350 Econoline Club Wagon, upstream.

Fits 1990 Ford F-150, upstream.

Fits 1990 Ford F-250, upstream.

Before ordering, verify the position, connector style, and sensor length against the original unit. This Denso oxygen sensor is a direct-fit replacement for listed Ford and Mazda applications, including multiple Ranger and Explorer configurations.

Quality Assurance

Denso builds this OE Style sensor to strict original-equipment standards and tests it for exact replacement fitment. The design focuses on accurate signal performance, contamination resistance, and long service life in demanding exhaust environments.

Related reading

This part fits 186 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2011FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2010FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2010MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2009FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2009MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2008FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2008MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2007FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2007MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2006FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2006MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2006MazdaB3000—Downstreamw/ 24" Downstream Sensor; OE Style
2006MazdaB4000—Downstreamw/ 24" Downstream Sensor; OE Style
2005FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2005MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2005MazdaB3000—Downstreamw/ 24" Downstream Sensor; OE Style
2005MazdaB4000—Downstreamw/ 24" Downstream Sensor; OE Style
2004FordRanger—Downstreamw/ 24" Downstream Sensor; OE Style
2004MazdaB2300—Downstreamw/ 24" Downstream Sensor; OE Style
2004MazdaB3000—Downstreamw/ 24" Downstream Sensor; OE Style
2004MazdaB4000—Downstreamw/ 24" Downstream Sensor; OE Style
2003FordRanger—Downstreamw/ 22" Downstream Sensor; OE Style
2003FordRanger—Downstreamw/ 21" Downstream Sensor; OE Style
2003MazdaB3000—Downstreamw/ 21" Downstream Sensor; OE Style
2003MazdaB4000—Downstreamw/ 22" Downstream Sensor; OE Style
2002FordRanger—Downstreamw/ 22" Downstream Sensor; OE Style
2002FordRanger—Downstreamw/ 21" Downstream Sensor; OE Style
2002MazdaB3000—Downstreamw/ 21" Downstream Sensor; OE Style
2002MazdaB4000—Downstreamw/ 22" Downstream Sensor; OE Style
2001FordRanger—Downstreamw/ 22" Downstream Sensor; OE Style
2001FordRanger—Downstreamw/ 21" Downstream Sensor; OE Style
2001FordRanger—DownstreamOE Style
2001MazdaB2500—DownstreamOE Style
2001MazdaB3000—Downstreamw/ 21" Downstream Sensor; OE Style
2001MazdaB4000—Downstreamw/ 22" Downstream Sensor; OE Style
2000FordExplorer—DownstreamOE Style
2000FordRanger—DownstreamOE Style
2000MazdaB2500—DownstreamOE Style
2000MazdaB3000—DownstreamOE Style
2000MazdaB4000—DownstreamOE Style
1999FordExplorer—DownstreamOE Style
1999FordRanger—DownstreamOE Style
1999MazdaB2500—DownstreamOE Style
1999MazdaB3000—DownstreamOE Style
1999MazdaB4000—DownstreamOE Style
1998FordExplorer—DownstreamOE Style
1998FordExplorer—Upstream LeftOE Style
1998FordRanger—DownstreamOE Style
1998MazdaB2500—DownstreamOE Style
1998MazdaB3000—DownstreamOE Style
1998MazdaB4000—DownstreamOE Style
1998MercuryMountaineer—Upstream LeftOE Style
1997FordAerostar—DownstreamOE Style
1997FordExplorer—DownstreamOE Style
1997FordExplorer—UpstreamOE Style
1997FordF-250 HD—DownstreamCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1997FordF-250 HDAutomaticUpstream RightCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1997FordF-250 HD—DownstreamOE Style
1997FordF-350—DownstreamCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1997FordF-350AutomaticUpstream RightCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1997FordF-350—DownstreamOE Style
1997FordRanger—DownstreamOE Style
1997MazdaB3000—DownstreamOE Style
1997MazdaB4000—DownstreamOE Style
1996FordAerostar—DownstreamOE Style
1996FordBronco—DownstreamOE Style
1996FordE-150 Econoline—DownstreamOE Style
1996FordE-150 Econoline Club Wagon—DownstreamOE Style
1996FordE-250 Econoline—DownstreamOE Style
1996FordE-350 Econoline—DownstreamOE Style
1996FordE-350 Econoline Club Wagon—DownstreamOE Style
1996FordExplorer—DownstreamOE Style
1996FordF-150—DownstreamOE Style
1996FordF-250—DownstreamCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1996FordF-250AutomaticUpstream RightCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1996FordF-250ManualUpstreamGVW Over 8,500 Lbs.; OE Style
1996FordF-250—DownstreamOE Style
1996FordF-250AutomaticUpstreamGVW Over 8,500 Lbs.; Exc. Calif.; OE Style
1996FordF-350—DownstreamCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1996FordF-350AutomaticUpstream RightCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
1996FordF-350ManualUpstreamOE Style
1996FordF-350—DownstreamOE Style
1996FordF-350AutomaticUpstreamExcluding California.; OE Style
1996FordRanger—DownstreamOE Style
1996MazdaB3000—DownstreamOE Style
1996MazdaB4000—DownstreamOE Style
1995FordAerostar—UpstreamOE #F4UZ-9F472-C; OE Style
1995FordE-350 Econoline—UpstreamExcluding California.; OE Style
1995FordE-350 Econoline Club Wagon—UpstreamExcluding California.; OE Style
1995FordF-150ManualUpstreamOE Style
1995FordF-150AutomaticUpstreamExcluding California.; OE Style
1995FordF-250ManualUpstreamOE Style
1995FordF-250—UpstreamExc. Calif.; GVW Over 8,500 Lb.; OE Style
1995FordF-250—UpstreamOE Style
1995FordF-250—UpstreamExcluding California.; OE Style
1995FordF-350ManualUpstreamOE Style
1995FordF-350—UpstreamOE Style
1995FordF-350—Upstreamw/ 10" Sensor; OE Style
1995FordRanger—DownstreamOE Style
1995MazdaB3000—DownstreamOE Style
1995MazdaB4000—DownstreamOE Style
1994FordAerostar—UpstreamOE #F4UZ-9F472-C; OE Style
1994FordE-250 Econoline—UpstreamGVW Over 8,500 Lbs.; OE Style
1994FordE-350 Econoline—UpstreamOE Style
1994FordE-350 Econoline Club Wagon—UpstreamOE Style
1994FordExplorer—UpstreamOE Style
1994FordF-150—UpstreamOE Style
1994FordF-250—UpstreamGVW Over 8,500 Lbs.; OE Style
1994FordF-250—UpstreamOE Style
1994FordF-350—UpstreamOE Style
1994FordF-350—Upstreamw/ 10" Sensor; OE Style
1994FordRanger—UpstreamOE Style
1994MazdaB3000—UpstreamOE Style
1994MazdaB4000—UpstreamOE Style
1994MazdaNavajo—UpstreamOE Style
1993FordAerostar—UpstreamOE #F4UZ-9F472-C; OE Style
1993FordE-250 Econoline—UpstreamGVW Over 8,500 Lbs.; OE Style
1993FordE-350 Econoline—UpstreamOE Style
1993FordE-350 Econoline Club Wagon—UpstreamOE Style
1993FordEscort—UpstreamOE Style
1993FordExplorer—UpstreamOE Style
1993FordF-150—UpstreamOE Style
1993FordF-250—UpstreamOE Style
1993FordF-250—UpstreamGVW Over 8,500 Lbs.; OE Style
1993FordF-350—UpstreamOE Style
1993FordF-350—Upstreamw/ 10" Sensor; OE Style
1993FordRanger—UpstreamOE Style
1993MazdaNavajo—UpstreamOE Style
1993MercuryTracer—UpstreamOE Style
1992FordAerostar—UpstreamOE #F4UZ-9F472-C; OE Style
1992FordBronco—UpstreamOE Style
1992FordE-250 Econoline—UpstreamGVW Over 8,500 Lbs.; OE Style
1992FordE-350 Econoline—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1992FordE-350 Econoline—UpstreamOE Style
1992FordE-350 Econoline Club Wagon—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1992FordE-350 Econoline Club Wagon—UpstreamOE Style
1992FordEscort—UpstreamOE Style
1992FordExplorer—UpstreamOE Style
1992FordF-150—UpstreamOE Style
1992FordF-250—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1992FordF-250—UpstreamGVW Over 8,500 Lbs.; OE #F4UZ9F472C; OE Style
1992FordF-250—UpstreamOE Style
1992FordF-350—Upstream4 Lead Sensor, OE #F4UZ9F472C; OE Style
1992FordF-350—UpstreamOE #F4UZ9F472C; OE Style
1992FordF-350—Upstreamw/ 10" Sensor; OE Style
1992FordRanger—UpstreamOE Style
1992FordRanger—Upstream4 Lead Sensor; OE #FOUZ9F472C & F4UZ9F472C; OE Style
1992MazdaNavajo—UpstreamOE Style
1992MercuryTracer—UpstreamOE Style
1991FordAerostar—UpstreamOE #FOUZ9F472C & F4UZ9F472C; OE Style
1991FordBronco—UpstreamOE Style
1991FordE-250 Econoline—UpstreamGVW Over 8,500 Lbs.; OE Style
1991FordE-250 Econoline Club Wagon—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1991FordE-250 Econoline Club Wagon—UpstreamGVW Over 8,500 Lbs.; OE Style
1991FordE-350 Econoline—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1991FordE-350 Econoline—UpstreamOE Style
1991FordE-350 Econoline Club Wagon—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1991FordE-350 Econoline Club Wagon—UpstreamOE Style
1991FordF-150—UpstreamOE Style
1991FordF-250—Upstream4 Lead Sensor; OE #F4UZ9F472C; OE Style
1991FordF-250—UpstreamGVW Over 8,500 Lbs.; OE #F4UZ9F472C; OE Style
1991FordF-250—UpstreamOE Style
1991FordF-350—Upstream4 Lead Sensor, OE #F4UZ9F472C; OE Style
1991FordF-350—UpstreamOE #F4UZ9F472C; OE Style
1991FordF-350—Upstreamw/ 10" Sensor; OE Style
1991FordRanger—UpstreamOE #F4UZ-9F472-C; OE Style
1991FordRanger—UpstreamOE Style
1991FordRanger—Upstream4 Lead Sensor; OE #FOUZ9F472C & F4UZ9F472C; OE Style
1991MazdaNavajo—UpstreamOE Style
1990FordAerostar—UpstreamOE #FOUZ9F472C & F4UZ9F472C; OE Style
1990FordBronco—Upstreamw/ 10" Sensor; OE Style
1990FordE-150 Econoline—UpstreamOE Style
1990FordE-150 Econoline—Upstreamw/ 11" Sensor; OE Style
1990FordE-150 Econoline Club Wagon—UpstreamOE Style
1990FordE-150 Econoline Club Wagon—Upstreamw/ 11" Sensor; OE Style
1990FordE-250 Econoline—UpstreamGVW Under 8,500 Lbs.; OE Style
1990FordE-250 Econoline—Upstreamw/ 11" Sensor; OE Style
1990FordE-250 Econoline Club Wagon—UpstreamGVW Under 8,500 Lbs.; OE Style
1990FordE-250 Econoline Club Wagon—Upstreamw/ 11" Sensor; OE Style
1990FordE-350 Econoline—Upstreamw/ 11" Sensor; OE Style
1990FordE-350 Econoline Club Wagon—Upstreamw/ 11" Sensor; OE Style
1990FordF-150—Upstreamw/ 10" Sensor; OE Style
1990FordF-250—Upstreamw/ 10" Sensor; OE Style
1990FordF-350—Upstreamw/ 10" Sensor; OE Style
1990FordRanger—UpstreamOE #F4UZ-9F472-C; OE Style
1990FordRanger—Upstream4 Lead Sensor; OE #FOUZ9F472C & F4UZ9F472C; OE Style
Directly replaces or cross-references 77 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-1317ACDelco — 213-1367ACDelco — 213-1408ACDelco — 213-1459BorgWarner — OS121BorgWarner — OS123BorgWarner — OS136BorgWarner — OS163BorgWarner — OS219BorgWarner — OS853BorgWarner — OS946BorgWarner — OS1957BorgWarner — OS2000Bosch — 15716Bosch — 15718Bosch — 15719Delphi — ES20014Delphi — ES20039Delphi — ES20064Delphi — ES20316Ford — F2AZ9F472CFord — F3UZ9F472CFord — F4UZ9F472CFord — F7TZ9G444CAFord — F8TZ9G444CAFord — F39Z9F472CFord — F47Z9F472CFord — F68Z9F472CAFord — F75Z9G444CAFord — F78Z9F472EAFord — F85Z9G444CAFord — F85Z9G444DAFord — F88Z9F472CAFord — F88Z9F472EAFord — FO9Z9F472AFord — FOUZ9F472CMazda — ZZM218861Mazda — ZZM218861AMazda — ZZM418861Mazda — ZZM718860Mazda — ZZM718861Mazda — ZZM818861Mazda — ZZN118860Mazda — ZZP218861Mazda — ZZP318861Motorcraft — DY618Motorcraft — DY638Motorcraft — DY643Motorcraft — DY659Motorcraft — DY706Motorcraft — DY711Motorcraft — DY713Motorcraft — DY729Motorcraft — DY733Motorcraft — DY804Motorcraft — DY843Motorcraft — DY862Motorcraft — DY1092Motorcraft — DY1094Motorcraft — DY1095NTK — 22500NTK — 22501NTK — 22503Standard Ignition — SG144Standard Ignition — SG492Standard Ignition — SG493Standard Ignition — SG1800Standard Ignition — SG1807Standard Ignition — SG1810Standard Ignition — SG1812Standard Ignition — SG1866Walker Products — 250-24001Walker Products — 250-24070Walker Products — 250-24127Walker Products — 350-34089Walker Products — 350-34414Walker Products — 350-34602