$14.50 in Texas
Texas Vehicle Safety Inspection CostsPeople who live in these counties have to also have an emissions test for GAS powered vehicles - which costs an extra $27.75 in the Dallas and Houston areas. $16.25 in Austin and $14.25 in El Paso.
Dallas/FW Area - Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant
El Paso Area - El Paso,
Houston Area - Brazoria, Fort Bend, Galveston, Harris, Montgomery
Austin Area - Travis, Williamson
My new TT does require an annual inspection in Texas - $14.25 - because its registered weight is over 4,500 lbs. My old trailer actually weighed 4,849 lbs dry, but was listed as design dry weight of 4,495 by the manufacturer - so no inspection required.
This is the TT inspection criteria
Texas Trailer Safety InspectionClass A motorhomes would fall under the bus category. Class C might fall under the bus category, or the pickups/panel trucks over 80" wide category.
All Class A, B and C will require an emissions test if they are gas powered and registered in a county which requires emissions testing.
One reason the OP was having difficulty finding someone to inspect his rig is likely that most folks might consider the state fee 'too little money' for the level of work required to inspect his rig.
The Kwik-Kar near my home can inspect some motor homes, but their overhead doors are only 12'8" high - so many Class A can't fit into the inspection bay to hook up to the emissions testing machine.
Edit - some specific additional information on the TxDPS website for "Unique Vehicles"
##Motor homes and RV’s with a gross weight over 4500 pounds are required to have annual safety inspections. Motor homes in EMISSIONS counties are also required to have the appropriate emissions test performed.
##If the motor home is 1996 or newer and OBDII capable, then your motor home will receive an OBDII test. Not all motor homes in this age category come equipped with OBDII compliant plug-in; therefore, if your motor home or RV is not OBDII ready, it will require the appropriate tailpipe emissions test.
##If the motor home is 1995 or older it requires the ASM emissions test. The ASM equipment in the Dallas and Houston areas have an 8500 pound limitation. Therefore, if your motor home exceeds this weight limitation, it will be switched to the TSI testing mode.
##It is recommended that you make contact with the station prior to arrival to ensure their equipment can accommodate your vehicle. Vehicles too large for standard inspection bays need not be inspected within the inspection building if the analyzer is housed close enough to the bay opening. The analyzers come with a 20 foot lead; and this will determine whether or not a station can roll their machinery outside the bay to conduct this type of inspection.
FYI OBDII is "On Board Diagnostics-Second Generation (OBDII) is a computerized system on 1996 and newer model year vehicles that monitors emissions-related components and systems for proper functionality."
Basically if the Check Engine light is on - automatic fail. If it has been on in the most recent 20 starts - likely fail.