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DENSO Auto Parts 3121 Spark Plug Standard


Part Number

08/12/2032 9:55 AM
Sale Price


In Stock (10+)

delivery box

Usually delivered within 2 days

No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

DENSO Auto Parts 3121 Spark Plug Standard

U-Groove design provides better ignitability for increased engine efficiency.

Products specifications

Manufacturer Heat Range


Pre-Gap Size


Ground Electrode Core Material


Seat Type


Center Electrode Tip Material


Ground Electrode Quantity


Ground Configuration


Center Electrode Core Material


Thread Diameter




Ground Electrode Tip Design




Hex Size


Paid for UPS 2nd Day service on Wednesday afternoon... called Autoplicity about lack of shipping info on Thursday AM and was told the system takes 24 hrs to update. On Friday tracking put the shipment in the delivery location at 1:30am. UPS customer service advised they could have refunded shipping cost if I had shipped direct.... not sure how or why I would accomplish the task. UPS advised contacting the shipper to resolve the issue.. really? Product sat in the UPS delivery center until Monday AM and was delivered Monday PM. Product was installed in my tractor Monday evening.... now it has rained every day and I can't cut the field. Question is really, why offer 2 day service at a premium when no one does what they promise... Purchased these bearings at Autoplicity because of the 2 day service..... who dropped the ball? Most on-line retailers shipping options change if and when you are outside guidelines. That wasn't the case here.

Great easy to use and best prices.

Items fit perfectly, delivery was prompt. Very satisfied

Easy site to use!

Good price , easy order, and free shipping so I thought why not give it a try. Just in time for spring oil changes on lawn mower and tractor.


So far been great experience

It was quick, easy, and trouble free

Thank you

First off, I LOVE my new shipments! These guys had everything at super low prices, and the shipping was phenomenally fast. It's all working great, and imm definitely buying from these guys again.

Ordered a sling to store my roof rack. There was an issue with the supplier which was quickly resolved by the Autoplicity staff. Great customer service -- most responsive I've ever seen.<br><br>Best prices around.

Great so far

Great service. Shipped out the day after I ordered it was the cheapest of the competition.


Cheap prices, great quality, and fast delivery. Autoplicity will continue to receive my patronage.

Easy and fast. Order arrived very fast. Thanks.

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