2007 Subaru Outback cruise control problems
moderate 10 complaints filed with NHTSA · avg repair $600 · see cruise control across all vehicles →
The failure pattern owners describe
Buyer takeaway: 2007 Subaru Outbacks have recurring problems with throttle and speed sensor failures that can disable cruise control, cause unintended acceleration or deceleration, and create sudden loss of power at highway speeds—potentially dangerous scenarios. Many owners report dealer repairs don't permanently fix the issues, and Subaru has not issued recalls or TSBs to resolve them.
Owners describe multiple interconnected failures affecting cruise control, throttle response, and vehicle speed sensing on 2007 Subaru Outbacks. The most serious complaint involves sudden unintended acceleration and downshifting: one owner reported the transmission automatically dropping into first gear at 60-65 mph on the highway, producing a hard braking feel. This was traced to a failing front vehicle speed sensor (P0720) that the owner temporarily disabled by cutting its wire after the dealer could not schedule a timely replacement.
More common are intermittent throttle and throttle position sensor failures (P2138 code) causing unresponsive accelerator pedal, limp mode activation, and sudden deceleration from 75 mph to 20 mph. Owners report that even after sensor replacement, the problem recurs within months. One owner had the throttle sensor replaced, drove trouble-free for 11 months, then experienced three failures in one month thereafter. Dealers often cannot reproduce the faults during diagnostic testing because the failures are intermittent. When these sensor faults occur, the check engine light and cruise control warning light activate, disabling cruise control functionality. A separate complaint documents cruise control failing to maintain set speed downhill, accelerating from 60 to 80 mph uncontrolled, though the dealer stated this was normal design. Manual transmission owners report the opposite problem: engine acceleration when releasing the pedal to shift gears, causing unplanned forward lurch. One owner documented engine acceleration without any pedal input, especially when turning or pressing the clutch, affecting the vehicle since week one—the dealer acknowledged finding the same fault in another 2007 but said Subaru only had a fix for 2008 models.
Same Subaru Outback cruise control reports on nearby years: 2005 · 2006
Failure modes owners describe
Vehicle Speed Sensor Malfunction
Front vehicle speed sensor fails intermittently when cold, triggering diagnostic code P0720. The faulty signal causes the transmission to misread vehicle speed, resulting in dangerous automatic downshifts to first gear at highway speeds and uncontrolled braking feel. One owner disconnected the sensor wire as a temporary fix.
When: Intermittent, typically when transmission is cool
Symptoms owners cite: Check engine light and diagnostic code P0720; Automatic downshift to first gear at highway speed (60-65 mph); Sensation of brakes being slammed on; Safety solenoid in shifter cycling on and off; Error resets after driving as sensor warms
Codes mentioned: P0720
Repairs/costs cited: Front vehicle speed sensor replacement required; sensor is hard-wired into 3-sensor harness requiring transmission access to replace
Unintended Engine Acceleration / Idle Control
Engine revs or accelerates without driver input on the gas pedal, occurring mostly when clutch is pressed and turning, but occasionally while in gear. Dealer found same issue in another 2007 model but stated fix was only available for 2008 model year. Multiple attempted repairs (MAF sensor, throttle body, accelerator pedal, power steering pump) did not resolve the condition.
When: From first week of ownership; recurring
Symptoms owners cite: Engine accelerates without foot on gas pedal; Occurs almost every time clutch is pressed and turning; Increased RPM without driver input; Brakes can slow the car but do not prevent acceleration; Happens 2 times while in gear and driving
Repairs/costs cited: Gas/air ratio (MAF) sensor replaced, throttle body replaced, accelerator pedal replaced, power steering pump replaced, idle switch from power steering pump disconnected—none resolved issue
Recalls/TSBs owners mention: Dealer acknowledged same problem found in another 2007 Outback; stated fix available for 2008 but not 2007
Throttle Position Sensor Intermittent Failure (P2138)
Intermittent throttle position sensor signal loss triggers P2138 code, causing unresponsive accelerator pedal, limp mode, and check engine light. Problem recurs even after repair attempts. Sensors read correctly during dealer diagnostics, but failures reoccur. Cruise control light flashes or remains inoperative during failure state.
When: Intermittent, typically at highway speeds (55-60 mph or 75 mph); can occur at any speed
Symptoms owners cite: Check engine light and cruise control light flashing; Unresponsive accelerator pedal; Loss of power / limp mode activation; Sudden deceleration to 20 mph from highway speed; Cruise control disabled during failure state
Codes mentioned: P2138
Repairs/costs cited: Throttle body and accelerator pedal replacement attempted; one owner had throttle sensor replaced one year prior but failure recurred after 11 months
Cruise Control Speed Regulation Failure
Cruise control does not maintain set speed, allowing vehicle to accelerate uncontrolled, particularly downhill. Vehicle accelerated from 60 mph to 80 mph while cruise control was active. Dealer inspected and found no failures, claiming design is normal.
When: At approximately 8,841 miles; occurred while descending a hill
Symptoms owners cite: Vehicle gains speed uncontrollably while cruise control is engaged; Speed increased from 60 mph to 80 mph downhill; Cruise control did not regulate descent
Recalls/TSBs owners mention: Dealer found no failures and stated vehicle was designed in that manner
Engine Idle Runaway and Throttle Unresponsiveness
Throttle ceases to control engine speed when check engine code P2138 is present. In neutral, engine idles at approximately 4,000 RPM, unresponsive to pedal input. Restarting clears the condition temporarily, but check engine light remains and cruise control light flashes for 1-2 days. Problem recurs intermittently.
When: Intermittently, typically at 55-60 mph; three occurrences in one month reported
Symptoms owners cite: Engine idle reaches 4,000 RPM in neutral; Throttle does not control engine speed; Check engine light remains on after restart; Cruise control light flashes for 1-2 days; Restart temporarily resolves condition
Codes mentioned: P2138
Repairs/costs cited: Throttle sensor replaced one year prior; problem recurred after 11 months of normal operation
Acceleration Hesitation in Mid-Range RPM
Engine hesitates during acceleration between 1,500 and 2,800 RPM, occurring during quick acceleration at intersections or rolling stops.
When: During quick acceleration maneuvers
Symptoms owners cite: Hesitation on acceleration between 1,500 and 2,800 RPM; Occurs during quick acceleration at intersections or rolling stops
Unintended Engine Acceleration on Deceleration / Gear Changes (Manual Transmission)
On manual transmission models, engine accelerates rather than decelerates when foot is removed from accelerator pedal to shift gears. Vehicle jumps forward more quickly than driver intended when selecting next gear, creating a safety hazard during gear transitions.
When: During manual gear shifts
Symptoms owners cite: Engine accelerates rather than decelerates when clutch is pressed; Vehicle jumps forward unexpectedly when gear is selected; Unplanned acceleration during gear transitions
Synthesized from 10 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Common questions
How serious is the cruise control problem on the 2007 Subaru Outback?
It's a documented issue but not catastrophic. 10 complaints have been filed. Repairs average $600 and most owners catch it before it causes a breakdown.
At what mileage does the cruise control typically fail?
Across the 8 complaints that reported odometer mileage, most cruise control failures cluster between 8,841 and 145,000 miles, with the median around 100,000. A quarter of owners report trouble before 8,841; a quarter make it past 145,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $600 for cruise control repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to cruise control?
No active recalls currently cover cruise control issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.