2013 Subaru BRZ
  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front 3/4 view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear 3/4 view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front 3/4 view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear 3/4 view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ side view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear view

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ headlight

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ grille

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ fog light

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ logo

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ wheel

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ wheel

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front tire

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ side vent

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ side vent

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ side mirror

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear wheel

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ taillight

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ badge

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear diffuser

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ exhaust tip

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ engine

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ engine

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ engine detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ engine detail

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ interior

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ interior

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ steering wheel

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ interior

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ interior

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front seats

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front seats

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ front seats

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ gauges

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ gauges

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ audio system

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ shifter

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ shifter

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ traction settings

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ emergency brake

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ pedals

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ sill plate

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ door

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear seats

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ rear seats

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ trunk

  • 2013 Subaru BRZ
  • 2013 Subaru BRZ trunk

The Subaru BRZ and Scion FR-S have been struck by a minor gremlin, but the repair is turning into an episode that ends with "Stay Tuned" rather than a definite conclusion. Automotive News reports that a software mapping hiccup can cause the adaptive engine ECU to get out of whack with the engine, which can, in turn, cause rough idling and stalling.

Toyota said the issue does "involve the variable valve timing," but both Subaru and Toyota say the issue is entirely about the software, that the ECU can develop a "handshake issue" with the engine after having an unfavorable "reaction to normal mechanical variations" in a small number of cases.

The two automakers diverge on the remedy, however. After 100 miles of learning the powertrain and the driver's driving style, AN reports that the ECU's mapping is pretty much baked in. If engine operation exceeds the established parameters, at low revs the engine succumbs to uneven idling and stalling as the ECU tries to recalibrate to a new range of tolerances. Toyota has said that if the issue is suffered by a car with less than 100 miles, the ECU should be reflashed, but that cars with more than 100 miles should have their ECUs replaced. Subaru, though, has said that the ECU doesn't need to be replaced no matter the mileage – a reflash is all that's required. It appears that some owners who have had the reflash have suffered the problem again.

We don't have any hard numbers on how many of the coupes are afflicted and how many have been fixed, so it's impossible to know how big or little the issue is. But with the popularity of the twins and the vociferousness of the fans who queued up to buy them, the situation will either be adequately resolved or we'll be hearing a lot more about it soon enough.


I'm reporting this comment as:

Reported comments and users are reviewed by Autoblog staff 24 hours a day, seven days a week to determine whether they violate Community Guideline. Accounts are penalized for Community Guidelines violations and serious or repeated violations can lead to account termination.


    • 1 Second Ago
  • Share This Photo X