BMW M340i xDrive Engine idle speed is high Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(6,643)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(6,643)

Engine idle speed is high Inspection Service

How much does a Engine idle speed is high Inspection cost?

On average, the cost for a BMW M340i xDrive Engine idle speed is high Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2020 BMW M340i xDriveL6-3.0L TurboService typeEngine idle speed is high InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
2021 BMW M340i xDriveL6-3.0L TurboService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
Show example BMW M340i xDrive Engine idle speed is high Inspection prices

What is engine idle speed and how is it maintained?

Engine idle speed is the speed, measured in revolutions per minute (RPM) an engine is designed to run at when the engine is fully warmed up and the vehicle is stopped in park or neutral. Typically, the idle speed will be set at a value in the range of 600 to 800 RPM, but the exact value will depend on the number of engine cylinders and whether the vehicle is equipped with a manual or automatic transmission. Idle speed is maintained by the throttle body working in conjunction with the vehicle’s powertrain control module.

When to check for idle speed issues:

  • RPM on dash gauge does not match OEM specification. Many cars have RPM gauges. If the engine speed displayed on the gauge does not match the original equipment manufacturer (OEM) specification on the underhood label, there is probably something wrong.
  • Engine is idling higher than normal. If there is no RPM gauge but the engine sounds like it is turning faster when idle, a mechanic can use an instrument to measure the actual engine speed.
  • Harsh engagement in drive. If the idle speed is too high, the vehicle will jump forward when placed in drive.
  • Excessive brake effort is required to hold vehicle at a stop. If idle speed is normal, only a very light force on the brake pedal will be necessary to prevent forward motion in drive.

How do mechanics adjust or repair incorrect idle speed?

The repair procedure depends on the exact cause of the high idle. The below lists common causes of high idle and in each case, the appropriate vehicle system, components, and parts involved would be inspected, removed for repairs, and/or replaced as needed.

Faulty Fuse: In the majority of vehicles, engine idle speed is controlled via an idle control valve (ICV). A faulty or blown fuse in other electronically controlled systems can cause the Idle Air Control (IAC) motor to malfunction, leading to a higher than normal engine idle speed.

Faulty Idle Air Control Valve (ICV): Some cars are equipped with an idle air control valve to maintain idle speed. This part can malfunction due to excessive carbon buildup in the intake manifold.

Vacuum Leak: On any engine, a vacuum leak will cause a high engine idle as the oxygen sensor detects lean operation and the engine computer then tries to compensate, which can result in abnormal idle. Malfunctioning Throttle: A malfunctioning throttle system can cause both a high or low idle as well as an engine stall. A dirty air intake or cracked air intake tube is often the culprit. Computer Malfunction: If the powertrain control module is malfunctioning, idle speed may be affected.

Is it safe to drive with incorrect idle speed?

No. High idle speed could make your vehicle difficult to control and were the idle speed to suddenly and unexpectedly increase to really high levels, you could experience unintended acceleration. Even moderately high idle speed, that is up to 1,200 RPM will make it more difficult to slow your vehicle when stopping and, once stopped, there remains the risk of your foot coming off the brake and the car jumping ahead. High idle speed also wastes gas and can be distracting as the vehicle does not perform as expected.

When addressing idle speed issues, keep in mind:

  • Related functions, such as the idle up function when the air conditioner is turned on, will be inspected by a mechanic during the repair of a high idle problem.
  • Prior to replacing parts, such as the throttle body, the mechanic will also need to rule out electrical causes of incorrect idle speed as well as physical causes such as vacuum leaks.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(6,643)

Rating Summary
6,192
205
60
44
142
6,192
205
60
44
142

Justin

8 years of experience
372 reviews
Justin
8 years of experience
BMW 528i L6-3.0L - Starter - Hollywood, Florida
He was on time, knows what he was doing experienced and courteous. I would recommend him to my friends and family.

Duane

25 years of experience
512 reviews
Duane
25 years of experience
BMW X3 L6-3.0L Turbo - Brake Pads Replacement (Rear) - Solana Beach, California
Really a pleasure not to go to a shop, and have a mechanic you can trust.

Sam

17 years of experience
115 reviews
Sam
17 years of experience
BMW 335i L6-3.0L Turbo - Serpentine/Drive Belt - San Diego, California
San was great. He was professional and explained the reason behind the issue. He was showed up on time. He also noticed some leaking oil and sent thru a quote and was helpful in suggestion a time frame of when to address the next concern. Highly recommend Sam and the Your Mechanic service!

Emmette

36 years of experience
282 reviews
Emmette
36 years of experience
BMW Z3 L6-2.5L - Spark Plugs - Arlington, Virginia
Emmette was fantastic! He arrived early. He changed my one of my ignition coils and all spark plugs. When doing so, he showed me an oil leak seeping into the plugs which he explained caused the short. A different repair shop I went to two days prior advised e to change all coils and plugs at a price of $1,100, They never once noticed the leaking oil under the failed coil (and all others). When my car sputtered a bit on initial start up, Emmette insisted I take it for a ride while he waited for my return. He did so to ensure that the repair worked and I was satisfied. Emmette also inspected my entire car on his own accord. He sprayed a squeaky door, adjusted my tire pressure which was excessive (55 lbs of pressure instead of 32 in all 4 tires. This excess was done by a dedicated "tire" shop when they put my new tires on...What the heck!). He also fixed a bent gas cap (which is likely the cause of 2 EVAP leak codes). He did so at no charge, whereas the other shops wanted to replace major EVAP parts at yet another $1, 500. So far, no EVAP code has returned. I was a bit apprehensive having an unkown mechanic outside of a physical shop do the work on my BMW Z3. However after my exceptional experience with Emmette, I'm going to hire him to replace an expansion hose and to further diagnose and fix the oil leak he found.

Excellent Rating

(6,643)

Rating Summary
6,192
205
60
44
142
6,192
205
60
44
142
Number of BMW services completed
73073+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

How Often Should Brake Fluid Be Changed?
Brake Brake fluid is a hydraulic fluid that is used in automotive braking systems. The most often used brake fluids on the market today are glycol-ether based. However, mineral oil based brake fluid is available as well. The brake fluids...
Symptoms of a Bad or Failing Fuel Meter Assembly
Common signs include the fuel gauge behaving erratically and getting stuck on full or empty.
How Long Does a Wheel Seal Last?
The The wheels of a car are very important in regards to getting the car moving. In order for the wheels of the car to move, a person will have to make sure all of the bearings and seals are...

Fluttering noise when accelerating

The noise you are hearing is most likely a broken door or window seal that is letting air into the passenger compartment, causing the fluttering you are describing. I would suggest having a certified mechanic run a noise inspection (https://www.yourmechanic.com/services/car-is-making-a-noise-inspection)...

2003 Mercedes-Benz C230 turn signal switch problems

Then turn signal switch internal parts hold it in one direction or the other normally until the steering shaft contacts the lever mechanism and returns it to center. You have a defective turn signal switch and need to replace it....

Car making loud noise power steering stopped now car died while driving after being jumped twice

Claimed by Jeff Engstrom

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com