I personally avoid RockAuto, at all costs...Larry can't navigate the site to find correct item & part #.
- I was Credit Card frauded 2x, in my life // one card in my name went to TX, and $14,500 was spent quick >>> You remember me now SD
- I got police involved re Identify Theft, and we dealt with Collections BS...for 2 years straight
- I finally screwed with them large and got a rep. fired // and started dragging the manager into it...Larry had acquired his private work #, so they finally gave up
- I only give out my Visa, over the phone
- and RockAuto has no reps to talk to and verify correct part #'s or not
- brother uses it, sometimes
Sorry you had bad experience with RA, but I use only PayPal payments and have never had any problems.
First I go to OEM sites to verify part numbers and get reference (dealer) list prices by entering vehicle VIN into databases.
For Ford I go to Ford OEM Parts Site or Varsity Ford: https://parts.ford.com/shop/en/us/shop-parts https://www.varsityfordparts.com/
For Honda I use HondaPartsNow: https://www.hondapartsnow.com/
I subscribe to Mitchell Online shop manuals for all my vehicles in use, because they have excellent diagrams, troubleshooting procedures- but no OEM part #'s. You can print diagrams and procedures for use in garage.
After getting OEM part number and reference price, then I head to Rock Auto to enter part number or look at database for vehicle in categories setup.
Then comparison to aftermarket and OEM, also sold on Rock Auto can be made. Also, some aftermarket parts are not shown on catalog for vehicle due to price agreements (Dorman primary cat conv. for instance- only found with OEM part # search)
Rock Auto has mainly engine and mechanical components but few trim & body pieces, which I still get from OEM sites or off eBay if price difference is big.
Many trim pieces on eBay are pulls from salvaged/junked vehicles and work fine vs. OEM new, in most cases, for refurbing older vechicles. OEM p/n's are essential for buying correct item on eBay.
RockAuto shipping is a bit high for Fedex ground for small order so best to order batch of parts to distribute costs. I've also had expedited items sent by DHL, on occasion.
Price comparison example for 2003 Honda Civic Hybrid 1.3L 4L
OEM Catalytic Converter/Exhaust Manifold (bare)
$1400 Honda Parts Now
OEM Secondary Cat NOx Converter $1292
OEM Air/Fuel rato Sensor #1 - $328
OEM Oxygen Sensors #2 & 3 - $674
Dorman Primary Cat Converter Kit (w/ hardware and Exh manifold gasket)- $310 Rock Auto (same Dorman item O'Reilly Auto - $453)
Walker Secondary Cat NOx Converter - $156
NTK Air/Fuel rato Sensor #1 - $131
NTK Oxygen Sensors #2 & 3 - $90
I will purchase OEM if price difference is not substantial and for certain crital parts. Some sensors I will only get OEM, like the MAP sensor on my 2006 Escape, as this is a crucial part for determining engine running performance via the PCM (computer). Same goes for fuel injectors, spark plug coils, spark plugs- always get OEM Motorcraft or Honda.
Example for 2006 Escape 2.3L L4 EGR Valve:
Ford OEM List $116, FordParts OEM $76 RockAuto OEM $63 A/M $40
In this case- purchased Motocraft OEM Ford Parts because had free Fedex shipping over $75 orders. Unfortunately, Ford Parts stopped accepting PayPal earlier this year.
Also A/C condensors, I buy OEM because they have same stone resistant construction & flow type/volume to keep charge amounts same as original. Many aftermarket condensers are flimsy and don't take stone impacts well.