Diverter Valve
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Diverter Valve Diverter Valve
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CARQUEST by BWD Diverter Valve

Part No. EC1176 Warranty Details  

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CARQUEST by BWD is an aftermarket leader, providing a premium line of engine management products. BWD manufactures and distributes high technology critical components for late model domestic and import vehicles. BWD is constantly evolving to give customers the competitive edge they need to compete in today’s ever-changing marketplace.

Product Features:
  • End of the line testing ensures quality in every box
  • Manufactured with the highest grade materials for prolonged life and superior performance
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Hose Connector Quantity:5
Hose Size:1/4, 1 in


by PowerReviews
CARQUEST by BWDDiverter Valve

(based on 1 review)

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Reviewed by 1 customer

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(3 of 7 customers found this review helpful)


Perfect fit / replacement. OEM Quality


from Perris, CA

Verified Buyer
Helpful Reviewer


  • Durable


    Best Uses

      Comments about CARQUEST by BWD Diverter Valve:

      Easy to find the right part online.Easy to place the order. Fast confirmation and quick shipment.
      Great price. What's not to like?

      • Was this a gift?:
      • No

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      3 Questions | 3 Answers
      Displaying questions 1-3
      • Q:

        Where is this part located? ive looked on top and under the entire engine bay looking for a part that looks like the bwd diverter valve. only thing that appears to be the same is a 3 port. two rubber lines and one vacuum line.
        Asked on 6/12/2014 by Joe

        1 answer



          Hi Joe, glad to serve you! To further assist with the diverter valve, please provide us the year, make, model and engine size of your vehicle.

          Answered on 6/13/2014 by Steve from AAP
      • Q:

        can this diverter ec1176 be used on a 1991 f150 super cab with a5.0 v8 4x4
        Asked on 10/13/2013 by ralph

        1 answer



          Hi Ralph, unfortunately this BWD Diverter Valve - part# EC1176 is not an ideal part for your 1991 Ford F-150 Pickup Super Cab. Right now we are unable to locate an exact diverter valve for your vehicle online. However, if you could please visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you.

          Answered on 10/13/2013 by Vincent from AAP
      • Q:

        if this is bad how would it make your motor run. like idle up hige or motor to run really bad ? can you clean it out with a degreaser ?
        Asked on 10/22/2012 by larry from ragland , al

        1 answer



          With reference to this BWD Air Management (Diverter) Valve - part# EC1176, the TAD (thermactor air diverter) valve is the one that is sort of behind the intake near the firewall. The TAB (thermactor air bypass) valve is the one between the engine and heater box. That TAD valve is there to either direct fresh air (from air pump via TAB valve) upstream of the O2 sensor and first cat converter or downstream of the O2 sensor and first cat converter. This valve is only used to help warm up the first cat converter to help it function better when the engine is started cold. Once the engine warms up and goes into closed loop operation (computer starts monitoring the O2 sensor) the TAD valve should now direct the fresh air from air pump downstream of the O2 sensor and first cat converter directly into the exhaust pipe just upstream of the second cat converter. The way the TAD directs the fresh air is via engine vacuum and a vacuum solenoid. For function, with warm engine, pull the vacuum line (it should be the yellow line) off the TAD valve behind the intake and see if you feel any suction on the line. Your symptoms of excessive rich running could be indicative of the TAD valve directing fresh air into the exhaust system upstream of the O2 sensor thus causing the computer to mistakenly think the mixture is very lean and hence trying to richen it. If you feel vacuum on the yellow vacuum line that goes to the TAD valve with a warmed up engine, then you should work your way back to the solenoid on the other end of this yellow vacuum line and do the requisite testing. If the solenoid checks out ok, you need to figure out why the computer is energizing this solenoid and routing vacuum to the TAD valve and sending fresh air upstream of the O2 sensor. In testing the diverter valve all you really want to determine is that it is directing air pump air to the proper ports based on vacuum application. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

          Answered on 10/23/2012 by Vincent from AAP
      Displaying questions 1-3

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