Costco 21129 Grill Parts

Highest quality replacement parts for your Costco 21129 - Free USA shipping $49 or more* - No Sales Tax*

Costco 21129 owners manual and diagrams

Diagrams & owners manual not available for grill model# 21129. If you have a manual you're willing to share, please click here to send us an email with the attached manual. Thank You!

Replacement BBQ grill parts for Costco model: 21129

On this page you'll find all of the parts that fit model Costco 21129. If the part you're shopping for isn't included below, you might find it using the category buttons on the right side of the page. For example, if your looking for a warming rack and there are none here, click the warming rack button to see all of the racks we have for Costco grills. You will need to know the dimensions of your existing grids to help you find the right part.

To get the correct Costco 21129 BBQ parts

You should measure your existing parts and compare them to what we show here. This is best done with them removed from the grill.
Verify your Costco model number by checking the CSA appliance tag on your grill to make sure you have the correct model number. Do not rely solely on the owners manual as these are frequently mixed up at retail stores when the grills are assembled. You'd be surprised at how many folks have the wrong owners manual.

21129 Burners

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44305-R 5-Pack Cast stainless steel burners for Costco model 21129.

Replaces original Bull part# 44305
Includes adjustable air shutter and screw in the venturi for adjusting air flow.
Sold as a set of five (5) burners

Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.

Part Number: BULL-44305-R-X5 (Replaces Costco BULL-44305-X5)
Dimensions: 16 1/4” x 2 7/8”
Material: stainless steel
Weight: 16.25

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44305-R Cast stainless steel heavy-duty burner for Costco model 21129.

Replaces original Bull part# 44305
Includes adjustable air shutter and a screw in the venturi for adjusting air flow.
Sold individually

Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.

Part Number: BULL-44305-R (Replaces Costco BULL-44305)
Dimensions: 16 1/4” x 2 7/8”
Material: cast stainless steel
Weight: 4.0

==> All Costco Burners.

21129 Cooking Grids

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16517-R 5-Pack Stainless steel cooking grates for Costco model 21129.

SET OF FIVE (5)
Premium grade 304 stainless steel
Solid stainless rods

NOTE: Some models refer to this part as a Cooking Grid.

This part replaces original BULL part# 16517.

Part Number: BULL-16517-R-X5 (Replaces Costco BULL-16517-X5)
Dimension Front-to-Back: 19 1/2”
Dimension Side-to-Side: 7 1/2”
Material: stainless steel
Weight: 25.00

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16517-R Stainless steel cooking grate for Costco model 21129.

Premium grade 304 stainless steel
Solid stainless rods
Sold individually

NOTE: Some models refer to this part as a Cooking Grid.

This part replaces original BULL part# 16517.

Part Number: BULL-16517-R (Replaces Costco BULL-16517)
Dimension Front-to-Back: 19 1/2”
Dimension Side-to-Side: 7 1/2”
Material: stainless steel
Weight: 5.00

==> All Costco Cooking Grids.

21129 Heat Plates

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16521-R 5-PACK Premium grade stainless steel flame tamers for Costco model 21129.

Replacement for original Bull part# 16521.
Fits Bull-made 4 and 5-Burner grills.
One required for each burner.
Sold as a set of five (5).

Part Number: BULL-16521-R-X5 (Replaces Costco BULL-16521-X5)
Dimension Front-to-Back: 17 5/8”
Dimension Side-to-Side: 4 5/8”
Material: stainless steel
Weight: 4.5

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16521-R Premium grade stainless steel flame tamer for Costco model 21129.

Replacement for original Bull part# 16521.
Fits Bull-made 4 and 5-Burner grills.
SOLD INDIVIDUALLY.

Part Number: BULL-16521-R (Replaces Costco BULL-16521)
Dimension Front-to-Back: 17 5/8”
Dimension Side-to-Side: 4 5/8”
Material: stainless steel
Weight: .90

==> All Costco Heat Plates.

21129 Accessories

Wundersmoke Maple Chips. These unique maple wood smoking chips add distinctive maple wood flavoring to your food. For use will all grills. One 1lb bag. Comes with reusable puck.

Part Number: BP-7
Weight: 1.0

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EZ Check Gas level indicator. Accurate from -22° to 104°F. Magnetic back. Works on all sizes of tanks.

Part Number: 00030
Weight: 0.1

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Stainless steel chicken roaster. Commonly called Beer Can roasters.

The best way to roast poultry on the grill
For use in barbecues and ovens
Dishwasher safe
Includes rack, rack support, and basting brush

Part Number: 41333
Material: stainless steel
Weight: 0.10

12” long wood handle brass bristle grid brush with scraper and leather hang strap.

Part Number: WB-1
Dimensions: 12
Weight: 0.4

==> All 21129 Accessories.

BBQ Part Categories

Costco gas grill 21129 - Tuesday, Jun 10 2025

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More Costco grill models we have parts for
CGR30LP \| CGR30NG \| CGR44 \| CGR54 \| CS784LP \| CS812 \| CS812LP \| CS892LP \| GSC3218WA \| GSC3218WAN \| GSS2116B-1 \| PC-2600L \| PC-2600L (pre 2006) \| PCA-2600L \| PCA-2600L (pre 2006) \| SGIR27LP \| SGR27LP \| SGR30 \| SGR30M \| SGR30MLP \| Steadfast Two \| TGR30LP \| TGR38 \| 1500111 \| 1500131 \| 2001SS-LP \| 210001-LP \| 21009 \| 21011 \| 21118 \| 21118CE \| 21119 \| 21119CE \| 21128 \| 21128CE \| 21129CE \| 44328 \| 44329 \| 463230703 \| 463241205 \| 463242304 \| 463269806 \| 464246004 \| 466242404 \| 466242504 \| 527036 \| 720-0008-LP \| 720-0011 \| Complete list of Costco grill models...

More Costco grill models we have parts for

CGR30LP | CGR30NG | CGR44 | CGR54 | CS784LP | CS812 | CS812LP | CS892LP | GSC3218WA | GSC3218WAN | GSS2116B-1 | PC-2600L | PC-2600L (pre 2006) | PCA-2600L | PCA-2600L (pre 2006) | SGIR27LP | SGR27LP | SGR30 | SGR30M | SGR30MLP | Steadfast Two | TGR30LP | TGR38 | 1500111 | 1500131 | 2001SS-LP | 210001-LP | 21009 | 21011 | 21118 | 21118CE | 21119 | 21119CE | 21128 | 21128CE | 21129CE | 44328 | 44329 | 463230703 | 463241205 | 463242304 | 463269806 | 464246004 | 466242404 | 466242504 | 527036 | 720-0008-LP | 720-0011 | Complete list of Costco grill models...