Rear Bumper Diffuser (Performance)

Tesla OE: 1831986-00-C / 1831986-00-B / 1831981-00-C

Also written as: 183198600C, 183198600B, 183198100C

List price: CA$79.00 CAD · net pricing for approved trade accounts · same-day Metro Vancouver delivery for qualifying orders placed by 11 AM PT. Ships to any address in Canada by ground courier: about 2 business days to Alberta and Saskatchewan, 3 to Manitoba, 5 to Ontario and Quebec (business days, not counting weekends).

How does this compare with Tesla's price? Rough Tesla vs MapleV price ranges by part type are in our Tesla collision parts price guide.

Replaces an underbody shield or wheel liner that's torn, cracked, or missing after road debris, a curb strike, or undercarriage contact.

Rear Bumper Diffuser (Performance) — Tesla OE 1831986-00-C / 1831986-00-B / 1831981-00-C

Aftermarket, direct-fit rear bumper diffuser for the 2024 Tesla Model 3 Highland Performance — the black lower rear diffuser panel below the rear bumper for the Performance trim. Cross-referenced to Tesla OE 1831981-00-C, 1831986-00-C and 1831986-00-B. As a low rear panel it is exposed to kerb and debris damage and is commonly replaced during rear underbody or bumper repair. Aftermarket replacement, locally stocked in Greater Vancouver.

Fits Tesla Model 3 Highland (Jan 2024–).

Tesla revises the suffix on this number over time — 1831986 is the base number and identifies the part position; the trailing letters are Tesla's own revision level. We carry it as 1831986-00-C and 1831986-00-B. If your estimate shows a different suffix on base number 1831986, send us the number and we will confirm the revision before shipping.

Specifications

Models	Tesla Model 3 Highland
Years	Jan 2024–
Category	Underbody Guards
Placement	Below the rear bumper
Function	Rear lower shield / undertray (Performance)

Warranty & returns

Warranty: Limited Lifetime Warranty against defects in material and workmanship on the vehicle the part is first installed on, for as long as the owner at installation keeps that vehicle.

Returns: unused parts in their original, undamaged packaging may be returned within 30 days of the invoice date. Installed, painted, prepped, drilled or otherwise altered parts are not eligible. Return shipping is the buyer's responsibility unless the part is defective, mis-shipped, damaged in transit, or returned under the fitment guarantee.

Full terms: warranty policy · refund & returns policy.

Frequently asked

What is this part?

It is the black lower rear diffuser panel below the rear bumper for the Model 3 Highland Performance.

Will it fit my Model 3?

It fits the 2024 Model 3 Highland Performance. Confirm OE 1831981-00-C or 1831986-00-C against your original part before ordering.

Is this an original Tesla part?

No — it is an aftermarket replacement cross-referenced to Tesla OE 1831981-00-C, 1831986-00-C and 1831986-00-B.

Browse: Tesla Model 3 Highland Underbody Shields · all Tesla Model 3 Highland collision parts

Guides: Model 3 Highland vs 2017–2023 parts · Tesla collision part prices in Canada · OEM vs aftermarket vs CAPA parts