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Lexus · Known Issues

2007 Lexus GX Problems: 2 Known Issues

2007 model year · 3,100+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 3,100+ owner reports, the 2007 Lexus GX has 2 documented known issues. None of the listed issues is rated critical; this is not a complete reliability assessment. The most commonly reported issue is Secondary Air Injection Pump Failure with 2,200 owner reports. Across all issues with published estimates, repair costs range from $400 to $2,000. DIY maintenance guides at au7o.io.

In This Article

  • GX Emissions1
  • GX Drivetrain1
  • Recalls1
  • FAQ
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In This Article

  • Emissions1
  • Drivetrain1
  • Recalls1
  • FAQ

All 2 Known Issues

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Community reported
2,200 owners

On the 2003-2009 Lexus GX 4.7L 2UZ-FE, the secondary air injection (SAI) system pump and switching valves fail due to moisture intrusion and corrosion. The SAI pump introduces fresh air into the exhaust during cold starts to reduce emissions, but the pump motor corrodes internally and the switching valves stick. This triggers a check engine light with SAI-related codes.

This issue also affects: Toyota 4Runner, Toyota Tacoma, Toyota FJ Cruiser

Common Symptoms

  • Check engine light with P2440/P2441/P2442 codes
  • Rough idle on cold start
  • Failed emissions inspection
  • Whirring noise from passenger side of engine on cold start

How to Fix

Replace the secondary air injection pump and switching valves. Clean or replace the air injection check valves. Clear codes and verify operation. Some owners in non-emissions-testing states choose to bypass the system entirely with a tune.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • 17600-0F010 genuine Lexus secondary-air injection pump
    OEM17600-0F010

    Replace a commanded-test-confirmed failed secondary-air pump Fitment/availability: Live page explicitly fits 2004-2009 GX470 2UZ-FE/UZJ120. It does not verify the issue's 2003 year.

    LexusPartsNow
  • 25710-50022 genuine Lexus secondary-air switching/diverter valve
    OEM25710-50022

    Replace the diagnosed failed main air-switching/diverter valve Fitment/availability: Live page explicitly fits 2004-2009 GX470 2UZ-FE and supersedes 25710-50020/21.

    LexusPartsNow

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • TipReplace both the pump AND the switching valves at the same time — if one has failed, the other is likely close behind. The valves are $150 each but save a second repair.
Typical repair cost:$800 - $2,000

Research This Issue

Based on 2,200 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence2,200 owner reportsLast reported by owners Aug 2025Reviewed Mar 2026
Community reported
900 owners

On the 2003-2009 Lexus GX 4.7L 2UZ-FE, the center differential lock actuator on the GX470 fails due to internal motor wear and electrical contact corrosion. When the actuator fails, the center diff lock cannot be engaged for low-range off-road use. The actuator is mounted on the transfer case and is exposed to road debris and moisture.

This issue also affects: Lexus LX, Toyota Land Cruiser, Toyota Sequoia

Common Symptoms

  • Center diff lock indicator flashes but does not engage
  • Center diff lock switch has no effect
  • Clicking sound from transfer case when trying to engage
  • AWD warning light on dashboard

How to Fix

Replace the center differential lock actuator motor. The actuator is accessible from under the vehicle on the transfer case. Use the OEM Toyota actuator for reliability. After replacement, verify engagement by testing in a straight line at low speed on a loose surface.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • 36410-60083 genuine Lexus transfer-shift actuator assembly
    OEM36410-60083

    Replace a diagnosed failed complete transfer-case shift/center-lock actuator Fitment/availability: Live page explicitly fits 2003-2009 GX470 2UZ-FE/UZJ120 and supersedes 36410-60080. Confirm VIN and transfer-case configuration.

    LexusPartsNow

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • TipExercise the center diff lock monthly by engaging and disengaging it for 30 seconds. This prevents internal corrosion from seizing the actuator motor contacts.
Typical repair cost:$400 - $1,000

Research This Issue

Based on 900 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence900 owner reportsLast reported by owners Jun 2025Reviewed Mar 2026
NHTSA Recalls1 recall

EQUIPMENT:OTHER:LABELS

TOYOTA IS RECALLING CERTAIN MODEL YEAR 2006 THROUGH 2009 SIENNA AND 2009 LEXUS GX PASSENGER VEHICLES. THE VEHICLE CAPACITY WEIGHT ON THE TIRE AND LOADING INFORMATION LABEL AND THE GVWR ON THE CERTIFICATION LABEL IS INSUFFICIENT FOR CERTAIN VEHICLES. SOME VEHICLES WERE ACCESSORIZED THROUGH VEHICLE PROCESSING CENTERS AND HAD ACCESSORIES INSTALLED THAT CAUSED THE VEHICLE TO EXCEED THE GVWR VALUE. THESE VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO 110, "TIRE SELECTION AND RIMS," AND 49 CFR PART 567.

Campaign #09V23400025/06/2009

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Other Lexus Models

Lexus NX18Lexus ES16Lexus GS15Lexus RX14Lexus UX13Lexus IS12

Frequently Asked Questions

What are the most common Lexus GX problems?

According to Au7o's analysis of 3,100+ owner reports, the 2007 Lexus GX has 2 documented issues. The most frequently reported are: Secondary Air Injection Pump Failure, Center Differential Lock Actuator Failure. None are rated critical, but regular maintenance is recommended.

Is the Lexus GX reliable?

The 2007 Lexus GX has 2 known issues documented across 3,100+ owner reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Lexus GX problems?

Repair costs for known Lexus GX issues range from $400 to $2,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2003-2009 Lexus GX Secondary Air Injection Pump Failure?

The secondary air injection (SAI) system pump and switching valves fail due to moisture intrusion and corrosion. The SAI pump introduces fresh air into the exhaust during cold starts to reduce emissions, but the pump motor corrodes internally and the switching valves stick. This… Repairs typically run $800-$2,000. Severity: medium.

What is the 2003-2009 Lexus GX Center Differential Lock Actuator Failure?

The center differential lock actuator on the GX470 fails due to internal motor wear and electrical contact corrosion. When the actuator fails, the center diff lock cannot be engaged for low-range off-road use. The actuator is mounted on the transfer case and is exposed to road de… Repairs typically run $400-$1,000. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 3,100+ owner reports, NHTSA recalls, TSBs, and automotive forums.