smart warranty extension EW- 2nd Air Injection Com
What it saysIn our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz AG (“MBAG”), the manufacturer of the Mercedes-Benz vehicles… NHTSA’s full summary ↓
smart filed this with NHTSA as a warranty extension dated Feb 18, 2022, received Apr 27, 2026, about the engine. It names 2 model years (2016–2017). A warranty extension is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz AG (“MBAG”), the manufacturer of the Mercedes-Benz vehicles is extending the warranty coverage on the secondary air injection system combination valve in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years / 150,000 miles (whichever occurs first) due to the following condition: • The secondary air injection system combination valve may not close completely under certain climate conditions due to condensation in the exhaust system. An open combination valve could lead to an activation of a Malfunction Indicator Lamp (‘MIL’), which could cause the vehicle to fail a state smog inspection.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| EW- 2nd Air Injection Com | Warranty extension | Feb 18, 2022 | 11031591 | PDF, 1,564 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 31 complaints with NHTSA since 2015. 9 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
I have had it for 6 years. And it has been in for repair, at least 7 times in those somewhere around one time per year. Sometimes twice. All for heating 3 times same piece not sure what to do but it always has to do with no heat to car or overheating my insurance through carmax bout to end gonna cost me alot to keep it even though I love…
2016 smart fortwo · Engine · filed with NHTSA Mar 9, 2026 · ODI 11722865
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for smart, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is smart EW- 2nd Air Injection Com a recall?
No. A warranty extension is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the EW- 2nd Air Injection Com repair free?
A warranty extension is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does EW- 2nd Air Injection Com cover?
The manufacturer filed it against 2 model years: 2017 smart fortwo, 2016 smart fortwo. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.