sometimes would not go into reverse and sometimes would not go into park
fuel pump @42psi new plugs and filters and still will not run. Tries to start but just wont kick.
replace throttle valve, was stuck closed
broken pipe needed complete exhaust system
Neutral sensor defective
cylinder head replaced due to worn valve guides leaky oil pan
Used 6 quarts of oil in 2 weeks, replaced the entire short block.
Wiring harness for O2 sensor chafing on hose from air pump. Wrapped harness in electrical tape, then ziptied a rubber hose around the harness to prevent further chafing.
Cooling system leaked crank shaft position sensor failed
fuel pump fuse blew, stranding me, on 3 occasions. Dealer easter egged it, selling me $559 fuel pump. Fuse blew again. Tested my old fuel pump, under head pressure, for over an hour at 14vdc. Pump refunded. Pinched wire-factory defect.
I could move the gear selector but the transmission would not select a gear and would beep. Moving forward in Drive (when it worked) would fix problem temporarily. Car fine after clutch reflash.
Muffler failed. Secondary air injection pump replaced.
Secondary air valve replaced.
secondary air injection valve malfunction
Check engine light, code P0455. "O" Ring on gas cap was misaligned. Once it was aligned, code cleared.
Intermittent clutch engagement problem. Did software update, and is OK so far.
Reset the engine light. Not a problem.
code p0442 - leak in evaporator emissions system
replace purge valve.
new transmission mount needed
Check engine light went on. Onboard computer diagnosed it. Took it to a non-Smart dealer who ordered then installed the part- an emissions control valve. Replaced defective emissions control valve.
gas cap cracked, got new one installed by self.
needed a muffler assembly due to break in connecting metal hose leading to carburetor, probably from bad pot holes on NJ roads shaking car a lot.
The alternator belt snapped. This caused the heating pump to stop, too. Smart Roadside told me that driving was fine, but a few miles later, I'd fried the engine :(
Fuel mixture rich, determined two intake gaskets needed replacement
Sensors indicated excessive rich fuel mixture. This is a repeat of the earlier repair issue which was corrected initially but then returned after a month. The dealer corrected the issue again at no charge.
engine light on,checked for vacuum leaks and reset fuel settings
shift module replaced
Transmission and battery upgrade.
Replaced leaking valve gasket allowed oil to pool around spark plugs.
Caused electrical malfunction.
Broken flex-tube. Replaced by welding in an after market one. Rest of exhaust and cat is in good condition.
Oxygen sensors clogged. Replaced engine air filter. The one I had installed was too dense.
Outside temp sensor failed. Was replaced. Unclear if repair successful. CEL came back on afterwards, the went back off. Need cold weather to test.
Muffler flex pipe was broken. Loose and melting back bumper. Muffler was replaced.
replaced failed purge valve
muffler and tail pipe replacement
Exhaust system broken flex pipe. Dealer wanted to replace the whole system, got my mechanic to replace the flex for a small fraction of the price.
check engine light stayed on - required replacing emissions sensor on engine
check engine light came on, dealer checked error code, related to a sensor that failed not covered under warranty, paid for parts ($48) and labor; in an out in about 1.5 hours, this car is serviced by MBenz dealer so labor rates are higher
Failed crank position sensor. Car rendered totally useless.
Check engine light came on. Diagnosed as faulty switch over valve, which was replaced.
Needed a new fuel plug
Check engine light came on due to faulty secondary air system switch over valve.
Engine light came on and stayed on.
faulty gas cap
Airflow valve was sticking. This has been a common problem with the Smart4two cars.
Dealer replaced the secondary air injection valve.
Alternator drive belt shredded which destroyed the oil pressure sending unit and an emission control line.
Air injection valve replaced.
The car shut itself off in hard left turns 3 times.
Secondary air injection valve faulty. P0410
Engine light came on and was an emission valve. Repaired the next morning.
Error P0410 - Replaced Secondary Air Injection Valve.
Motor stopped as I was driving. Was able to restart immediately, after pulling over. Dealer found nothing wrong and no reason for the incident.
P0410 code shown on ScanGauge. Dealer replaced Secondary Air Injection Solenoid.
The check engine light came on. Owner's manual said not to drive it. The problem was a bad switch over valve. Valve ordered.
It was a repair for the check engine light that had come on previously. This visit was previously reported. A sensor had caused the problem and dealer replaced it on this visit.
Check engine light came on and took the car to dealer. Issue was engine sensor and made car run sort of rough. Resolved with new sensor.
Secondary air pump replaced. Took car to shop when check engine light came on.
Reflash of transmission shifting software, termed smart 2.0. This makes the transmission shift points different and allows changing to the paddle shifters from auto mode by pulling on the shifter.
Took car to dealership service dept. to get maintenance reminder reset after doing an oil & filter change in addition to changing the transmission oil. I could not get the reminder to reset using several suggested methods.
Car was intermittantly throwing a P0410 code. The cel light was coming on more frequently. The secondary air valve was replaced and the computer reset. Concern appears to be resolved.
Engine light error #po410 replaced part no more problems. 2.0 update reprogrammed transmission, replaced battery.
Replaced Air injection module.
Secondary air valve bad.
Gear shift stuck. Upgraded to 2.0, lubed shifter.
Smart 2.0 software upgrade - enhance transmission to work like the 2009 transmission.
Water in gas
Routine 10,000 mile service. They also did the Smart 2.0 upgrade - transmission reflash, new more powerful battery, shifter lube and gave out the new, updated owner's manual.
Check Engine Light X2 Codes failed O2 Lambda sensors. Necessitated removal of rear muffler box to remove by welding torch flame sensors seized into threads, due to no anti seize compound applied at time of manufacture/assembly.
check engine light came on. code=p0445-p0457. inspection of gas cap indicated gasket distorted. replaced gas cap.
Lower motor mount bolt became loose, caused a ckunking noise when car shifted gears. Tightened bolt.
Emissions secondary air pump noisy (Suspect bearing going bad)
Sometimes could not switch gear into D or R. Dealership said they had about ten cars more this year with the same behavior. Updating the firmware should fix the problem which after driving a few thousand miles seems it did.
Engine runs on two out of three cylinders. I keep it for now because I can still drive it around town as long as the engine stays relatively cool.