Why does my Lexus LS 500 jerk when it shifts?

Short answer: A cold-morning 1-2 jerk, a delayed or harsh shift into drive, or a bump when slowing is common on the LS 500's 10-speed, and Lexus has software fixes. Ask the dealer about L-SB-0039-18 (2018-2020) or L-SB-0003-22 (2021-2022).

Symptom: A jerk on the 1-2 shift when cold, a delay or thump shifting from reverse to drive, a clunky downshift when stopping, or jumpy low-speed acceleration.

What to check first

1. Note when it happens: cold or warm, which shift, and what speed.
2. Ask the dealer to check for bulletins L-SB-0039-18 or L-SB-0003-22 for your VIN.
3. Ask about a transmission learning reset after any update.
4. Get any codes read if the check engine light is on.
5. Run your VIN at nhtsa.gov/recalls.

Likely causes

1. Engine/transmission software that needs an update. Lexus bulletin L-SB-0039-18 says some 2018-2020 LS 500s may have a delayed R to D shift when cold, a shift bump when slowing to a stop, or a harsh R to D engagement, and revises the engine computer software. An owner said bulletin L-SB-0003-22 covered his 2021.
2. Transmission learned values need a reset. The 10-speed adapts to how you drive. Owners said a dealer can reset this learning.

What it usually costs

Owners had it done at the dealer (one under CPO coverage). They didn't post prices.

Is it safe to keep driving?

Yes for occasional mild jerks. If it slips, flares, won't engage or shows a warning, get it checked right away.

DIY or shop?

No. The fix is dealer software.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists 3 recall(s) for the Lexus LS 500 in these years, and none match this problem. Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect. NHTSA's recall lookup returned no data for 2021-2025.
• NHTSA complaints: 2 keyword-matched complaints for Lexus LS 500 2018–2025 (of 10 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-04; keywords: transmission, shift, jerk, harsh, hesitat, lurch, gear, downshift) (NHTSA returned no data for 5 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Transmission jerks from 1st to 2nd gear on ClubLexus, a 2021 LS 500 CPO owner had a jerk on the 1-2 shift for the first drive of the morning that went away once warm. Another owner thought 2018-2019 cars had a known shifting issue and suggested a learning reset. The dealer reproduced it and found bulletin L-SB-0003-22 for the car.
• In Transmission Issues on ClubLexus, a 2019 LS 500 owner sometimes felt a jerk shifting between park, drive and neutral. 2020, 2023 and 2024 owners mentioned an occasional jerk or a clunky downshift when coming to a quick stop, which was rare if they slowed gently.
• In 2020 LS500 Smoothness on Reddit r/Lexus, a 2020 LS 500 owner said acceleration from a stop felt jumpy in normal mode at low speed but smooth in sport. A reply said sport holds gears longer instead of shifting several times.

Quick tip

Bring it in cold so the dealer can feel the problem, and ask for the bulletin by number.

Vehicle focus: Lexus LS 500 (RWD/AWD), 2018-2025, 10-speed automatic.

Safety / mechanic note

A transmission that won't engage can leave you stuck in traffic. Verify with a mechanic.